yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Original Development] AgusL:
I installed 07/31 build. I didn't notice improvements from the previous build that was months older. Sometimes it runs like a charm and sometimes it is slow as hell... Spotify slows down a lot my performance and Chrome too. Imagine when both app are running at the same time haha
[Nexus 7 Original Development] C--Mon:
Did anyone know if this ROM supports the F2FS Filesystem? And if yes, for what partitions?

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[Nexus 7 Original Development] Vladimir2k9:
yes. For /data and /cache
[Nexus 7 Original Development] C--Mon:
THX, I will give it a try ;)

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[Nexus 7 Original Development] C--Mon:
Mhmm, for me this ROM (CM 12.1) get's extreme laggy from time to time. Even my old Galaxy Tab2 7.0 with CM 12.1 is faster in most cases... :(

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[Nexus 7 Original Development] Trafalgar Square:
Can confirm that on my Nexus 7 with newest Nightly.
[Nexus 7 Original Development] n1kolaa:
thanks for promoting my kernel. defrents with this and official is:

my is more updated with nvidea sources, aded hardboot and f2ffs.

its build with cm12 sources and compiler.those are for relases builded by me.
[Nexus 7 Original Development] TheYar:
What sort of boot times are people getting the first time? I've been going about 25 minutes now and I'm debating bad flash / reflash vs. patience.
[Nexus 7 Original Development] joaopaulo_:
Do a clean flash. First boot take only 10min to me.
[Nexus 7 Original Development] TheYar:
I figured out the problem (should have realized from the start).

A clean install includes formatting all partitions back to ext4. If you've got partitions on f2fs, the CM flash will result in an endless boot. A previous post here was a little misleading on that.

I flashed a different kernel and it booted up fine.

Alternatively, I assume I could have formatted data and cache back to ext4 instead.
[Nexus 7 Original Development] fosco_:
Sorry i forgot to mention i'm using M-Kernel a73 for f2fs support
[Nexus 7 Original Development] Rafase282:
I guess native support is at hand now?

http://review.cyanogenmod.org/#/c/84604/
[Nexus 7 Original Development] timedroid:
That's for support in recovery (CWM).
[Nexus 7 Original Development] stupidy:
Read the section in OP labeled Instructions, coming from another ROM ie stock, you need to factory reset, you have not wiped your data partition. That is why you have that error.
[Nexus 7 Original Development] andyrtr:
It would be nice to see official CM12 able to run an ALL F2FS setup.

Coming from Carbon ALL F2FS I had to go back to stock google rom to fix partitions. A full wipe wasn't enough here. Now I'm on CM12 with ext4 waiting to reflash with All F2FS again.

---------- Post added at 11:01 AM ---------- Previous post was at 10:56 AM ----------

Q: I don't receive any notification about new available nightlies to update. Is this service not yet implemented? I'm downloading and flashing them now via recovery every few days by hand.
[Nexus 7 Original Development] Reptilez_DK:
Does the built-in update work for anyone ? All I'm getting is a: "no new updates found".
[Nexus 7 Original Development] stefandi:
A big thank to all cm guys and to the device maintainer.

Installed the rom and being very pleased with your work!

I can confirm the previous posters regarding f2fs and updating.

Updating does not really work: i am on 0108 and do not get the latest 0110 offered.

My story regarding f2fs:

Using twrp 2.8.3.0

Did a backup of apps using titanium backup

Did a full wipe including /data/media

Converted /data and /cache to f2fs in twrp

Installed from an usb-stick: CM12, PA-GApps 501, SuperSu 2.40

ROM did not boot for 25 Minutes (due to f2fs i suppose)

Restarted into recovery and installed M-Kernel a73

ROM booted within ~ 6 minutes

Restored apps using TB and copied my media files to the device again

Running fine!!!

Regards, Stefan
[Nexus 7 Original Development] 19dragon98:
Im uploading ROM F2FS but only data and cache are F2FS so i need to try more... if anyone want test i'll put link at the end of upload :D still great ROM also if not Fully ALL-F2FS ;D

https://www.androidfilehost.com/?fid=95887005526789832
[Nexus 7 Original Development] westenthor:
well done job

used cwm 6.0.4.3

no probs during flashing (setting time ~ 7 mins)

rom runs

so far so good

... came from stock 5.0
[Nexus 7 Original Development] uphall:
Easy Peasy.

As per last post, followed instructions and seemed to be much like flashing any other rom.

Came from Slimbean without a hitch, connected to Play Store and updated apps.
[Nexus 7 Original Development] vikirules26:
Hello thanks for awesome work on official cm12. i am coming from Freakslim Lollipop ALL F2FS ROM and have Multirom v30 TWRP installed. i want to try the cm12 nightly. When i flashed it alongside rom it showed updater binary error. What do i do to make cm12 f2fs compaitable and install it as secondary rom along the primary Slim ROM.
[Nexus 7 Original Development] The Letter M:
i dont know how about you would you go about make CM12 f2fs compaitable.

but to install in it as a secondary rom, follow the link bellow. hopefully Multirom devs will sort that out, cause i think this is not a rom problem but a Multirom problem. i might be wrong tho.

http://xdaforums.com/showpost.php?p=57469293&postcount=106.You
[Nexus 7 Original Development] csd6420:
No full OTG support? it can't detect my USB disk...

This USB disk at CM11 is OK...

cm-12-20150111-NIGHTLY using M-Kernel a73

/system ext4

/data f2fs

/cache f2fs

It need to use "Nexus Media Importer v4.5.2"...
[Nexus 7 Original Development] stalag:
Do they finally support fstrim on encrypted volumes with the Nexus 7 kernel and Android 5.0/CM12? This has been a persistent aggravation for this device. We can get fstrim or encryption but not both! Absolute madness. I guess I can convert cm11 to f2fs to increase performance but that should not really required if they would just support fstrim properly. I am dreading the move to 5.0 if it will render my encrypted device useless!
[Nexus 7 Original Development] mrpkarthik:
Unable to ROOT using CF Auto Root ..

Anyone please help me to root..
[Nexus 7 Original Development] Reptilez_DK:
If you want to use the built-in superuser, you need to enable it in development settings. Disable/re enable if it is already enabled. :)

Otherwise you could flash SuperSU from recovery. Search the forum for "SuperSU flashable" and decide if you want stable (2.40) or beta (2.44). Beta works fine for me. ;)
[Nexus 7 Original Development] RonnyMegane:
Hi,

after formatting data and cache with f2fs and installing cyanogen my nexus 7 was blazing fast, i got good random write speeds at androbench. but now, only a few hours and installed apps later, I am back at the crippeling 0.2MB/sec random write speed.... and android is partly sluggish again. Does someone know what went wrong?
[Nexus 7 Original Development] Drake008:
Do I need to compile 12.1 gapps or can I still use the gapps for 12 from the CM site?

---------- Post added at 04:17 PM ---------- Previous post was at 03:42 PM ----------

Seems that it works.

But when I want to install apks via Total COmmander it takes ages even for a small 2 MB apk.
[Nexus 7 Original Development] AgusL:
I also have that problem since the first cm12 builds. Write speed is extremely slow and lags everything. I even experience sound freezes when listening to music and switching to another app.
[Nexus 7 Original Development] C--Mon:
I already switched to Rastapop ROM now, which has a much better performance. Cyanogenmod was sadly just unusable in most cases. But I realy miss some of the CM features there :(

So, maybe someone of you already gathered some log files and can open a bugreport on cyanogenmods jira for our device? Or is our device dead and we don't have an active maintainer anymore?

If nobody of you have logs, I will try to get some by my own and open a bugreport, after I come back from holidays.

Hopefully someone can make a working Cyanogenmod for our device again :)

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[Nexus 7 Original Development] dabl8:
Your performance problems are likely exacerbated by heavyweight third party software, so it's unfair to say that CM itself is unusable. I find it to be quite usable but I use F2FS and not Gapps. We might even be lucky enough that somebody offer to maintain it based on the forthcoming Android release which is reportedly focussed on performance over features.
[Nexus 7 Original Development] C--Mon:
I used it with F2FS and pico gapps. Problems are not caused by third party apps. The problems occure to me after some time, even on a clean install.

IMHO it seems that CM is just not well optimized for our device.
[Nexus 7 Original Development] gmsalomao2:
DELETED
[Nexus 7 Original Development] chall32:
Anyone else getting choppy audio whilst watching a movie at the 1 hour, 1 hour 15, 1 hour 30 mins mark?

By choppy audio, it sounds like the audio has gone underwater and all bubbly sounding... Workaround is to quit movie app, relaunch and resume movie where you left off.

Quick look in logcat when audio is choppy:

W/audio_hw_primary( 133): out_write() limiting sleep time 2147482635 to 23219

W/audio_hw_primary( 133): out_write() limiting sleep time 2147467760 to 23219

W/audio_hw_primary( 133): out_write() limiting sleep time 2147452884 to 23219

W/audio_hw_primary( 133): out_write() limiting sleep time 2147438190 to 23219

etc,etc,etc

Quick Google and possible patch in last post here: https://groups.google.com/forum/m/#!topic/android-x86/HkzmTcr6eOY notice they specifically mention grouper in that thread too.....

Certainly the setting of "kernel_frames = 0" is missing in the if statement when looking at CM12.1 source here: https://github.com/CyanogenMod/android_device_asus_grouper/blob/cm-12.1/audio/audio_hw.c, line 709... I think!!!

Unfortunately I don't have the facilities to compile and test this patch myself... [MENTION=2879446]Thömy[/MENTION] [MENTION=2238942]zyan[/MENTION] what do you think? How easy to compile just affected file(s) with this patch? I'm more than happy to test!

Or am I reading this all wrong??? :confused:
[Nexus 7 Original Development] fadern:
+1

I have the same problem.
[Nexus 7 Original Development] AgusL:
+1

I hace audio problems as well, but when listening to music. I posted about it un this thread no long ago.
[Nexus 7 Original Development] Reptilez_DK:
[MENTION=2633638]Ziyan[/MENTION] ;)
[Nexus 7 Original Development] roach9:
Where can I find a slim GAPPS to flash? Hate the one recommended.
[Nexus 7 Original Development] Reptilez_DK:
I'm using these http://xdaforums.com/showthread.php?t=3116347 (pico)
[Nexus 7 Original Development] gmsalomao2:
Latest nightly is ok?

How's the latest 09/17 nightly?

Good performance? No bugs?
[Nexus 7 Original Development] :
Why 09/17??

Go for 09/21!
[Nexus 7 Original Development] gmsalomao2:
Because my post is from 09/17.

How's 09/21 build performance?
[Nexus 7 Original Development] dookie23:
I am also seeing this issue. I am not sure what is causing the write speed to slow down but this seems to be affecting all Lollipop roms, including stock. KitKat roms, on the other hand, the lag is almost not noticeable. From time to time, the lag on Lollipop is just so bad that I am not able unlock the lockscreen. I hope the devs can figure out if there is a way to improve this.
[Nexus 7 Original Development] frankusb:
Root and then install Trimmer and set it to run twice a day.
[Nexus 7 Original Development] gmsalomao2:
How are the latest nightlies? Any performance improvement?
[Nexus 7 Original Development] gmsalomao2:
Well. No one replied, so I decided to update.

09/24 build

Great performance. Still needs improved, but it is a lot better then the previous builds. Thank you developers!! Nexus 7 with a new life!
[Nexus 7 Original Development] chall32:
Is anyone using L Speed http://xdaforums.com/android/software-hacking/tweak-l-speed-v1-0-02-02-2015-t3020138 on this ROM?

I had gone back to CM11, but I've restored my CM12.1 TWRP backup (01 Sept 15 Snapshot) installed L Speed and kicked it off (I think) with the settings options as per attached screenshot. I mainly use my N7 for streaming and Lollipop's NuPlayer seems to play so much better with Plex than KitKat's awesome player.

Anyway, so far so good, but that's always the way with 'L' ROMs on Grouper.... :eek:

Is anyone else running L Speed on CM12.1 on Grouper / N7? If so what options do you use?
[Nexus 7 Original Development] gmsalomao2:
Any news on recent builds?
[Nexus 7 Original Development] Dr0idG00di3:
Hey, can anyone here take me to a Kernel wich has Double Tab to wake ?

I use a Nexus 7 2012 32GB with CM 12.1, THANKS a lot !!
[Nexus 7 Original Development] :
Is it just me, or is battery life with the snapshots much worse than with nigthlies for everyone?
[Nexus 7 Original Development] frankusb:
Even with fstrimmer installed and running twice a day, I still found that the tablet was running out of erased flash. I finally just added the discard option back to the mount options. This can be added to the ext4 superblock without changing the ROM.

As root:

tune2fs -E mount_opts=discard /dev/block/platform/sdhci-tegra.3/by-name/CAC

tune2fs -E mount_opts=discard /dev/block/platform/sdhci-tegra.3/by-name/UDA

To remove:

tune2fs -o^discard /dev/block/platform/sdhci-tegra.3/by-name/CAC

tune2fs -o^discard /dev/block/platform/sdhci-tegra.3/by-name/UDA

The superblock options are only parsed on reboot so after changing it, a reboot is require to take effect.
[Nexus 7 Original Development] dookie23:
Any noticeable performance gain from using discard?
[Nexus 7 Original Development] frankusb:
To me, it results in a more consistent experience. I have not run benchmarks but discard should slightly degrade performance when TRIM is able to keep erased flash blocks. What I found is that Lollipop writes more than KitKat did and uses up the erased flash blocks before TRIM has a chance to run. Using discard avoids the massive slow downs you hit when you run out of erased flash blocks.
[Nexus 7 Original Development] dookie23:
Thanks [MENTION=3771488]frankusb[/MENTION]. Are you using F2FS or Ext4? I tried F2FS + LP rom and while the tablet ran very smoothly most of the time, it ran horribly slow sometimes. I am not sure if "discard" can be applied to F2FS and whether this optimization would give me better performance.
[Nexus 7 Original Development] frankusb:
I tried f2fs and experienced file system corruption as did a coworker so I am currently using ext4.
[Nexus 7 Original Development] C--Mon:
I also switched back to latest CM11 snapshot now. Everything runs much more fluid and is much more fun to use there. Compared to this, sadly every lollipop Rom I tried for N7 was crap. No matter which tricks I used to make them perform better :(

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[Nexus 7 Original Development] droid_1989:
Anyone know where I can find the latest bootloader?
[Nexus 7 Original Development] shawnbrennan55:
https://developers.google.com/android/nexus/images
[Nexus 7 Original Development] dbrickg:
google play services has stopped

just installed latest nightly (10/16) and open gapps (nano, same date) and I'm getting "Unfortunately Google Play services has stopped" every 10 or 20 seconds. Checked md5 sums of both and even reinstalled. Anybody else getting that? I'm going to restore to previous backup....

I take that back, it's more like every 2 or 3 seconds :( It took me several tries before I could even get into recovery to restore previous backup
[Nexus 7 Original Development] Reiven89:
The problem of this tablet is that after abit of time it becomes laggy with every rom i use......using fstrim fix the problem but why this happen?????
[Nexus 7 Original Development] adeelraj:
U should use f2fs roms

Then it will not be slowed down after sometime
[Nexus 7 Original Development] shawnbrennan55:
Or downgrade to KitKat and keep ext4 for a smooth Grouper ?
[Nexus 7 Original Development] Licaon_Kter:
The second command yields an error on CM12.1:

u0_a59@grouper:/ $ su
root@grouper:/ # tune2fs -E mount_opts=discard /dev/block/platform/sdhci-tegra.3/by-name/CAC
tune2fs 1.42.9 (28-Dec-2013)
Setting extended default mount options to 'discard'

root@grouper:/ # tune2fs -E mount_opts=discard /dev/block/platform/sdhci-tegra.3/by-name/UDA
tune2fs 1.42.9 (28-Dec-2013)
tune2fs: Bad magic number in super-block while trying to open /dev/block/platform/sdhci-tegra.3/by-name/UDA
Couldn't find valid filesystem superblock.

Any idea?

UDA seems to be there though: https://imgur.com/cw1H1pW

Apparently I have APP mounted instead: https://imgur.com/yFlc4fi

10x
[Nexus 7 Original Development] Reiven89:
Im already on f2fs on data and cache :)
[Nexus 7 Original Development] frankusb:
OK, your /data is mounted on /dev/block/dm-0 instead of /dev/block/platform/sdhci-tegra.3/by-name/UDA. I'm not sure why that would be but I think you could substitute /dev/block/dm-0 instead of /dev/block/platform/sdhci-tegra.3/by-name/UDA in the tune2fs command.
[Nexus 7 Original Development] gmsalomao2:
Happy to see movement on this thread! I was feeling like the last grouper user on the planet hahah. How are the latest nightlies? Anyone tested?
[Nexus 7 Original Development] fadern:
Hi, I use it daily as a streaming client (bs-player and some Swedish tv-apps) and have no bigger issues. Bs-player works flawlessly (1080p) but streaming using tv-apps lags.

I'm using f2fs @ data and cache.
[Nexus 7 Original Development] frankusb:
Have you ever run a file system repair in recovery? Both a coworker and I wiped, formatted f2fs and put on cm12.1 snapshot. Within a week I found data corruption (for me Angry Birds refused to run, an uninstall and reinstall would fail), the file system repair failed for both of us. We've since switched to ext4 with no issues so far.
[Nexus 7 Original Development] fadern:
No bigger problems at all and I've been running f2fs since grouper got native support for it.
[Nexus 7 Original Development] gmsalomao2:
How are the latest nightlies?
[Nexus 7 Original Development] :
Great!
[Nexus 7 Original Development] !crazy:
Wouldn't say it won't slow down, but it takes longer I think with f2fs. I am on it (full, system, cache, sd) on last Kit Kat PA, and IIRC it uses to be faster, though I am not sure it is because of the file system, but I remember well the issue I had with N7, Galaxy Nexus too, when devices would become slow in general, and after fresh format they would get significantly faster.
[Nexus 7 Original Development] simsunas:
Am I only one whos tablet wifi doesn't turn off on screen off?

EDIT: started to work after latest nightly applied :)
[Nexus 7 Original Development] gmsalomao2:
But why would WiFi turn off automatically when you turn the screen off? Mine doesn't and I like that way.
[Nexus 7 Original Development] simsunas:
Because I set so in settings. It is called energy saving :)
[Nexus 7 Original Development] dbrickg:
cm-12.1-20151117-SNAPSHOT

Just downloading and installing the 11/17 snapshot with the latest opengapps nano....

Looks good so far, but it sure takes forever to optimize 129 apps....

Finally! And looks good, so far, after 2 seconds of testing :) I'll update as time goes by....

After a couple of hours, still looks fine. No system crashes. Nothing particularly notable, either: neither good nor bad
[Nexus 7 Original Development] gmsalomao2:
Is it at least fast?
[Nexus 7 Original Development] dbrickg:
"Fast"??? You've got to be kidding! This thing is so fast you don't even have time to get a cup of coffee between the time you touch the screen and the time it responds :(
[Nexus 7 Original Development] mondokat:
lol, so it's faster then? :p
[Nexus 7 Original Development] dbrickg:
Faster than what? It might be marginally faster than a glacier. But not by much. I don't think it's any faster than any of the nightlies. As I understand it, snapshots aren't really any different than the nightlies. They just pick a point and say, ok, this is fairly stable, so we'll name the next nightly a snapshot. I don't think there's anything special about the snapshots. They're just kind of frozen at a relatively stable point.
[Nexus 7 Original Development] C--Mon:
No, it still has the memory problems and gets sluggish from time to time. No difference to earlyer builds
[Nexus 7 Original Development] gmsalomao2:
Well, this was a precise and useful post hahahahha

Thanks!
[Nexus 7 Original Development] Reiven89:
Try the 6 November Nightly build, its pretty fast and stable for me, not that bad :)
[Nexus 7 Original Development] dbrickg:
I have hopes (not many) that cm13 will make it a little better
[Nexus 7 Original Development] simsunas:
Only Nov.6 turns off wifi on sleep. Later relases don't. So, it is eating battery like a pig...
[Nexus 7 Original Development] dbrickg:
Oh really? Even if you have "Settings / Wi-Fi / Advanced / Keep Wi-Fi on during sleep" set to something other than Always? That's discouraging.
[Nexus 7 Original Development] simsunas:
Yes. Even if set "Never". That's really disappointing...
[Nexus 7 Original Development] fran_xda:
I've lost root access after flashing 11-20 nightly, even if properly set in developer options...
[Nexus 7 Original Development] dbrickg:
well, darn, darn, darn! i left my 7 sitting on my boat about a week ago, assumed it would be fine. but if wifi has been on all this time, i imagine the battery is totally drained by now.

PS: stopped by the boat yesterday and my nexus 7 seemed to be just fine. Battery was at about 75% after a week.
[Nexus 7 Original Development] dbrickg:
Hmmm, I just installed the 11/24 nightly, and I've got root. Not sure if they fixed it since 11/20, or if there was some other problem for you.
[Nexus 7 Original Development] fran_xda:
There must be a problem for me, flashed 11/24 and no root yet. I think I'll wait for cm13 instead of further research, but this is weird, I just did the same process I always do, previously checking file integrity.
[Nexus 7 Original Development] dbrickg:
Have you installed SuperSU? I see that I've got it on my nexus 7. Not sure if I actually replaced the built-in su with it. But probably a quick search through this thread to see if other people are recommending it would be worthwhile
[Nexus 7 Original Development] dbrickg:
Speaking of which, has anyone seen any indication of a cm13 for our nexus 7's? I haven't seen even an alpha version anywhere, but I haven't been looking very hard.
[Nexus 7 Original Development] fran_xda:
CyanogenMod team said in their blog that cm13 would be ready for many devices in weeks.
[Nexus 7 Original Development] dbrickg:
That's for sure. The changelog list for cm13 devices is growing rapidly:

http://www.cmxlog.com/13/

But I haven't seen anything, or even heard any rumors, about the nexus 7 (2012)
[Nexus 7 Original Development] fran_xda:
I think that last 2 years I flashed new cm version during Christmas. So this year I hope I can keep the tradition. I'll be impatient if there is no update in that moment.
[Nexus 7 Original Development] mondokat:
the nightlies are staggered a bit for grouper, i wonder why builds for it are failing. are they changing something big?

---------- Post added at 04:03 AM ---------- Previous post was at 04:02 AM ----------

oh oops: http://www.cmxlog.com/12.1/grouper/

nothing changed at all, so no new build. No need to build if no commits...
[Nexus 7 Original Development] Licaon_Kter:
So the "always ask what app should be used to open a web link bug" will never be fixed since these will be the last builds and everything moves to 13.x where Grouper is not (yet?) invited?
[Nexus 7 Original Development] Licaon_Kter:
What? It's here: http://www.cmxlog.com/13/ or here: https://download.cyanogenmod.org/?device=grouper ? No? meh
[Nexus 7 Original Development] GtrCraft:
Maybe you should read the ''UNOFFICIAL'' part of the build name
[Nexus 7 Original Development] GtrCraft:
Here enjoy guys:

https://www.androidfilehost.com/?fid=24343351889232011

I found no bugs, glitches etc but please test it as well