Installing Android 7 on a Nook HD+ for free

How to upgrade your Nook HD+ to Android 7 (Nougat)

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Synopsis: This is a quick guide on how to install Android 7 (‘Nougat’) on a Barnes and Noble Nook HD+ device.  (If you want to upgrade a Nook HD instead, please look at my other blog post, here.)

You don’t need to be a full-fledged hacker to do this upgrade, not at all, and if you have 30 minutes to spare you can breathe new life into your tablet.  Read on to learn how.

Do you have a Barnes and Noble Nook HD+ and are wondering what to do now that B&N has essentially abandoned support for it?

It’s a pity– the HD+ is one of the great values out there, dirt cheap on eBay and with a hi-res 1920×1080 screen display, it’s great for eBooks and videos.

nook-hd-plus_thumb
image courtesy of gadgetian.com

The trouble is, the OS on the device is a customized version of Android 4.0, several years old and which is rapidly being phased out.  If you go to the Google Play store on the Nook you’ll find more and more apps that claim they’re ‘not supported’ on the device.

That’s not because the hardware is obsolete.  The Nook HD+ has a dual core chip and that excellent HD display.  It may not have all the bells and whistles as the latest Android tablets but it has plenty of horsepower to run most apps.  So if you have one laying around, what to do?

It turns out you can upgrade the Nook to the latest (as of February 2017) Android OS, version 7.1 (‘Nougat’).  To do this you’ll need a microSD card, at least 1 GB in size, and a card reader that lets you read/write to it from a PC.  These items are very inexpensive these days.

There’s a very active community that makes current custom ‘images’ of Android that run on a variety of devices.  Luckily, the Nook HD+ is one of them.  It so happens that Android is an open-source platform, which means Google releases the source code for anyone to modify.  Some enterprising folks have therefore ported the code to the Nook HD and HD+.  If you see the term ‘cyanogenmod’ bandied around, that’s one group that ports Android to various devices.

This blog post is for people who want to move their Nook HD+ device to Android 7 quickly and with as little fuss as possible.  In a couple of paragraphs I’ll show you how to do this, but I’d be remiss if I didn’t first mention a couple of resources that helped me.

There are terrific resources out there on installing Android on a Nook HD+, though it can be hard to find everything in one place.  Let me post the most user-friendly one, here:

Installing Android 5.1 on a Nook HD+

It’s what got me started and is a wonderful resource, though as the title indicates, it’s for Android 5.1 and not 7.

Another resource you might enjoy is a comprehensive beginner’s pdf  attached to this post that discusses how to install Android 5.1 ( ‘cyanogenmod 12.1’ in the community lingo) on the Nook.  It was written by some retired guys who wanted to juice up their old Nook devices and is very beginner-friendly.

Ok, enough of the background and history, let’s get to business.  For those of you who want a streamlined version of how to go to Android 7, start by downloading three files from my dropbox folder.  They’re curated from various Android forums, and are:

  1. cm_ovation-ota-NMF26Q.161222.zip— this is Android 7.1, in a zip format, courtesy of a gentleman named  Andrei Măceș, someone very active and respected in this sphere.
  2. emmc-cwm-early3.1.img.gz — this is a ‘bootloader’, something that lets you get the whole process started.  You unzip this, install/flash it on a microSD card and put it in your Nook HD+ and boot from it to get the installation going.   We’ll go over how to do all this.
  3. open_gapps-arm-7.1-pico-20170203.zip— this is a package that contains the Google Play Store for Android 7.  With Google Play on the device you can install all sorts of 3rd party apps (Netflix, etc.)  Google Play is your gateway to the full Android ecosystem.

Be aware that these files total 350 megabytes combined, so downloading them will take a few minutes on a good internet connection.  (Just to underline, the files above are for the 9″ Nook HD+.  For the 7″ Nook HD read my companion blog post here.)

Using these three files and the steps below, you can upgrade your Nook HD+ to Android 7.

Start by unzipping emmc-cwm-early3.1.img.gz to a temporary folder on your hard drive with any unzip program you like, 7-Zip or WinRar or take your pick.  Note that the file extracts from 7.5 MB to a ‘img’ file 900 MB in size– that’s some serious compression, so make sure you have room on your hard drive.

What is this 900 MB file that came out of the zip?  It’s the bootloader we’re going to use to start the Android tablet with and get the ball rolling.

With the img file unzipped, you’ll need to write it to a microSD card.  (Again, you can buy these cards and USB adapters for them to plug into your PC very cheaply these days.)

The way I wrote the img file to the card, and the way discussed in the tutorial I linked to above, is to use a free program called win32 disk imager.  This will wipe the microSD card and extract the img file to it in such a way that you can boot from the card.  (If you don’t use Windows, Mac and Linux software is out there that does the same thing.)

Install win32 disk imager on your PC and fire it up and you’ll see a dialog.  Choose the img file you just unzipped and make sure you write it to your microSD card, and _not_ one of your hard drives.

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Hit the ‘Write’ button and it’ll take a minute or two to extract the image to your microSD card.  Keep in mind this will wipe out anything on the card, so make sure you don’t have any files on there you need, and once again make sure the drive letter  (F:\ in my example) is that of your SD card, and not a hard drive!

When the image file is written to your microSD card you can simply copy the other two zip files (cm_ovation-ota-NMF26Q.161222.zip and open_gapps-arm-7.1-pico-20170203.zip ) to it, simply drag and drop them to the root directory with all the other extracted files.

Once you’ve extracted the bootloader and copied both zip files to the microSD card you’re ready to install Android 7 on the Nook.

Before you start, make sure your Nook is fully charged, as the Android 7 installation can take 30 minutes or so and running out of power halfway through isn’t much fun.  You’ll also want to save any ebooks, videos or other files you want from the Nook to a safe location before starting, as the procedure we’re using here is a fresh start, clear-the-decks installation that will wipe out any data you have on the device.

Once the device has a full battery, turn it off, insert your microSD card and turn it on.  You should see a ‘cyanoboot’ splash screen, which means the bootloader is doing its thing:

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I’ll note here that sometimes you may need to reboot the device two or three times in order for it to boot from the microSD card, so if you go straight to the old Nook interface, same as ever, just shut the device down and try again.  Eventually you should hit the cyanoboot screen.

(If you’re really having trouble booting from the microSD card, believe it or not you might try your luck with a different one– Nooks can be *very* picky about the cards they’ll boot from.  Try an older card, perhaps a class 4 vs class 10 one.  It sounds ridiculous but others have had success going this way.  A 4 or 8 GB microSD card is only about $8.00 shipped from ebay, so no harm trying.)

Once the splash screen fades you’ll be presented with a boot menu and options similar to the below.

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The way to navigate around the menu is to:

  • Use the volume buttons to move up and down,
  • Use the Nook home button to select the currently highlighted choice
  • Press the power button to go up one menu

The first step  is to wipe the device and start fresh.  Again, that means copying any files you want off the Nook to a safe place beforehand and choosing the ‘wipe data / factory reset‘ option.  Wiping the device will take a moment and you’ll see some progress text at the bottom of the screen as it goes through it.

(Note: the tutorial I linked to above discusses various recovery options and other halfway measures that allow you to upgrade your Nook in-place rather than wipe the data and start fresh.  By all means explore that option if you like, but for me it’s easier to get a clean slate and the general consensus is that it’s the simplest way forward.)

Assuming you’ve wiped the data and done the factory reset, you’ll want to restart the tablet by going up to the root menu and selecting “reboot system now“.  (If, after selecting the reboot option you’re asked any questions or warnings about ‘root’, just say no to them and get the reboot going.)

When the device reboots you’ll return to the root menu.  This time, choose the ‘install zip‘ option and from there choose the external_sd folder.  In there, you’ll want to install the cm_ovation-ota-NMF.161222 zip file:

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Give that a minute or two, then return to the same menu area and this time choose to install the open_gapps-arm-7.1-pico-20170203 zip file.  This will install Google Play on the device.

With that done, go ahead and reboot the device, this time with the microSD card removed.  (As with the first time you rebooted, you may be asked a question at this point about ‘root’ needing repair– this is because we’ve removed the SD card.  Go ahead and say ‘no’ to this, if the question appears.  It’s not a big deal either way, just an artifact of our having removed the card.)

The initial boot sequence may take ~10 minutes the first time through as it calibrates in the background, so get a cup of coffee at this point.

You may have to power down and reboot one or twice to get things moving– this is not unheard of, so don’t worry if the procedure seems a little slapdash.

When all is said and done, after 10 minutes and/or a reboot or two you should be in good shape and looking at an Android 7.1 device, with Google Play installed, and you’ll be ready to go.

Update 6/2017– apparently Netflix is now blocking any rooted android tablet from downloading their app from the Google Play store, because of location-specific content restrictions, which is annoying. However, you can still install Netflix on the tablet easily enough, as discussed in this article among many. 

This also applies to the Barnes and Noble reader app, which is also ‘blocked’ on the Google Play store from any device / OS combo they don’t approve of.  The way to get around that is to go to a site such as apkpure.com and look up the Nook reader, download the apk file and install it via Chrome.

190 thoughts on “Installing Android 7 on a Nook HD+ for free”

  1. “This is an Android thing, very annoying for someone who hasn’t seen it before– what you have to do is tell the Nook HD+ to go into ‘USB file transfer mode’, so that its folders appear in explorer. By default when you connect it to the PC it enters ‘charging mode’.

    The way to copy files over is to connect your Nook to the PC, as you’re doing now, and then swipe down from the top-right of the screen to see the device options (brightness, wifi, battery level, etc).

    At the bottom you should see a section for ‘Android System’ where it says ‘USB charging this device’. Tap that for more options and choose the ‘transfer files’ option– at that point your Nook should appear in explorer with all its folders showing, and you can copy away.”

    Hello, I’m hoping you can answer a question with regards to your response that I’ve quoted above. I definitely have a Nook HD+ but when I go to the utilities screen (brightness, wifi, battery level, ect.) there is not ‘Android System’ or “USB charging this device’ option for me to tap or open or anything. When I have my Nook connected to my PC I do get “USB Connectivity” and when I tap it I get two options: Connect as MTP (for transferring files) and PTP (for transferring photos). When I connect my Nook to my PC, it just registers as MyNook, and there is a folder for books, but it’s empty (there are other folders too, and they are empty as well).

    What step(s) am I missing? Thanks.

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    1. Hi Nancy,

      You should see this when you connect your Nook HD+ to the computer using the USB cable. If you do that, then swipe down from the top right of the screen, as if you’re opening the utilities, you should see some notifications below. One of these should say ‘USB for charging – touch for more options’– that’s the option you want to tap in order to switch over to ‘File transfers’.

      Like

    2. This worked great! Did not have to reboot at all; it went the first try! This was my wife’s Nook HD+ and she is very happy. I enjoyed it so much, I thought about upgrading my Proscan PTL9649G (currently has Android 4.4). I thought I might try that Android 5.1. would those same downloads work with the Proscan?? Could that Proscan support 5.1 or even 6.0??

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      1. Hi James,

        Glad to hear the Nook is working well. Unfortunately this image wouldn’t work on your Proscan. Each Android image is crafted for a specific device; they’re not like Windows 10 where one DVD works across Dell, HP and other machines. All of the Android tablets have little nooks and crannies that have to be taken into account, and custom ‘ROM’ developed for them, more or less.

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  2. Appreciate your great instruction! following your guide I completed the installation of the Android 7.1 on my Nook HD+.
    But after this done, I found a weird issue with this device which was not here before this OS upgrade: this Nook HD+ now can only connected with the wifi of my home but cannot access internet at all, while other devices (laptop, cell phones, iPad) can still access internet via the wifi.
    I can see this Nook HD+ in the router setup panel and the MAC address and IP address also looks ok.
    Have you ever experienceed of heard such issue?
    Could you help to provide some advice for solve or diagnose this issue, please?

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    1. Hmm, you say you can connect to your wifi at home, but even when connected you can’t get to the internet? I’d suspect there’s a MAC or IP filter on your router, but it sounds like you’ve already looked into that? I have not heard of this otherwise. Are you able to connect to the internet using a local coffee shop’s wifi, have you tried that by chance?

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      1. Thank your reply.
        no, I don’t think it’s the router cause this problem because all other devices (cell phones and laptops) works fine with the same wifi. I also tried it in a Starbucks, still the same issue. 😦
        I also tried installing another more later version of Andorid (https://forum.xda-developers.com/nook-hd/development/rom-lineageos-14-1-t3693886), but this problem is still here. looks that the WIFI module got incorrectly configured during the OS installation but I have no idea what it is and how to diagnose it.

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  3. Ok I must be clueless because I don’t see that anyone else has asked this question…

    Actually first of all, thank you for taking the time and energy to put this how-to together. Really looking forward to getting this working on my HD+.

    So now to my question… when using win32 image writer, I noticed you selected the MD 5 hash but I saw no mention of it in the text. Should I select the “none” option or MD5… or something else entirely?

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  4. Well I successfully went though all the steps, shut down from the cyanoboot screen with the power button (because I didn’t want to remove the card in the middle of a reboot sequence) and as of now I have the infamous brick. I’m sure most people know it’s a frustrating loss of $45. Unless the final boot is a black screen, this thing is fried. Bummer.

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    1. If I read correctly, your subsequent comment indicates you’re ok after all, that you simply needed to recharge the battery and pick up where you left off? There are resellers who provide new Nook batteries, I believe you can find them (with instructions on how to install) on youtube if your battery is having trouble holding a charge.

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  5. Apparently the Nook wasn’t charging when plugged via USB to my computer. It was just a battery issue. Despite all the restarts due to low charge, this seems to have worked like a charm. Thanks!

    Liked by 1 person

  6. I have a problem writing the boatloader file to my microSD card. It gets to around 25% and then it quits. Win32 Disk Imager gives me the following error: “Write Error – 1.0. An :error occurred when attempting to write data to handle. Error 1117: the request could not be performed because of an I/O device error.” What am I doing wrong?

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  7. Got everything up and running except for the nook app. tried to DL from play and it doesn’t show. barnes and noble site with link to play store says incompatible.

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    1. Most likely this is because Barnes and Noble and Google Play have a whitelisted category of OSes and devices they let you download from. Tedious and annoying but easily remedied; for instance if you go to apkpure.com and search ‘Nook’ you should find the Nook reader there– you can download it and install the apk file and install it by hand on the device via Chrome.

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  8. Downloaded the Win32 Disk Imager and when trying to “Write” to the micro SD card (New Class 4 32gb) I get an error ” An error occured when attempting to write data to handle. Error 1117: The request could not be performed because of an I/O device error” How do I fix this???

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    1. Could be one of two things I think– try downloading the files again, it’s possible they didn’t come down all the way first time through. Second, you might want to try on a different SD card, an 8 GB or 16 GB ideally. I’ve done this with 32 GB cards before but maybe yours is just different enough to cause Win32 Disk Imager to hiccup?

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      1. Ha, ha, I was trying to do the update with a cheap “1 GB” card that really was only 850MB. Tried it again with a 4GB micro SD, and everything seems to have worked fine.

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  9. Hi, Just wanted to say thanks for your simple and straightforward guide to installing Android 7 on my Nook HD Plus. Apart from some initial problems (which were down to me not having completed one of the steps correctly) the installation went fine. It is nice to be able to use the Nook again as I thought it had become pretty much redundant with it not even being able to run Facebook anymore. All set up with my Google account and just installing the apps I also run on my phone. Many thanks again.

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  10. Thank you for the info, files and tutorials. Made the rooting super easy. I was on the fence about doing it but it was so easy even a cave man could do it!! Thanks, your time and effort were much appreciated.

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      1. Hi Paul. I get the normal android power off option when pressing the power key. After touching the power off option it goes through the normal power off procedure. Within 30 seconds it just boots up again of its own accord?

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      2. Ah, I see now. What you’re encountering is a glitch in the software, nothing abnormal. To really ‘shut down’ the tablet you have to do this– restart the tablet, and as soon as the cyanogenmod logo appears on the boot screen hold the power button down for about 5 seconds. The tablet should genuinely shut down after that.

        Liked by 1 person

  11. I had an issue when preparing the SD card in which the zipped file with Google play would give me an error when trying to transfer it to the SD card. I unzipped that file and was able to load it onto the SD card. When I went through the install process, I was able to load the file that was zipped, but the one I had unzipped couldn’t be read and gave an error. I proceeded through this and everything worked and I now have the 7.1 android but without Google play. I realized that there must have been something wrong with the file when I downloaded the bulk 3 files together in one zipped file and unzipped that. After the fact I went ahead and downloaded each file individually and was able to prepare the SD card with no errors, leaving the 2 zipped files zipped. Is there a way to do a fresh install using these same instructions? I tried multiple times to get the SD card to boot on startup but it just wont. Or is there a way to add Google play separately? I have it on another tablet, but when I tried to download via the nook, it would just send the request to my other tablet.

    And thank you on the instructions on how to power off the nook. I was having the same issue of shutting down normally and it would boot back up.

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  12. I have successfully done the conversion to 7.1 (many thanks for that).
    However, I am unable to copy files or apps to the Nook from my PC (Windows 7).
    It shows up in Device Manager, which says it is working properly and lists drivers; it appears under Devices and Printers as Android; and it is visible in Windows Explorer as MyNook but without any visible contents and without a device letter. (The last time I had a device without a letter was when I tried to attach an 8TB disk drive to my previous Windows XP system, which didn’t support a disk of that size, but I can’t believe that this is a Windows support issue.) It does not appear as a device under Disk Management.
    I tried MobileGo, which can see it and installs a driver for it, but it keeps asking me to attach it to USB as the connection has failed (which I don’t understand if it can see it).
    The Nook is set to handle Unknown Sources and it is in Media mode.
    I also tried it on my Windows 10 laptop. It is detected and shows up in Windows Explorer as BN NookHD+, but when it is clicked there are no contents. There is one difference: it shows up as a device (Eject MTP) under Safely Remove which it doesn’t on the Windows 7 PC.
    This wasn’t a problem when it ran under Nook software.
    There may be an Android setting which I have overlooked but otherwise I have run out of ideas.
    Can you help?
    Many thanks.

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  13. I have now seen your reply to Nancy and it works!
    There is just one difference between the laptop and the desktop. It is still not possible to eject the Nook on the desktop, there is nothing there (although it is possible to transfer files).

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  14. I have just finished charging my Nook (I think for the first time since the upgrade) and it shows me a screen saying Welcome to your Nook, which I have not seen before; it has always gone to the lock screen. It then tells me to set up my wifi network which I do not want to do as I want to stay offline; but I have no choice so I do so. It then tells me there is a critical update which it starts to download, at which point I power off.
    What’s going on, why have I not seen this before since I upgraded to 7.1, and how do I bypass it? Or should I keep going and disable wifi at the end of the process?
    Many thanks.

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    1. I’ve never seen that before. Just so I understand– you installed Android correctly on the Nook and were using it fine, then after you charged it, this message appeared?

      How long had you been using it successfully before this happened? A day, a week?

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      1. Yes, it installed fine, I had used it for about two weeks, then I charged it and this appeared.
        I’ve been looking this up and it appears to be in initial setup mode, but I don’t know what circumstances trigger that.
        I don’t know if I inadvertently did a factory reset (I am not aware that I did), but I’m not sure that that would trigger a tablet setup.

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      2. I decided to proceed with the setup.
        I tried to register using my primary email address but it said I was already registered. That must have been years ago; I had forgotten the password and there was no way to reset it.
        I then started to register using a different email address, but when I got to entering a password, whatever I tried, I got a message saying “Password not allowed” without saying why.
        User-friendly this is not.
        Any ideas?
        Many thanks.

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      3. I solved the password problem by going to the Barnes and Noble website and I finished the setup.
        So now, after two weeks of Android 7, I am back in Nookland! I believe the expression WTF is relevant here!
        Back to the drawing board (or at least your instructions).

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  15. Hi, this looks intriguing. I have several Nook HD+’s and I’m willing to risk one of them to try to upgrade the OS.

    One thing which I don’t see addressed here — and it’s not addressed on any of the “root your nook” sites I’ve visited — is, how do you put your content back??

    The ebooks on my Nook are hidden somewhere in the Nook — B&N won’t say where. There is no way to back them up directly. The only backup I have of these books (hundreds of them, purchased from B&N) is that they supposedly reside on B&N’s servers. If I do a factory reset of my Nook, they reload automatically when I connect to WiFi. But if I destroy the B&N OS of the Nook by installing Android & over it, how do I get these books back on my Nook??

    IF I could get them back I suppose I can install the Nook reader app, and read them — but I have no idea how to get the back.

    Thanks.

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  16. I was able to install Android 7 on my Nook HD+, thanks for the information. However, is there any way to pass Google Plays Safetynet? I want to play a few games but I can’t.

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    1. Hmm, I don’t know much about Safetynet so I can’t be of much help. I do know that you have to jump through a couple of hoops to install Netflix and the B&N reader app because of device checking that’s done in the Google Play store by those vendors, but that’s easily gotten around by directly downloading the apk files at apkpure.com or other such sites.

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  17. A couple of months ago you said:
    “I’m not sure why your battery runs down when the Nook is off– my battery can last months when off, and I have three Nook HD+ units.
    When they are running (this is as Android 7 devices) I always turn off the wifi unless I’m using it. That way, if I’m in standby mode I can last 20 days on each of mine.”
    I have since done the conversion to 7.1.
    Yesterday I was reading an ebook on it for just over half an hour and watched the battery level drop from 89% to 75%. I then powered it off for about two and a half hours and when I powered it back on it was showing 25%. Battery statistics showed that the screen had used 10% and idle/Android/system 2%/1%/1%. Just to check, I restarted but got the same result.
    I looked at it again today after 24 hours powered off and it was showing 16%.
    The device is in airplane mode with wifi and bluetooth switched off, no wallpaper, no screensaver. If I switch on battery saver the screen becomes so dark that it is impossible to read anything.
    If yours last so long, what am I missing?
    Many thanks.

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    1. I think you have to consider the age of the battery, most HD+ are now in the 4-5 years range I guess?
      Seems to me yours is showing it’s age now.
      I have once changed the battery for a new (Chinese) one, you have to be lucky to get a good one if going that road, new battery was just slightly better than the old one in my case.
      But, on the positive side, the new battery was very cheap. 😀

      Like

    2. As galdang said, it’s possible your battery is wearing down, though none of my Nooks run down the battery even close to your rate. Turning off wifi was the key for me, but it sounds like you’re doing the same.

      Your tablet went down to 16% after it was off for a day? What level was it at when you turned it off?

      If you are interested in changing the battery, here are some instructions for doing so from a battery vendor: https://www.youtube.com/watch?v=2dRKRf_x44g

      Like

      1. It was at 25% when I turned it off so it had lost 9% in 24 hours. But that was after it had lost 50% in two and a half hours the previous day. I have just checked again after another day and night powered off and it has gone from 16% to 7%.
        What would be your own estimate (1) after an hour’s reading (2) after overnight power-off (3) after 24 hours power-off?
        Would I be right in thinking that if I put it to sleep rather than powering it off, the battery depletion would be even faster? If so, is the difference significant?
        Is there any way to set battery saver so that it does not dim below readability? Maybe a third party app?
        Many thanks.

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      1. I’m with galdang here, neither of us have seen what you’re experiencing and we’d both like to know more. At a glance it sounds like there’s almost a short in the system or the battery is defective– I mean, a 9% drop in a day with it turned off is uncharted territory for a Nook.
        For me, if I turn off wifi and do nothing else (no powersaver modes, nothing) I can go three weeks on a charge. And if the tablet is off I’m good for at least two months.

        Like

      2. Thanks for the information. That was what I wanted, a baseline from a satisfied user.
        Well, I don’t know what the problem was, but I installed and ran Battery Calibration and Greenify, and the results are much more encouraging.
        Looks like it wasn’t a hardware battery problem after all.

        Liked by 1 person

  18. Thanks for your instructions and files. Upgraded from cm 12.1 and noticed quite an improvement. I hope someone will port Android Go to the nook HD+ and extend it’s life another couple of years.

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  19. I’ve followed every single instruction to the tee. I’m even using an older microSD card, but I cannot get the ‘cyanoboot’ splash screen to come up. I saw you reference the Android 5.1 installation guide so I looked into it to make sure that things lined up correctly. For example, I made sure the MLO file is the very first one.

    I’ve rebooted it about 8 times now, and I’m still getting to the Nook screen. How many times does it usually take for the cyanoboot screen to pop up so I can move forward with the installation?

    Thanks

    Like

    1. Two things pop to mind. Can you post an image of your SD card, what the directory and file structure looks like? Also, if you wouldn’t mind listing the various file sizes that would be good too. Second, you could do worse than trying it with a different SD card if you have one laying around. As the tutorial says, sometimes the Nooks can be picky with the card used, often for no obvious reasons.

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      1. Oh you know what, I looked at my microSD and it literally doesn’t say what class it is. It might be a functioning knockoff. For sure I’ll do another class. Do you recommend a class 2 or a class 4?

        Like

  20. I successfully completed the upgrade but but now the screen is dim (50-60% brightness at most) and does not respond to the brightness control. The settings home page says the adaptive brightness is on regardless of the actual setting of the LiveDisplay option in the Display detailed settings. I downloaded all of the files a second time and re-ran the upgrade process just to make sure and it made no change. Unfortunately this upgrade ruined the one thing that made this tablet worth upgrading – the big bright screen. Now I’m at a loss at how to get my brightness controls back, as extensive searching has turned up no solution to the problem.

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    1. So in LiveDisplay you hit Display Mode and choose ‘Off’ and you’re still at 50% brightness no matter what? Doesn’t make sense, I’ve never had that problem.
      What if you go into a dark closet, then the brightness adjusts to full, or is it still dim?

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      1. The settings menu always says “adaptive brightness is on”. The display settings menu does not mention adaptive brightness anywhere but there is an entry for “Live Display” Changing the live display settings has no effect on the screen. Adjusting the brightness level has no affect on the screen. Changing the light level of the surroundings (like a dark closet) has no effect on the screen. One thing I have noticed: When I boot the tablet, I get the “Nook” logo at full brightness then the cyanoboot logo at full brightness, then the cyanoboot logo fades to 50% and the tablet remains stuck at that level

        Another issue I’ve been having is the tablet always restarts even if I select “shutdown” from the power button menu. The only way I can get the tablet to shut down is to hold the power button until it it quits. I didn’t mention it earlier because it doesn’t seem important compared to the brightness issue.

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      2. I have the same problems with the nook booting back on after powering off. I think the problem is that there are two boot programs, one being Trebuchet and the other being Cyanoboot. I have tried to disable Trebuchet and it keeps turning the nook back on (I get the Trebuchet logo and then cyanoboot) AND I think this is why the battery is running down after only a couple of days.

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      3. @James Van Dyne– the ‘automatic reboot’ thing is a known bug, and Dan stumbled across the fix for it– choose to ‘reboot’ instead of ‘shut down’ and when the tablet reboots and you see the logo, hold the power button down for a few seconds. It will turn off.

        As to your battery only lasting a few days, check to make sure your wifi is off unless needed– when I do that I can go weeks on all my Nooks without having to recharge. With wifi on it’s a few days at best.

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  21. I just did a clean install of this and everything went smoothly, but its showing 22gb of my 32gb internal storage as being used. That doesn’t seem right. When I go to Settings and Storage it is showing 21.66gb of stuff listed as “Other” and 2.11gb listed as “System”. What is all the “Other” stuff? How/can I clear that off?

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    1. That ‘other’ value is really high. Like the tablet says when you go into it, it can include files saved by apps. Have you installed any apps, or this is what you’re seeing right after wiping out the tablet and installing Android 7 fresh?

      Like

  22. i upgraded to 7..1 and it went thru flawless, table is very responsive now, but i cant get any apps to work. they keep crashing of just getting stuck. google chrome/drive. facebook too.

    Like

  23. I keep getting a failure to flash the cm_ovation file.
    It always says Can’t open external_sd/cm_ovation-ota-nmf26q.161222.zip (bad)

    I’ve downloaded it multiple times, reformatted and rewritten the sd card, I can’t get it to flash anything, not even back to stock, so I’m pretty much stuck. Any ideas?

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      1. I got it figured it out, even though I was using a brand new SD card it was the issue. Dug around and found an old one, it worked like a charm.

        Liked by 1 person

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