yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Q&A, Help & Troubleshooting] rtiangha:
Encrypted? If so, it wouldn't matter how much space you have free because as soon as the full-disk encryption operation completed, the internal map in the flash controller that keeps track of free blocks would think that there was no space left on the device (even though the OS and the file system would obviously report otherwise) and the only way to reset it once it gets to that point would be to reformat the file system (ex. Factory reset) which forces the flash controller to clear its internal map and start from scratch.

Either way, if your tablet is not encrypted and you're rooted, you could try to download the LagFix program from the Play Store and have it run fstrim, which would sync up the internal map of the flash controller with the current locations of free blocks of flash memory so the device doesn't keep slowing down trying to manually probe for free blocks every single damn time it needs to do a write operation. You may have to do it every once in a while as that internal map slowly fills up again though (the pro version lets you set a schedule). Theoretically, from Android 4.3 and onward, it's built into the OS and the the OS is supposed to be able to do it automatically based on certain conditions (ex. Idle for a certain amount of time, plugged in or 80%+ battery on a certain schedule), but I found that sometimes it needed to be done more often and it's always nice to be able to run the command manually if needed, although to be blunt, there's no reason why the end user should have to resort to this in the first place. That said, I don't know if LagFix will work on Lollipop (never tried; no longer have a rooted 16gb N7 due to a replacement logic board but a busted USB port so I can't unlock my bootloader to re-root the new board) and the program looks like it hasn't been updated since 2013. One way to find out, though and that'd be to try it.

Switching to F2FS as the file system rather than ext4 might help as well (I really wish I could re-root my device to try it for myself). The speed increases over other file systems when using it on flash memory come from letting the flash controller deal with the disk I/O rather than having the OS schedule things. When you look at the bug and what causes it, it could be the communication between the OS and the flash controller that's the culprit. So using a file system that cuts out the middle man and makes the controller deal with scheduling all the I/O might mitigate the problem (after all, the flash controller works fine when there's lots of free space, it's only when it fills up to less than 3gb of space that the flash controller's algorithm to sync what the file system advertises as free blocks with its own internal map starts to screw up).
[Nexus 7 Q&A, Help & Troubleshooting] leebo:
I am not encrypted. I will try this LagFix app and report back, hopefully in next day or two. Do you recommend another factory reset first? Is been about three months.

XDA Mobile App
[Nexus 7 Q&A, Help & Troubleshooting] rtiangha:
If you want, although I'd try LagFix first to see if that's all you need. If you do go through the wipe, run LagFix every so often to sync things up (assuming it works for you or on Lollipop in the first place).
[Nexus 7 Q&A, Help & Troubleshooting] leebo:
OK, lagfix does NOT work on lollipop. It gives an error. When I can find the time maybe I'll try to convert to F2FS. Or else when I can find the money, try a new tablet.

Sent from a mobile device.
[Nexus 7 Q&A, Help & Troubleshooting] rtiangha:
Question: When you wiped the device previously, how did you do it? If you're using TWRP and use the Advanced options under format to manually wipe /data and internal storage, it'll just use the rm command to delete the files which won't reset the controller's internal map. You need to use the factory wipe option, which will use the mkfs.ext4 commamnd to format the partition (which is what you want). If you've been doing it the wrong way, then that might explain why you're still getting the lag despite having a lot of space still free.

Also, the built-in trim functionality (supposedly) only triggers when the tablet is plugged in or at 70 or 80% battery *and* has been idle for 2-3 hours so if you use the tablet a lot or keep it powered off when not in use, there's a chance that the automated task won't run (and since LagFix doesn't work in Lollipop until the Dev updates it to be compatible, then there's currently no way to manually trigger it). So if you haven't already, try leaving it in powered on and plugged into the wall outlet overnight while you sleep and see if it's better in the morning. Might be worth a shot if all else fails.
[Nexus 7 Q&A, Help & Troubleshooting] leebo:
Thanks. Yeah, I always leave it plugged in over night to make sure it's ready the next day.

I probably did do a factory wipe, but I'm not certain. Guess I'll try that again eventually.

XDA Mobile App
[Nexus 7 Q&A, Help & Troubleshooting] rtiangha:
Cool. Well, if all else fails, there's one last trick to try, which is to zero fill all the empty spaces on the drive to tell the controller that the empty space is indeed empty when it hits the "start probing the file system for empty blocks to perform the write operation" part of its I/O algorithm. You can do that yourself on the command line by using dd to create a giant empty file until the drive is filled up, syncing the file buffers and then deleting the empty file, and then sync the file buffers one last time. There's also an app that can do it automatically, which is just a GUI that calls dd, rm, sync, rm and sync in the background. I forget the name, but it's in the store and I think it has "secure" as part of its name.

I had moderate success with that method as things would speed up again once done, but would slow up again over time as the drive was used. Formatting the partition is preferable because it saves on write operations and thus, wear and tear on the flash drive but the downside is that you lose all your data. And zero-fill was the preferred method outside of re-formatting the partition until someone figured out the fstrim trick. You might be able to run the fstrim command from the command line if you're rooted since LagFix doesn't work anymore on Lollipop, but I forgot what the command line arguments are. Google could probably help with that.

So still a few more things to try before giving up. But I wonder if F2FS would work better. Let us know if you ultimately go that route.
[Nexus 7 Q&A, Help & Troubleshooting] bacardiandwatermelon:
You can run the trim commands from terminal. But I found increasing the minimum clock helped.
[Nexus 7 Q&A, Help & Troubleshooting] fredphoesh:
WOW same here, I updated from kitkat to 5.02 today and my god, this is TERRIBLE!!!

I keep rebooting in hope that SOMETHING will be better. I know this is an old tablet but I have a good mind to call Google tech support and complain about this abysmal ROM.

I did not do a wipe, just upgraded as you'd imagine that would be all one needs to do, it is a factory upgrade after all...

Some apps take forever to boot and then are inoperable because they can take a minute to respond to a touch (facebook seems the worst)

Others are very laggy but useable (like a cheap phone from 5 years ago).

I guess I have to try a factory reset/wipe.
[Nexus 7 Q&A, Help & Troubleshooting] leebo:
So just to update: I have been wiping the cache partition about every five days. It lasts about two to three days. I plan on waiting until I have money to get a different tablet before getting a different ROM, or converting to the newer file system (though that will probably be some time from now). In its current condition I can't even give this thing away!
[Nexus 7 Q&A, Help & Troubleshooting] irongamer:
Same deal here. When new the Nexus 7 performs great. I have a 2012 8 gb version primarily for platform testing. The interface is so slow now I've given up and just use my phone. The keyboard takes forever to show up. When you first load an app it takes forever and switching between apps takes just as long. The last Nexus and Asus mobile device I will buy for a good while. At least I can still use it to test an app and know that the app will run on a crappy performing device.

Nexus 7 2012 (8gb)

Android 5.1.1

I've done factory resets and it doesn't really help, maybe for a few minutes and then back to the slow clunker. Even after the reset the keyboard is slow as snot to show up.
[Nexus 7 Q&A, Help & Troubleshooting] leebo:
Just to update, I ended up using Wug's Nexus Root Toolkit to push 5.1 to my Nexus, then I did a factory reset. It had already downloaded 5.1 from Google, but I was desperate.

I had already given up and bought a Samsung Galaxy S 8.1 by then. It's now much faster. Because I bought the Samsung, I'm not using the Nexus very much, so I can't say for certain I cured it. It's worth a try however.

Signature edited to appease the OCD's
[Nexus 7 Q&A, Help & Troubleshooting] KawaiiAurora:
I would suggest installing Chroma 22/6/2015. It's very good since Android 5.1.1 fixes some memory leaks over 5.0.2 ^^ It runs perfectly :) P.S I wanted to sell or blow up my nexus with other roms so it's worth giving it a try ^^ I'd suggest wiping internal storage too after installation so you have a fresher feel ^^

Plz do it :3 You'll not regret it! The UI is pretty coolio too!
[MDA II, XDA II, 2060 General] OdeeanRDeathshead:
I had no audio at all coming out of my xda2 including thr ring. I pulled the device appart and manualy checked the speaker. The speaker still works. The problem must be with the chip. The audio in still works.

Dose anyone know if the xda1 has a compatible audio chip and speaker? I have 2 xda1's and would like to do a transplant.
[General Topics] Siddharth121:
Mod Edit: Please do not make "teaser" posts to drive traffic to other websites. Thanks!
[Nexus 5 Q&A, Help & Troubleshooting] tzutzyalex:
Hello everyone.

So, the wifi problem on my N5 goes back some time ago; it happened for the first time about 2 weeks after i got it, middle november i'd say:

i always keep my wifi connected while at home and sometimes it just refuses to send data anymore. The signal bar doesn't drop, but the data just stops working. I don't remember what i did the first time it happened, but it just started working as intented after a few days.(I was on 4.4.4 back then).

Now I'm on 5.0.1 and it had been working right for some time, until 2 days ago i unplugged my router then plugged it back it. Later that day I noticed the issue is back. I have absolutely no idea what to do about it and it is irritating as hell.

Did any of you guys experience this before? If so, how did you fix it?

Also, is it possible that this is a driver issue on the phone side? All my other devices work just fine on wireless.

Thanks!
[Nexus 5 Q&A, Help & Troubleshooting] boxcar8028:
you may also try forgetting your network and re-logging back in. also check the wifi frequency band and of course rebooting your router can’t hurt.
[Nexus 5 Q&A, Help & Troubleshooting] tzutzyalex:
I tried all that but with no success. I think the router might be the issue since it does have some glitches where it loses connectivity and it fixes after a reboot. I'll try with another router and report after.
[Nexus 5 Q&A, Help & Troubleshooting] Originalme8:
I have done a full factory reset on my phone due to this issue, and it still happens. It doesn't just happen at home either, it happens everywhere I go. I am assuming at this point that it is a bug in 5.0/5.0.1 and hopefully it will be fixed in 5.0.2 (if the N5 ever see's this update).

If anyone has had any luck with this bug, please let me know.
[Nexus 5 Q&A, Help & Troubleshooting] stirbot:
I'm having the same issues. I'm now on my 4th router in as many months and I can't figure this out after testing just about every possible configuration of channels, frequencies and settings. We have about 10 devices connected in my home and the Nexus 5 is the only device with this problem. I'm at the point now that I just use LTE at home.
[Nexus 5 Q&A, Help & Troubleshooting] christopherrrg:
Yeah it's a 5.0.1 issue, if you've found your way to XDA you should try a custom ROM. Most are branched from the aosp 5.0.2 commits.
[Nexus 5 Q&A, Help & Troubleshooting] chrisinsocalif:
Did Lollipop rid the wifi options of "wifi optimization" and "avoid poor connections?" I used to keep those options unchecked for a more stable wifi connection.
[Nexus 5 Q&A, Help & Troubleshooting] tzutzyalex:
But I had this same problem on 4.4.4 for a little while, that's why I was inclined to think it was something to do with my router.
[Nexus 5 Q&A, Help & Troubleshooting] christopherrrg:
Ahhh okay, yeah it very well could be.

I just had to replace my logic board due to faulty wifi, I got the always 'WiFi turning on' bug.
[Nexus 5 Q&A, Help & Troubleshooting] CoolRaoul:
That setting checkbox was missing in advanced wifi settings since 5.0 (and the option was forced to "on")

According to this post this has been fixed in 5.0.2:
[Sony Xperia M2] tulipanko:
Hello!

I'm having a issue of crackling sound on play back and then loosing a second or so of sound. This started after 4.4.4. update.

I have problem with music after update on 4.4.4. Kitkat. Every time i play music in Walkman or Poweramp from sd card, music short stop and than play again, like short break 0,5 sec. When i play music from internal memory of phone is everything ok, music play smootly. Micro sd card is Sandisk UHC-1, write 20 MB/s. I try format microsd, another microsd, repair phone over PC Companion, still the same. Please fix it... I bought Sony M2 for surfing and listening music and now i cant enjoy in music.

When i put my microsd into other phones everything works fine. When i put any other microsd in my phone, music stops shortly.

Whats wrong? Thank you very much!
[Sony Xperia M2] henrylim96:
I also having the same problem with you. But i moved to internal memory card, try another Music App (including, walkman and google play music) , turn off equalizer, turn off stamina mode, turn off xloud, turn off wifi, turn off cellular, turn on flightmode, try internal speaker and wired earphone, etc... BUT THE PROBLEM STILL THERE... BUT I NOT ONLY HAVING SHORT BREAK, I HAVING A LONG (10-30SEC) STOP :(
[Sony Xperia M2] DanielFlorin:
We have the same issue. How can I resolve without moving music in internal memory or to use another player?

Music stop 0,5-1 second.

I have this Micro Sd card http://www.adata.com/index.php?action=product_specification&cid=7&piid=178&lan=en

I use latest Walkman + latest Viper4Android FX.

How to fix this problem ?
[Sony Xperia M2] DanielFlorin:
FIX !!!

Add this line in buil.prop

tunnel.decode=false
[Sony Xperia M2] tulipanko:
My phone is not rooted. Can i edit this without root?
[Miscellaneous Android Development] Cybercom684:
Heyy Guy's I have a nice Rom Ported from the Symphony W72.

It's ColorOS JB 4.2.2 but i don't can Test it...:crying:

I don't have a recovery or a wrong recovery. i flashed a recovery with CTRv2.4 and now i become a Black Screen ...than it boot normaly.

Can someone help me? please mail me a backup from the right recovery please. ps sry for my bad english.

Download link and screenshots are Online in the next 7 dayz. ;)
[Galaxy Note 3 Q&A, Help & Troubleshooting] Stuj79:
I currently have 2 CSC's on my Note 3. XSA (Australia) and BTU (UK). I want to get rid of XSA and just keep the BTU. I have just rooted my Note 3 (successfully) but am still unsure on how to get rid of the unwanted CSC. Does any one know what happens if I flash my phone with the FW file in the CSC tab instead of the AP tab? Or does anyone know of a better way to do this?

Thanks.
[Galaxy Note 3 Q&A, Help & Troubleshooting] Joku1981:
Install this APP and you will know your REAL CSC (pic attached). Go to Sammobile.com and download, unzip and flash the latest firmware via ODIN.
[Desire 820 Q&A, Help & Troubleshooting] subinoy.bose:
Dear Sir,

I have followed all the steps but still not rooted my htc desire 820 dual sim

http://xdaforums.com/desire-820/general/htc-desire-820-root-easily-t2913064..............this link I have followed.....

but didn't sucess.......

plz....help...Sir

HTC Desire 820 can be easily rooted with few simple steps.

I am not responsible for your warranty loss or device not functioning properly.

Steps

1] Unlock Bootloader if you don't know how to do it visit this page

2] Download TWRP Recovery from here

3] Download Super Su from Here and transfer it to your device

4] Reboot to Fastbboot mode using Volume Down and Power Key

5] Connect Phone to PC

6] Extract files from Recovery.zip in one location and simply click on flash-recovery.bat

7] After Step 6 is finished Using volume keys navigate and select recovery option and go to recovery

8] After rebooting in recovery select Install zip > and selecting supersu.zip transferred in first step to obtain root access.

9] Reboot

Very much urgent.......plz. reply...........
[Desire 820 Q&A, Help & Troubleshooting] mukulatri:
Try thishttp://xdaforums.com/attachment.php?attachmentid=2784451&d=1402084843
[Desire 820 Q&A, Help & Troubleshooting] ypkonline:
Please let us know what is the exact message your getting are you not able to get to Recovery ???

I have been able to successfully root my device by following the steps outlined did not face any challenges hence wanted to check.
[Desire 820 Q&A, Help & Troubleshooting] Asifahmad555:
Same Probleam here pls help me

I AM SUFFERING FROM SAME PROBLEAM.

i am using desire 820q.

bootloader unlocked.

but when i enter in recovery then that says entering recovery then come back.

pls help me...
[Desire 820 Q&A, Help & Troubleshooting] tah3r:
problem with htc 820q root

I'm following this instruction and could not root my device,

My HTC 820q is unlock but when I want read SuperU.zip from Sd card at fastboot>recovery my mobile goes to restart and procedures been uncompleted.

Please help me, is this instruction only for HTC 820?

How we can root HTC 820q?
[Desire 820 Q&A, Help & Troubleshooting] mukulsatri:
http://xdaforums.com/desire-820/general/htc-desire-820-root-easily-t2913064
[Desire 820 Q&A, Help & Troubleshooting] 尚雷諾:
Well I have the same issue, recovery looks installed after pressing power button to launch it goes to a screen and go back almost instantly on fastboot screen. I also tried last version of framaroot, does not help either... just get a failed message
[Desire 820 Q&A, Help & Troubleshooting] T0ark:
Hi there, let's go step by step without "shortcuts" that are typically working on PC/WIn.

1. Unlock bootloader of your phone at HTCdev[dot]com [replace 'dot' with . - sorry for confusion I haven't earned reputation to post external links yet]. All necessary tools (fastboot) will be provided to download during process as well as necessary instructions. You need Windows/Linux or OS X computer to complete this step.

2. Download custom recovery .img file and save it to same directory you have fastboot files (e.g. from step 1) on you computer

3. Start phone in fastboot mode (mind fast boot option in Power settings must be unchecked if you using VolDown [-] start option (not necessary if you use adb reboot bootloader). Battery must be charged over 10% (I suggest 30% to stay secure); connect to computer (phone shall display Fastboot USB)

4. Navigate command/terminal window on your computer to location of recovery image file from step 2 (fastboot files must be there or have a correct path specified).

5. On computer terminal window run command: fastboot flash recovery filename_of_recovery.img . Red section must be exact custom recovery file name.

6. You'll get some communication in terminal. If completed OK will be among them, if failure, there will be FAIL with description of reason (e.g. low_power). If only "waitng for device" dislays, check connection with phone.

7. Navigate phone to HBOOT, then select recovery. If recovery don't start, check step 1 and restart from step 3. If only icon with red ! appears, it means you have stock recovery installed. Please verify from step 1.

8. Once custom recovery is installed and working, use it to flash SuperSU or any other superuser app (must be flashable .zip to be applied). Install just 1 root application, to avoid problems. At this point, you may consider flashing busybox also if you plan extensive file modification, but it's not necessary for root. For any sake, clear cache befor restart.

9. Restart the phone - you shall view SuperSU application or any other superuses app you've flashed i step 8.

Hope now works.
[Desire 820 Q&A, Help & Troubleshooting] 尚雷諾:
Thanks for your answer, I have to say I properly unlocked the phone so I do not think there is a way I messed up with this step as when I start bootloader it clearly shows on the top of the screen ''UNLOCKED".

When I flashed recovery on my phone I had no errors prompted or any message of failure. The process went well until a success notification.

Now when I start my phone into bootloader I repeat, I clearly see that recovery has been installed but when I attempt to start it then I'll be almost instantly brought back to the bootloader screen... now I started to wonder if... if an update of android could cause this kind of issue? The point is my phone is using android 4.4.4 and not the factory version 4.4.2. I remember having updated my android version which was perhaps a mistake as this phone is not very old and I was planning to root it in the next days... Now I'm not expert just try to figure it out.

I tried different system to auto root via different apps, some using the PC some using directly the phone, I never get any success...
[Desire 820 Q&A, Help & Troubleshooting] T0ark:
Ok, please try twrp from Original Android Development tread (it works for me, mind, I'd question it's stability) or Philz recovery (sorry, I found only Chinese, but it's for verivication only: h...ps://drive.google.com/file/d/0BygOvRquk4z8S05kRC1XMXdSbXM/view?usp=sharing - please adjust tt in address - rookie rules).

I'd suggest test running from Fastboot: fastboot boot custom_recovery.img - replace with actual file name from directory you're running terminal.

This shall verify if it's problem with recovery file or any remaining protection...
[Desire 820 Q&A, Help & Troubleshooting] 尚雷諾:
Does having S-ON bother? I was also wondering about that but all tutorials I found no one mentions anything about the S-ON or S-OFF thing.

But I do have a S-ON under UNLOCKED
[Desire 820 Q&A, Help & Troubleshooting] Asifahmad555:
what is stock recovery.img name

i dont know what is the real stock recovery.img name.:confused::confused::confused:
[Desire 820 Q&A, Help & Troubleshooting] tah3r:
htc desire 820q dualsim

I can't root my htc desire 820q by this method, is any alternative way?
[Desire 820 Q&A, Help & Troubleshooting] naeem151480:
I just root my phone with same procedure but my phone still show s-on..... How can i s-off my phone.....
[XDA Assist] fatoulas:
Hi .. I have upgraded my phone and I have the version of "Hanics v3" .All So far so good .. I have a problem when I go to go to hidden settings to adjust the proximity. Writes connection problem or invalid MMI code. I have tried almost everything I have found other solutions like nothing .. (with '', '', apps klp) knows someone something more; Thanks ..
[XDA Assist] :
Hi

XDA is an international site and has chosen English as it's language of choice. Please translate into English with Google translate or something similar and ask your question again.

Thanks!