yashsingh1/xdaforums huggingface dataset:
[Nook HD, HD+ General] PeteInSequim:
CyanogenMod.org has not yet released an official CM-12.1 ROM for our Nooks. The download site you used is actually a collaboration point for research into CM-12.1 done by our very own xda member [MENTION=4473900]amaces[/MENTION]. You will always find his most recent release there. Right now the 20151012 build is offered.

Be aware that these unofficial releases for NookHD and NookHD+ are replaced every few days as [MENTION=4473900]amaces[/MENTION] probes deeply into the workings of CM-12.1. An occasional release will be a step backward, but for the most part each is an improvement over the ancestors.

I suggest that you keep an eye on the thread that documents these developments. It is colossal; post count is 1,192 right now. I always start at the end and browse backwards to see the latest entries. If you see some exciting comments about a big improvement, then download and try that version. Otherwise just wait a while and something exciting will soon appear.
[Nook HD, HD+ General] barrykw:
Hi, I've made my SD card which boots ok but when I try to backup to external SD card I get a message "Can't mount backup path" Any ideas please
[Nook HD, HD+ General] PeteInSequim:
Sorry, nothing comes to mind right now. Did you try removing & re-inserting the card and boot again?

What is the capacity of your microSD card, and is the single partition occupying this capacity?
[Nook HD, HD+ General] barrykw:
Hi, thanks for your quick response. Yes, I've tried several times; I even re-formatted the SD and re-copied the files. Single partition and 4Gb
[Nook HD, HD+ General] PeteInSequim:
Do you have a huge amount of data to be backed up? I don't know how smart CWM is about checking available space before doing backup, but maybe there's just not enough space available for your backup.

How much free space does your Nook have in its internal storage? In a pinch you can order CWM to backup to internal storage instead of the microSD card. It should be safe there, even through the wipes you will do. It is just not in a convenient spot for restoring to the stock OS since you will probably want to devote all your internal storage to your new OS.

Maybe a larger microSD card will fix the problem.
[Nook HD, HD+ General] kenryandub:
Will do over weekend
[Nook HD, HD+ General] rkdev30:
Hello,

I just wanted to thank the OP for putting together the pdf with all the instructions. The only part I was having a problem with was getting my Nook HD+ to boot with my micro SD card. I tried using the MiniTool Partition wizard, but could not get my Nook to boot with the sd card. I finally found another post on the forums by user pastorbennett in his thread, " If you're having trouble booting from SD recovery, read this. by pastorbennett"

I followed his steps and on the first try I was able to boot and get into recovery. I followed the OP's steps and now have CM 12.1 on the tablet.

I wanted to say thanks to everyone in this forum!
[Nook HD, HD+ General] kenryandub:
I found this fixed the auto power on for a few days, but the issue is back now

I booted to TWRP;

at bottom of screen, you will see three small icons

left arrow, home button, and a series of four blue ond white lines, press the

four blue ond white lines

You will see a command line output "updating partition details"

Then back to reboot, then back to power off

Power on tablet, let it boot to Android, Power off , and it should power off as normal hopefully
[Nook HD, HD+ General] Rapier216:
I think I'm missing something, but GAPPs not installing properly

Greetings...

First off, I'd like to thank the OP for the in-depth instructions. I am one of those people who does better when I can go Step 1, Step, 2... :)

Now, I'm having a couple of issues and did not see anyone else having these, so it must be me ;)

Nook HD+ 32GB unit, started out earlier this year with CM11.x, upgraded to CM12.x a couple of months ago (fudging through the other topics). Have had random issues with having to reboot in order to get tablet on (keeps shutting itself off every time I wake it).

I started with your pdf tutorial and have gone step-by-step at least 4 times now, wiping data/cache/etc every time (no backups as I have a backup from previous).

First issue I keep getting it that the tk_gapps.... file keeps telling this:

'TK GApps can ONLY be installed on top of an existing installation of TK GApps. You must wipe (format) your system partition BEFORE installing any TK GApps package.' Then it gives me Error Code: 40.

If I try to use the Mini-gapps... file, when I do my first boot it won't allow me to pull up the tablet keyboard, stating that the keyboard app cannot open (don't remember the exact message), and if I keep going through the wizard, I start getting other App errors.

I went back and downloaded the OpenGApps files (all of them) after manually going to the website (your link in the pdf file for this is incorrect: it doesn't have the website link, only the file name 'http : // open_gapps-arm-5.1-pico-20150828.zip/').

I tried one more install using the Open GApps Stock and now I'm getting the following errors in the wizard first screen (language):

'Unfortunately, the process com.google.process.gapps has stopped.'

'Unfortunately, Google Play services has stopped.'

I get back into TWRP, try to install Open-GApps again, and I get a similar error to the one I got using the TK GApps:

'This Open GApps package can ONLY be installed on top of an existing installation...' and the same Error Code 40.

I've gone through your steps 1 by 1 and cleared the cache/etc every time, including going in once and clearing the Dalvik cache. I've even gone into Wipe in TWRP and done whatever wiping from there.

Can someone please give me some hints as to why I cannot install GApps? I've tried all of the ones listed, except the last 2 forum.xda.*** listed ones.

Thank you and sorry for being a pest :(
[Nook HD, HD+ General] PeteInSequim:
Thanks for posting your solution. One thing I noticed about the MiniTool Partition Wizard is that it might not default to a Primary partition. One of my local colleagues had this problem, and produced several unbootable cards until we had a close look at the settings and then deliberately set it to Primary.

I've always used gparted partition editor with good results.
[Nook HD, HD+ General] PeteInSequim:
I'm sorry this slipped by me. http://opengapps.org/ should get you to the OpenGApps selection page.
[Nook HD, HD+ General] Rapier216:
Fixed :)

No problem... I was able to go there. Again, I appreciate the effort you put into this :)

Well, I am up and running... I ended up going to a different xda page and downloading a different, older GApps file (I think it was from April?).

I also installed the CWM loader and then the GApps and so far, no errors or problems :) I'm in the process of installing my apps right now.

I'm not sure what happened but I think it was using the TWRP and the GApps that was causing my issues. I know that I used TWRP last time I upgraded to Lollipop and I was having intermittent issues.

Again, I appreciate the work you put into this and Thank you for the step-by-step instructions :)

Have a great week :)
[Nook HD, HD+ General] momofx:
Stuttering and Poor video streaming after this update

Has anyone else experienced stuttering and poor streaming when viewing youtube or any other video sites after installing this? I seem to be having that problem on all streaming sites :( Any ideas what is wrong?
[Nook HD, HD+ General] _dave:
same here, google play fails to run

I am also having trouble with google play failing to run. Does anyone have a work-around for this? I did a search but was unable to locate a solutions. Otherwise no issues.
[Nook HD, HD+ General] PeteInSequim:
Stuttering while using these unofficial releases for Nook HD and HD+?

Well, I recall we saw some of this in releases last August or so, but then one day a new release cleared it all up. I haven't seen it since, nor have any of the approximately 12 Nook owners that I'm acquainted with.

Which release is giving you the problem?
[Nook HD, HD+ General] momofx:
Stutterflywifi

Hi, well yesterday I took the Nook HD+ with me to work and it played all streaming content flawlessly! No stuttering or anything of that sort. I wonder if it is something to do with my wifi setup at home. I know its fast enough (100Mbps Down and 20Mpbs up :) )

This morning I tried it at home (on Youtube) and it stuttered for a few seconds and then played normal... The stuttering I speak of, kinda sounds like a scratched audio cd when it skips quickly where it misses little bits and pieces of words in a song...

Either way, the 12.1 that I'm using from your guide is working great and I really like it :) Thanks! :good:
[Nook HD, HD+ General] kenryandub:
It sounds like your WIFI, it it works in work

Update your router firmware

and/or

download wi-fi analyser , this checks your router, there are 12 - 14 channels your router transmits at , some will be congested

pick a less congested channel, use wi fi analyser to do this
[Nook HD, HD+ General] ganjah:
So, recently my Nook HD+ with CM11 started bootlooping - it gets to the Nook screen, then reboots in an infinite loop. I thought this guide might help me format and install Lollipop.

I followed the instructions to the letter. I have the correct NookHDplus-bootable-CWM-6046-for-emmc-BOOTFILES-rev0-(07.13.14) folder, from which I place the MLO file first on the newly-partitioned-and-set-active 32GB microSD card, then all of the other 4 bootfiles, then the install files.

The device fails to boot at all when I install the microSD card. Like, nothing turns on. I hold the power button for 30 seconds, the green charging light goes off, I press the power button again and the green charging light comes on, but nothing displays on the screen. If I take out the microSD card, I can get it to bootloop the Nook logo again.

If I unplug the device, I can't get any indication it's on or not, even after pressing and holding the power and Nook keys together for 30s or more, then pressing power. Nothing happens.

I tried another microSD card. No dice.

What should I do?
[Nook HD, HD+ General] digixmax:
If your HD+ fails to boot on SDcard (with the screen staying dark for seemingly a long time), most likely the MLO or u-boot.bin files on your SDcard are corrupted (perhaps in the unzipping or copying process).

Also, make sure that the SDcard partition is Primary FAT32 and its partition ID type 0x0C FAT32 LBA
[Nook HD, HD+ General] leejasonsmith:
me too ! been running with cm11 as a comic reader and games machine for my son. Will I notice any improvements in upgrading to cm12.1? sometimes these things actually run slower with newer os I find. any thoughts anyone?
[Nook HD, HD+ General] coder.f:
USB host not working

Thanks for great instruction to PeteInSequim! I installed CM 12.1 Nook HD in 15 min. Only problem USB host is not working. I CM 10.1 I had before, I used USBHostSwitcher.apk by verygreen to turn on/off USB host mode, to connect USB flash and mouse.

Looks like CM 12.1 it has installed by default, see picture:

i.imgur .com/F24L64k.jpg (sorry, had to put space into URL cause new users is not allowed to publish URLs)

When I run it I see the same USBHostSwitcher:

i.imgur .com/ifEH3s4.jpg

But when I click on white square in center, I got message: "USB ID control file not found". See picture:

i.imgur .com/LGvEgTA.jpg

That's all. USB Host is not working. What I'm doing wrong?
[Nook HD, HD+ General] PeteInSequim:
I'm not getting any ideas about this other than the extreme one to investigate with Android Debug Bridge. I should mention though that there have been more than a few instances where the user's non-booting microSD card was formatted with a logical partition instead of primary. I use gparted to prepare the card, but others who use Mini Tool Partition Wizard have mentioned that it sometimes defaults to logical, which they failed to notice for a while.
[Nook HD, HD+ General] PeteInSequim:
I don't think you've done anything wrong, its just not working in the release you have installed. I'm at the 20151004 release and mine isn't working either.

The unofficial CM-12.1 that we're using is still deep in development, so such issues are to be expected. Have a look around the development thread; maybe there is some discussion about this.
[Nook HD, HD+ General] PeteInSequim:
I spent very little time with CM-11 and never used it for any heavy-duty apps. But I did feel a big improvement with CM-12.1. I suggest you go for it, but keep a backup of your CM-11 installation in case you want to revert.

And please let us know how this works for you.
[Nook HD, HD+ General] digixmax:
USB Host is not working on 10/18 release, see posts on http://xdaforums.com/nook-hd/develo...cm12-1-nook-hd-hd-2015-04-08-t3078260/page124 for more details.

---------- Post added at 11:41 AM ---------- Previous post was at 11:33 AM ----------

I just upgraded from CM11 M12 to CM 12.1 (10/18 release), my email, browsing and video streaming apps are all noticeably more snappy, so I think it's worth a try.
[Nook HD, HD+ General] coder.f:
Thanks, PeteInSequim, digixmax. Yes, in development thread some people report about the same problem. And looks like there is no solution for now...
[Nook HD, HD+ General] Scorchgid:
Hi so I've been trying to flash TWRP 2.8.7.4 using this guide

Currently I have a bootable recovery for CWM, and I have tried to flash TWRP, however I got a status 7 error. So I googled for a fix and found http://highonandroid.com/android-rom...ooted-android/ Did it again and now for this new install of TWRP it just states installation aborted. The photo linked shows both of these.

Also note that as your saw for status 7 my device doesn't have a name "This device is - "

Not sure what to do.

https://onedrive.live.com/redir?resi...nt=photo,jpg
[Nook HD, HD+ General] topazz88:
I'd have got rid of my Nook HD+ before now if it wasn't for the great screen and general quality feel to the hardware. I discovered this thread yesterday, the upgrade worked first time and now my Nook HD+ has been given a new lease of life. Many thanks to the developers and you folks who took the time and trouble to produce such an excellent CM 12.1 upgrade guide. Thanks again. :good:
[Nook HD, HD+ General] kenryandub:
Hi Folks, would anyone have a fix for this , please

Fairly sure it is hardware related, as I see this on cm12.1 and other previous Roms

Intermittent, approx 10 % of the time,

when i swipe the padlock icon to unlock the screen, it will not unlock, only option is to hard boot the tablet
[Nook HD, HD+ General] rumbbel:
Hi everybody,

just did the update on my NOOK HD+ to the 12.1 following the instruction and could do everything. But after the start with the 12..1 I get the error message "Trebuchet not working" and "Clock not working" any idea what I can to to get the NOOK running.
[Nook HD, HD+ General] digixmax:
Did you do a "wipe /data" prior to flashing the new CM12.1?
[Nook HD, HD+ General] phfoneman:
Was running CM 11 from last Sept

I thought I would give an update on my CM 12.1 upgrade experience using the OP's instructions. My hopes were to follow it to the letter all the way, but it seems that I am related to "Murphy" in some way, ALWAYS!! I did the clean wipe and factory reset and was able to load TWRP and CM 12.1 without issue. Then when I tried the GAPPs, I kept getting an error code 6. I don't recall the exact wording, but it was always the same. I tried older, newer, newest versions of "pico" Gapps only to get the same failure error to load. So, I went ahead and rebooted and went into TWRP without the SD card installed. Then installed the SD card and since it was not recognized, mounted it and then tried to install zip from SD. It flew like a kite on a windy day. That was a day ago and all so far is working very well. I'm not sure I see much improvement performance wise from the previous CM 11, but definitely no worse. I plan on giving this a try for about a week and then go back to my previous version to make sure my comparison is noticeable going in the other direction.

Thanks Pete for all your hard work and effort you put into this! No way would I have tried it without your assistance... john
[Nook HD, HD+ General] digixmax:
The OP's installation guide (page 7) says to use TWRP to flash Open/TK GApps.
[Nook HD, HD+ General] phfoneman:
Thank you, kind SIR!!
[Nook HD, HD+ General] kenryandub:
I tried to run "all 4" player a TV catch up service from Channel 4 UK

all player will not pplay, because it thinks the Nook is rooted

Can you confirm please if this ROM is pre rooted, I was under the impression it wasnt

Thanks

Ken

PS I didnt root the ROM
[Nook HD, HD+ General] digixmax:
No it's not (you'd need to flash a rooting package like UPDATE-SuperSU-v2.46.zip to root it).
[Nook HD, HD+ General] PeteInSequim:
You are most welcome! The problem that can trying to flash some GApps packages with CWM (such as open-gaps and tk-gaps) is that the installation scripts for these packages are sophisticated and thorough, and don't tolerate certain indiscretions in CWM. TWRP uses a proper approach, so we do what we must to get it on the Nook, then you can flash any GApps package you want.
[Nook HD, HD+ General] harryzee:
Many thanks from a 69 year old senior for those well laid out and foolproof instructions!

Process went like a charm which I greatly appreciated as I stopped rooting and replacing the OS on my digital equipment a couple of years ago.

My "old" NHD+ is now busily d/l the apps I had on my LG gPad 8.3.

Will be primarily using this via the Prestigio app as my ereader and for graphic novels/comics.

Now if only I could find a screen protector that could actually minimize reflections which is still the bane of using led screen devices.

The anti-glare screens simply don't address the reflection issue.
[Nook HD, HD+ General] mirktamas:
I have a nook hd+ with cyanogenmod 12.1 but the bluetooth mouse cursor dooes not appear!

The mouse fully works, not just the buttons but i can't see the cursor.

Do you have any ideas?

Thank you.

May help:

http://stackoverflow.com/questions/24863204/disable-mouse-cursor-inactivity-hide

(Which thread should I post this question?)
[Nook HD, HD+ General] ubdu:
Thanks for writing up this easy to follow guide; I wish devs would include installation instructions like this.

That said, during the CWM usage from the SD card at the beginning, the screen flickers every two seconds.

During the installations from TWRP, the screen is normal.

Then, upon booting CM12, the screen flickering returns. I'm not sure I can figure out why... I may have to go back to stock, which was normal also.
[Nook HD, HD+ General] rs899:
This worked a treat. Could have had the tablet up in half an hour, but somehow something went wrong with the first gapps. Tried a second download and they worked. This nook is a blast. Thanks Pete.
[Nook HD, HD+ General] harryzee:
I am having three issues with your upgrade. I can live with and easily work around all three, however...

1. Shutting the unit off using a quick press to bring up the power off menu, usually results in a reboot when Power Off" is selected. This happens about 90% of the time. My workaround is to hold in the power button until I get a black screen which does shut the unit off.

2. When starting the unit up or rebooting, the wifi will turn on no matter how I configure the Settings. My workaround is to have the Settings icon accessible on the home screen and just manually turn the wifi off.

3. Brightness level always returns to 50% when I start up or reboot. I generally readjust down to 40% manually.

Otherwise, absolutely no complaints with the excellent instructions, the easy process, and the resultant overall almost flawless performance.
[Nook HD, HD+ General] digixmax:
I have the issue #2, but not #1 and #3.

Did you do a clean install (wiping /data prior to flashing ROM and GApps)?
[Nook HD, HD+ General] harryzee:
Yes, but NOT the Dalvik.

Followed instructions as precisely as I could!
[Nook HD, HD+ General] digixmax:
I ran into issue #1 today -- twice!

---------- Post added at 06:32 PM ---------- Previous post was at 06:30 PM ----------

The"wipe /data" menu option also "wipes" cache and dalvik-cache.
[Nook HD, HD+ General] panamamike:
Install image and boot from SD card?

Nice instructions, are there any additional/alternate instructions that would explain how to install the ROM on an SD Card a la Nookie?

That way I can avoid making modifications directly to the Nook. Any help would be much appreciated.
[Nook HD, HD+ General] digixmax:
SD-based ROM uses a ROM image that is compiled specifically to run off SD card partitions. There is currently no such ROM image for HD+/HD for CM12, but you can find SD-based ROM images for some versions of CM11 in these forum threads http://xdaforums.com/showthread.php?t=2600572 and http://xdaforums.com/showthread.php?t=2583952 and also at https://iamafanof.wordpress.com/category/nook-hd-2/.
[Nook HD, HD+ General] pokeyboy:
Great Tutorial!

Hi PeteInSequim,

Thank you very much for taking the time to create this tutorial. This is one of the best, most comprehensive, tutorials I have come across, on all of the electronic forums that I frequent.

Installation was a breeze and everything went perfectly. I’m amazed at how well Lollipop works on that old tablet. The screen resolution is still great, which is why I originally chose the NookHD+.

I am having the power down problem that others have mentioned, but not your fault and not a big deal.

Thanks again for the great job!
[Nook HD, HD+ General] lmacmil:
I've been running CM11M12 on my HD for about 6 months. Not very happy with it, screen response is sluggish, sometimes takes 2-3 seconds to bring up the home screen. Sometimes the keyboard won't come up when I touch a typing field. Thinking about trying 12.1 based on the tutorial presented here (I am also a senior citizen and need some handholding for this kind of operation.) Anyway, would like to hear from anyone who has installed 12.1 to replace CM11M12 (or really any CM11 version). Do you like 12.1 better? Or is it not ready for prime time? FWIW, I use my Nook primarily for web surfing (with Chrome) and as a book reader using the Kindle app or Calibre Companion. Also use the NYTimes app regularly.
[Nook HD, HD+ General] digixmax:
I had upgraded from CM11-M12 to CM12.1 for the same reasons you cited, used it for about a month and have since gone back to CM11 nightly build 11/22.

In my experience, CM12.1 system/apps' response performance at its best is much more snappy than that of CM11 but at its worst is also much more sluggish, and its performance wild-swing can be quite frustrating.

Also, CM12.1 for the HD/HD+ is not officially supported and, more importantly, is no longer enhanced/maintained (its original developer has recently moved onto CM13), so any CM11 feature that stopped working on CM12.1 (e.g., USB Host) will remain so.
[Nook HD, HD+ General] lmacmil:
Have you found the CM11 nightly 11/22 build to be better than M12?
[Nook HD, HD+ General] digixmax:
I think the 11/22 build's is noticeably more responsive (but not anywhere near the responsiveness of CM12.1 at its peak moments -- the tablet was a joy to use!!!). I should note that I did a clean installation of 11/22 (i.e., doing a "wipe /data" prior to flashing the ROM and Gapps zip files) when I downgraded from CM12.1; you might want to consider doing a clean installation of the new build when upgrading from M12 even though in principle it should not be necessary to do so.

Potential performance improvement aside, a more important reason to upgrade from M12 is to get on a recent CM build which incorporated the security fix for the Stagefright security vulnerability (http://www.cyanogenmod.org/blog/more-stagefright).
[Nook HD, HD+ General] Lestwist50:
AARP member too.

Thank-you 4 the manual as a AARP member I salute u.