yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Android Development] adstraylight:
I'm sure I once got out of apx by connecting the device to a PC, then pressing both volume keys and power simultaneously, and holding them until the Google logo appeared. This is the same key combination I use to boot to the standard bootloader when not connected to the PC btw.

I always thought that apx mode was there to allow direct programming of the firmwares etc via UART, but as with most things in life I'm probably wrong...
[Nexus 7 Android Development] tevil:
just installed, seems good! Thank you good suh
[Nexus 7 Android Development] Armin61:
hi

I installed latest build on my N7 and when I activate Super SU and allow Root access to Performnce cotrol I can see only three cores active and N7 starts to charge very slowly.

Any idea about this?
[Nexus 7 Android Development] Alex_Lyt:
Yes, you are right. You may enter and exit apx manually. The problem is that if you have corrupted bootloader, tablet goes to apx and you can not get it back.
[Nexus 7 Android Development] n3kf:
I'm finding that Chrome really can hang Grouper up pretty fast on this build (nothing new!). I've tolerated it, but looking for a good small browser. Any other good browsers out there that are not loaded with bloat and ads?
[Nexus 7 Android Development] heilbron:
You might want to give Brave a try!
[Nexus 7 Android Development] Alex_Lyt:
Forgive me for my perseverance, but can you tell me is it a chance to corrupt a bootloader and to get apx while flashing this build over 4.4.4?

The case is i don't have a pc and can not make a blob files backup (
[Nexus 7 Android Development] AndDiSa:
First, you need to update your recovery to TWRP 3.x if you don't have it already installed. Second, if I were you, I would do a nandroid backup before updating / changing anything of the configuration. So you are able to return back to the latest running configuration, but be sure your backup is working! Third, having a PC at hand you are much more comfortable in dealing with system updates ... that's only my two cents. You need to decide whether you are willing to take the risk.

You also need to check if you have already the correct bootloader version 4.23, if not you need to update the bootloader, too, but this I would only do using fastboot ...
[Nexus 7 Android Development] Alex_Lyt:
Bootloader and twrp are the latest. Backup is ready and checked. What scares me is that I've already killed one motherboard at the same conditions. Flashed successfully, but then tablet freezed and died forever. It took two months to get another mb, that is why I'm so scared. Pardon me
[Nexus 7 Android Development] Bakica:
Via browser is very light and fast
[Nexus 7 Android Development] n3kf:
AndDiSa. Even on the the July release, memory is slowly getting eaten up until the device either hangs or reboots. This happens much slower then in the August release, but I have been watching free memory and it slowly disappears. Sure smacks of a memory leak. It could be one of the apps I use maybe. I need to find some decent memory tools so I can easily see what's doing this.
[Nexus 7 Android Development] AndDiSa:
[MENTION=6824216]n3kf[/MENTION] I suppose this behaviour is due to a bug in calculation of free memory when zram is used. My latest build I posted here last week (not the one linked in the OP) has a patch for that included. I am on that version since more than a week now without any reboot. It still has lags from time to time but it recovers from that. I am still not happy with the ramp up speed after waking up from deep sleep, but probably this behaviour is also influenced by several processes suddenly trying to update their data over the network. After using the device for a few minutes everything runs fluently.
[Nexus 7 Android Development] adstraylight:
Intriguing, is the patch anything that can be implemented manually, or is it only something that works from source?
[Nexus 7 Android Development] SGH-i200:
Which Skype app version dou you tried? The newest on can not make video calls on my N7! :rolleyes:
[Nexus 7 Android Development] AndDiSa:
Unfortunately you need to patch the sources ...
[Nexus 7 Android Development] adstraylight:
Any further thoughts on moving to k3.4??
[Nexus 7 Android Development] quique2:
Battery drain

I'm using the Grouper 20170828 build and am facing extreme battery drain.

I had CM before (I think CM11) with excellent battery life. At first I was plagued with wakelock issues but after I manually disabled a lot of "keep awake" permissions, location permissions and turned wifi off during sleep, the battery would easy last up to 10 days in deep sleep/standby, maybe more, so I'm pretty sure the battery itself is fine.

Flashed Grouper 20170828 build using TWRP 3.1.1, wiped everything and did a completely new install following instructions, and used BeansGapps 7.1.x 20170725.

BetterBatteryStats seems to blame the NFC service. NFC is greyed out under my wireless settings and I can't change the setting to off.

See some screenshots. Not sure why there is a bar for "cellular network signal" if this is the grouper build. I haven't been able to get a full charge in the last few days (power affected by hurricane Irma) but you can see that it won't sleep when the screen turns off. Battery is lasting <1 day with screen off and high battery drain from "Android System" showing >1 day keep awake.

(sorry for embedding, I have <10 posts and can't link)

The issue has been happening even prior to installing any apps but since then I've only installed Netflix and a few other random things. Thoughts? I tried manually disabling the nfc wakelock using:

cmd appops set com.android.nfc WAKE_LOCK ignore

but this didn't do anything.

Thoughts?
[Nexus 7 Android Development] AndDiSa:
... if I had the time ... It's not only switching to 3.4, but the device tree needs to be adapted, too, :(
[Nexus 7 Android Development] adstraylight:
Oh, I was thinking you could add your optimisations on top of the UA ROM to create your own custom version, but I suppose it's not so easy.
[Nexus 7 Android Development] n3kf:
Was under the impression the latest build had issues. Moved to it today. Much, much better. Thanks AndDiSa.
[Nexus 7 Android Development] :
I want Android 8.X AOSP on Grouper

I want new version Oreo OS.
[Nexus 7 Android Development] DumF0rGaming:
then do it
[Nexus 7 Android Development] yanokashi:
Please no... Grouper is note device mentioned to hold newest Android builds.. That Marshmallow and now Nougat builds are build because people want them. For me there is no sense cuz of 1GB of RAM and very weak Tegra 3 so for me, last ROM which was running smoothly and perfectly was stock 4.4.4 KitKat :/
[Nexus 7 Android Development] :
I want September SMR.

Please release, September security update.
[Nexus 7 Android Development] 239:
Please find another place to pass the time!
[Nexus 7 Android Development] _tike_:
hi,

I want to install the pixel launcher.

What works better?, the original from google (install from apk mirror) or the open source "rootless pixel launcher"

Thanks :)
[Nexus 7 Android Development] JensM1973:
I installed the pixel launcher via the aroma package of opengapps. Just select the important stuff out of the package and remove the default aosp launcher.

The pixel launcher works via this installation routine perfectly on my device. The swipe to the Google feed works as well as the Google assistant.
[Nexus 7 Android Development] williamlaw:
I encountered same issue - battery drain.

But I haven't trace the root cause and rolled back to previous build finally.
[Nexus 7 Android Development] n3kf:
That's really weird. My battery stats look totally different. I am actually getting decent battery life on the 8/28 build. My awake time due to wakelocks is 1%. Have you tried disabling NFC to see what happens?

Whoops, see you can't turn off NFC. That's weird also since I can disable it on the same build.
[Nexus 7 Android Development] williamlaw:
Still drain even disaled NFC
[Nexus 7 Android Development] Bakica:
I use greenify, no battery drain issue with the latest patch.

Try wackelock detector, good luck
[Nexus 7 Android Development] williamlaw:
I also tried to reset / clean wipe then resintall but still encountered.
[Nexus 7 Android Development] nonoheran:
hi all

Thank s for that great work !!!

Got a little pb with browser .( try chrome and firefox )... i can t download anything . the app say : ccan t download due to no sd card !!! ???? any idees ?
[Nexus 7 Android Development] n3kf:
I had this and gave Chrome all the permissions it is asking for. That seemed to fix it. Go into Apps-Chrome-Permissions..... Makes no sense cause storage was already allowed, but now it works.
[Nexus 7 Android Development] nonoheran:
Got the same msg for all app that need to download .,.
[Nexus 7 Android Development] Bakica:
Go to settings, apps and force close every app that requires downloads, then permission, storage, turn it off and turn on again.
[Nexus 7 Android Development] criza:
https://xdaforums.com/attachment.php?attachmentid=3761904&d=1464187934 flash this
[Nexus 7 Android Development] JuGnO:
Need Help

I installed the 7.1.2 ota as per the thread start today

Everything went on smoothly on grouper

Installed the gapps mini as recommend in the first thread

Used supersu

Now the home button and application switch button do get clicked/touched as is visible through changing of the background of button but the press does not go to home screen or the app switcher

. It does nothing

Only back button is working
[Nexus 7 Android Development] topoldo:
Question

Hi all.

I've a question.

Has anybody tried to use the offline navigator "Here we go" on Nexus 2012 using this ROM?

I was able to use it until about one month ago using the July ROM version.

Then I moved to August ROM version and I wasn't able anymore.

So I went back to the July version, but I wasn't successfull anymore.

In the meantime "Here we go" was updated more than once, so my suspect is that now this app needs too much RAM and it is impossible to use it anymore with this ROM.

I'll be grateful for for any info/opinion on this subject.

Cheers
[Nexus 7 Android Development] ra_van:
Hello there.

I tested with the August build and a fresh install of Here We Go.

I dowloaded only a small offline map (arround 450 MB) and it worked without problems.

The route was also not very long, only 29 KM.
[Nexus 7 Android Development] flukeSG2:
I'm having the same issue a few others are having where after having with the Google Play Services have stopped responding. Followed the instructions to the letter. Went back did complete wipes again and reinstalled, still same result. I've checked the permissions of Google Play Services and by default nothing was enabled. So I enabled them and on the Play Store app, still no luck.

As a side not, not sure if it's related or not, but there are no wallpapers and I have a black screen after installing each time.

Edit: Ok, so this is going to sound stupid on my part. I guess I did not follow the instructions exactly to the letter. After installing the ROM, I rebooted the system and then rebooted into recovery and proceeded to flash the gapps package. So, this time I followed more closely and after installed the ROM I rebooted recovery itself and proceeded to install the gapps package. It worked, my own fault. Hope this helps anyone else who has similar problems.

By the way,

AMAZING ROM!!!

You have given new life to my old tablet and I thank you very, very much!
[Nexus 7 Android Development] quique2:
With regards to my prior post: I tried a bunch of things with Greenify, blocking wakelock permissions, different Gapps and more. Reflashed a completely clean install and nothing worked. I even tried some other grouper ROMs but most don't support Netflix downloading so I wanted to stick with this one.

Flashed 20170707 grouper build - Battery drain solved! The device now happily goes into deep sleep with great battery life.
[Nexus 7 Android Development] Fitz Creativ:
AOSP CAF vs AOSP

which of the following roms is more stable and/or faster???

[ROM][7.1.2_r33][NZH54D][Grouper|Tilapia][F2FS/EXT4]Android 7.x AOSP

OR

[ROM][AOSP-CAF][7.1.2_r27] Desolation [ROOTLESS][OFFICIAL][07/30/17]

:confused:
[Nexus 7 Android Development] n3kf:
You will probably have to try both and decide for yourself what works better for you.
[Nexus 7 Android Development] flukeSG2:
I couldn't say about Desolation, but for this ROM on a scale of 1 to 10 (10 being as fast as it was the day I bought it) this is definitely a 7 maybe an 8. As far as stability, 24 hours on and not a single problem.
[Nexus 7 Android Development] Sandroz84:
Exists an alternative kernel for this rom? The battery live is very low.
[Nexus 7 Android Development] AndDiSa:
Battery life depends much on your installed apps, device usage and battery health.

I am using the device mostly for reading news and browing the internet for about 60-80 min screen on time every day and I am generally recharging it on the third or forth day having still round about 30% of battery. Do you think this is a very low battery life?
[Nexus 7 Android Development] Sandroz84:
Yes, I'm sure.

With the old paranoid 4.4.x in the same condition (eg youtube 480p) the battery lasted a lot longer, infact during this normal use the cpu will heat up a lot compared to before, in stand by there are no differences.
[Nexus 7 Android Development] slybunda:
that would mean 60mins x 4 days thats 4 hours of screen on time and 30% remaining which is decent enough battery life.
[Nexus 7 Android Development] b4b4.4l1:
Message deleted

EDIT : My apology, turned out I was on another rom earlier. My bad :silly:
[Nexus 7 Android Development] AndDiSa:
Did you install the version from OP or the last version I posted about three weeks ago? The version from three weeks ago should show already some improvement the next version (I wanted to wait for an 7.1.2 update from Google but up to now there is none :() will still improve that behavior.
[Nexus 7 Android Development] b4b4.4l1:
My sincere apology, I was wrong. I was on another rom but I posted here on your thread :silly:

Anyway, I'm running the one from the OP as I thought it was the latest one. So, which one is better for now? :confused: I read back a few pages back and found the one you mentioned, but then there were some reports stating it was quite bad and you refering to flash back to June/July builds.

I've been trying like almost all Nougat roms available for Tilapia but none are useable IMO as most of them constantly freeze here and there, not just lags :crying:
[Nexus 7 Android Development] AndDiSa:
[MENTION=4815682]b4b4.4l1[/MENTION] unfortunately my Tilapia builds are broken for some reason and I do not have a device for testing :(

I'll try to fix it, but i am not sure how long it will take as I am using the device tree for Tilapia from [MENTION=6754437]millosr[/MENTION] and it worked fine until the July version. I am still not sure why the August builds do not work as comparing the changes I do not really see a commit which might be the reason for braking the build.
[Nexus 7 Android Development] mausbock:
[MENTION=4815682]b4b4.4l1[/MENTION]

In the last weeks I tried most of the 2017 builds for tilapia.

The builds from August all have no mobile network and are laggy on my device.

The one from July has freezes sometimes and is not super fast.

So I also tried the builds from April, May an June.

The performance from June version like that from July but without freezes.

It seems to me that the April build is the fastest one, but I got heavy battery drain once like March version and now I am on the one from May. It is faster than later ones for me and stable enough. Sometimes the device is rebooting when in deep sleep but not very often.

I use the N7 as my daily driver for reading News, Magazines, some Tapatalk and surfing using Chrome.
[Nexus 7 Android Development] Alex_Lyt:
How to make sure that gapps will fit into remaining system space?
[Nexus 7 Android Development] mausbock:
Simply use the Gapps package from OP and it will fit.
[Nexus 7 Android Development] Alex_Lyt:
But it is written there, that i have to make sure...
[Nexus 7 Android Development] pjcanales:
For grouper which one do you recommend since I can't figure out if your referring to latest good one on battery. I remember issue where something would cause it from take advantage the full charge capacity
[Nexus 7 Android Development] abhifx:
Flash SuperSu through recovery
[Nexus 7 Android Development] shaggyskunk:
[MENTION=2188693]AndDiSa[/MENTION]

Probably the Best 7.1 Rom that I've tried on my Nexus 7 2012!

Nice Work!!

Sent From My SM-N910W8 ??
[Nexus 7 Android Development] AndDiSa:
[MENTION=4351374]shaggyskunk[/MENTION] thank you very much.
[Nexus 7 Android Development] tpuserhp:
Is it still a requirement to use adb to install this rom now? One time twrp needs to reinstall after installing the rom and gapps from twrp. Thx.
[Nexus 7 Android Development] AndDiSa:
[MENTION=3692487]abhifx[/MENTION] How did you install Android Auto on the tablet? For me the app store is telling: "This application is not compatible!"
[Nexus 7 Android Development] AndDiSa:
[MENTION=5333182]tpuserhp[/MENTION] I do not expect so, because I removed everything related to recovery, but as I am updating always using fastboot I cannt guarantee 100%. Probably somebody else can report on that.
[Nexus 7 Android Development] adstraylight:
I flashed this ROM (7.1) via TWRP, no problems...
[Nexus 7 Android Development] tpuserhp:
I have carbonrom 7.1 installed. I then wiped caches, system and data in twrp advanced wipe. I then flashed this 7.1 ROM, pico gapps and SuperSU 3.78r4 from twrp. When I rebooted after flashing, Twrp said no os is installed. I might be missing some basic understandung of flashing rom. I looked at this ROM zip file and carbonrom zip file, I found the structure is different. Odd.
[Nexus 7 Android Development] shaggyskunk:
Which version of TWRP are you using - 3.0.2-0 as per the OP?

Did you verify that at least the size of the zip was correct?

As for the version of SuperSU - I'd use the v2.78 zip - I was coming from a different Rom as well - Factory Reset - Advanced in TWRP 3.0.2-0 - Manually Wipe System - Data and Caches - Flash Rom and Gapps 7.1 - Flash SuperSU v2.78 - Wipe Caches and Reboot.

Sent From My SM-N910W8 ??
[Nexus 7 Android Development] tpuserhp:
I'm using 3.0.2-0 of twrp. Size of zip is correct. Using 2.78 SR4 of supersu. My steps are same as yours except I did not do factory reset as I'm wiping system and data. Just odd about the no os message. Carbon rom is running fine for me. Thx
[Nexus 7 Android Development] adstraylight:
Your steps seem correct on the face of it, I would just add a couple of things.

Flash the zips one at a time, and watch the output of the console for errors.

Make sure /system is unmounted in the mount options of TWRP before each zip.

Follow the OP's guide to force systemless root.

As an extra thing, what I tend to do is make sure the ROM boots completely and runs fine before flashing supersu.
[Nexus 7 Android Development] tpuserhp:
My /system was mounted. After I unmounted it, reboot was ok after flashing rom and gapps. Thanks.
[Nexus 7 Android Development] abhifx:
i used apkmirror to get the latest version as in my country the version was very old.
[Nexus 7 Android Development] tpuserhp:
Not sure if it is the way I use twrp to flash the rom zip or not. But I found the parramod perf change on /sys/block/mmcblk0/queue/read_ahead_kb is not = 0. It contains 128 instead. I always like to change parramod parms a bit after bootup so it does not matter to me. But [MENTION=2188693]AndDiSa[/MENTION] might want to check to see if this change included. Thank you for a great ROM.
[Nexus 7 Android Development] :
I moved over to this ROM from the PureNexus one mainly because of the updated security updates - I was happy with the performance of PN.

However, I think I might stay with this ROM, it's performance rivals PN and I likes :good:

No major issues, apps sometimes crash but I can live with that. It's well cool being able to run Nougat on my Nexus 7! :o
[Nexus 7 Android Development] adstraylight:
[MENTION=2188693]AndDiSa[/MENTION] I've been thinking about my vague connection between surface flinger an the app crashes, and remembered an experiment that parrotgeek asked me to try a long time ago to see if transparency rendering/swiping performance could be improved by making the following service call in a root shell:

service call SurfaceFlinger 1009 i32 1

I'm not entirely (or at all) sure what it does, but it did seem to make transitions involving transparency a bit smoother on MM ROMs. My guess is that it somehow reduces the load on the cpu/gpu.

To cut a boring story short, I've tried this in Nougat (7.1), an get the following error in terminal:

CANNOT LINK EXECUTABLE "service": cannot locate symbol "XzUnpacker_Construct" referenced by "/system/lib/libunwind.so"...
#

I've asked PG about it, and he suggested it was a ROM bug, hence this post....not sure if it's worth looking into, but if there is a connection between surface rendering/transitions and the crashes, it may bear some scrutiny.

The reason I mention transitions is that the crashes always occur at a transition point, ie. when an app begins to open, or at an activity change within an app.

I've also noticed that once an app has spent some time in background it is far less likely to crash in my experience, so a kind of workaround for me is to start an app that is usually unstable, press the home button, and do something else for a while, before coming back to it.

EDIT: Found this, may be helpful?

https://android.googlesource.com/pl...ve/+/a45836466c301d49d8df286b5317dfa99cb83b70
[Nexus 7 Android Development] AndDiSa:
[MENTION=5333182]tpuserhp[/MENTION] I found some suggestions that 128kb performs a bit better than 0kb that's the reason I took 128. The rest of the settings is like parrodmod.
[Nexus 7 Android Development] tpuserhp:
Thanks for the update that you want to set it to 128.
[Nexus 7 Android Development] dooderooni:
I successfully installed this ROM this morning and would like to say thanks to the dev for their fantastic work.

I used the equally excellent Nexus Root Toolkit to install the zips and then to root the tablet. I've also installed the Pixel Launcher and the Google Assistant and both are working perfectly.

The only issues so far have been the camera not working with any Launcher app and the odd MTP crash, but that doesn't affect the ROM function.

The ROM is very smooth and runs as well as the stock 5.1.1 or the AOSP Marshmallow ROM I was using previously.

Great work ????
[Nexus 7 Android Development] humano:
I think it runs even better... very fluent.

I have just some problems with the pattern screen with the points.... It's difficult to get to it after sliding down.
[Nexus 7 Android Development] AndDiSa:
New release with September security fixes uploaded

Hi guys,

I've just uploaded the new builds. They are still based on android 7.1.2_r33 as Google seems to have abandoned the 7.1.2-branch in september :(

Nevertheless I've cherry-picked the september security patches manually.

Additionally there is a patch included to calculate free memory correctly when zram is enabled. Many spontaneous reboots were caused by this error. Since I am using the kernel with this patch I didn't had a reboot yet.

intelliplug is still included but currently disabled as I noticed some kernel oops ... this probably needs some deeper inspection.

the kernel is further prepared to support sdcard_fs. It'S not yet activated within the ROM but probably in one of the next releases ...

further performance improvements to deal with the lags which from time to time may occur

and last, but not least, I hopefully found the reason why the tilapia builds didn't work. If anybody would like to test ... ;)

... and as always: flash on your own risk ...

Edit:

Here are the links if you to not want to get them from the OP:

Grouper 20170923

Tilapia 20170923