[Q] Z2 Home and Recent Apps Keys laggy - Xperia Z2 Q&A, Help & Troubleshooting

hi i got a z2 this week and everything works fine just this one annoying issue. The home and recent apps on screen keys are laggy. Sometimes they work good, most times they lag. The back key is fine.
The phone shipped with 4.4.2 .314 and had the issue right out the box. I updated to 4.4.4 the same night and no change. I downgraded back to 4.4.2 and same issue. Did factory resets etc.
Is there any official word on what is causing this? I live in the Caribbean so sending this to a repair centre is out of the question. Just hoping it's a software issue that can be fixed.
Any help?

Repair via sony PC companion
I found the 4.4.4 update can bug a tiny bit and will slow down heavily, repairing should fix this

if i repair via pcc will i stay with 4.4.2?
i dont want it to update to 4.4.4

Downgrade via flashtool buddy then this problem will be solved

i already downgraded using flashtool.
i was on 4.4.4 and downgraded to 4.4.2. The issue is there on both firmwares.
should i try another version of 4.4.2? if yes, which build number??

okay so here's what i did
initially when i first got the phone it had 4.4.2 .317
i had done the ota update to 4.4.4 and i got all the
popular bugs; camera lag, low notification tones, call problems etc
downgraded bk to 4.4.2, keep in mind the lag has been here thru all this, no matter the firmware
so today i thought id try doing the software repair via pcc. This updated the phone again to 4.4.4. Just this time none of the previous bugs are there and i am happy to report the home key lag is completely gone. The recent apps key had a verrryy tiny lag sometimes but nothing as noticeable as to how it was.
After this i am convinced it is a software issue and hopefully another update in the future would fix it completely. But for now im satisfied.

Related

Flashtool and Sony Update Service Error (please delete)

Hi all,
EDIT: IT SEEMED TO HAVE FIXED ITSELF - MODS Please delete thread!
I have had my Sony Xperia Z Ultra for a while now and experienced many of the bugs read on this forum.
When I saw the .532 update for the HK version I immediately went on to flash it officially via the Update Service (mine is the HK version).
It updated fine without but I couldn't turn the screen off fully and the backlight stayed on continously draining the battery very rapidly.
So I decided to restore the device fully via the Official update service and this when the problem occured.
It started updating without problems but after a few seconds it just stopped and told me there was an error.
I tried it a few times to no avail and get similar result with the flashtool.
If anyone has any suggestions fire away.
Also, BL not unlocked, not root and neither custom recovery.
Many thanks
How u fixed the problem ?
Just interesting....
avetny said:
How u fixed the problem ?
Just interesting....
Click to expand...
Click to collapse
I turned my computer off and back on again and that made it work. Really randon

[Help] Lost IMEI after update to , and downgrade

Well, received my Sony Xperia Z Ultra C6833 a couple of days ago.
Received a notice on the OTA, upgraded to 14.1.B.2.257
I encountered random restart issues whenever Wifi is activated, so I thought, fine.
I finally have access to my computer, installed the PC companion, it prompt me with a new 14.2.A.0.290 update.
Again, I updated my phone, hoping it'll fix the Wifi problem.
After restarting, I did a test, as usual. Wifi problem persists, and what's worse, a new problem. Wifi and Playstation 3 SixAxis controller connected using bluetooth didn't play nice, caused my phone to reboot.
I know a lot of people downgraded the firmware back to the previous version, with NAN backups etc.
And some even managed to restore their IMEI back to normal.
But for my case, I haven't root my phone, attempt to downgrade it using Flashtool, lost my IMEI.
Seems that I have no choice, but to return it back to 14.2.A.0.290 praying that it works, and I still can't see my IMEI.
No, I don't have a NAN backup. That's the part which gave me a headache. I've messed around with HTC one X (a year ago), never had this problem problem before, and it's something new I've learnt from you guys today.
Tried cyangenmod's boot.img, doesn't do me any good.
Anyone managed to recover their IMEI here?
Otherwise I might have to get it back to the dealer for a replacement.
Update: Thanks to krabappel2548's guide, I've managed to flash it to 14.2.A.0.290 again and got my IMEI back, but SixAxis still won't play nice with Wifi, and the problem with random reboots while Wifi is ON still persists.
we have the same issue, mine happened during the old update, after ota wifi gets stuck, wont turn on and reboots the device. upto now its still not fixed. 3 updates have passed and still the issue persist. hope you find a fix it will help me too. tried everything from downgrading, flashing custom rom,kernel, upgrade, unlock, relock but still cant fix it
I guess i'm not the only one then. I can live with the wifi issue for the time being as long as i stick to using data. But i fear it's going to affect tethering should i need that.
Please take a look at this post, it may help you. --> http://forum.xda-developers.com/showthread.php?t=2573349
nopponm said:
Please take a look at this post, it may help you. --> http://forum.xda-developers.com/showthread.php?t=2573349
Click to expand...
Click to collapse
Read it the moment I discovered that my IMEI is missing.
I tried reflashing excluding the baseband, doesn't work for me, right after i realized i have a missing IMEI.
Read up on the android emulator, but haven't tried it, as my computer is kinda old, took forever to run it. Will try it once I get my hands on a faster computer
Bah. Crashed when I tried to use my qx100 which i've just received. Haha. Anyone else has any fun with qx100 and z ultra combo? The Z ultra almost reminds me of my ex-girlfriend.
Meanwhile, I can't wait for kit Kat, and hope they really squash these bugs
The best thing would be to contact Sony and make them aware of this bug. Losing your IMEI by simply updating should never happen and it's quite a serious bug.
Actually i lost it after downgrading. Downgrade is simply because of phone keeps rebooting after I turn Wifi on.
LordManhattan said:
The best thing would be to contact Sony and make them aware of this bug. Losing your IMEI by simply updating should never happen and it's quite a serious bug.
Click to expand...
Click to collapse
let's hope this is the answer : p
New build 14.2.A.1.114
abuihsan said:
let's hope this is the answer : p
New build 14.2.A.1.114
Click to expand...
Click to collapse
I certainly hope so too.
Hope it fixes the rebooting issue with WiFi enabled.
Or the Google Play Edition port if it does fix the problem too
Anyone tested the new update yet? Does it fix the wifi issues with crashing/rebooting?
ok so i purchased my phone on amazon and got it somewhere around feb 25th, i got a message on the phone to update software so naturally i did, then i discovered what rooting does and i decided to follow some youtube instructions to flash my phone to an earlier firmware the link wasnt working so i found another which was C6802_14.1.B.0.475_GENERIC Hong Kong.ftf after flashing this i lost my imei its all zeros and i then tried flashing C6802_14.1.B.1.526_M3dD0g.ftf with no luck so im trying to find out what the updated software was that i must have downloaded when i first got the phone given the date i had recieved it im thinking that the 14.2.A.1.142 is the correct one that i must have updated to, i was running version 4.3 jelly bean before all this happened i also have this problem where everytime i turn off the phone and turn it back on it is in the chinese writing again and asks me to select my language again anyone know what to do short of return the phone while i still got time my internet is extremely slow im tired of it taking 4 hours to load a new ftf just to find out its not the right one ive heard some where hving success with the 290 getting their imei back but im thinking thats the software they started with or updated to to get it back so i have no idea which one i started with or which one i updated to all i know is the date i got it and that possibly its the 14.2.A.1.142 looks really familiar im downloading that one now so we will see what happens and i also read something about flashing excluding the basebands so if that is part of it please make it as clear as possible im obviously a noob but im learning quick
Pleas dont ask the same question in multiple threads.
See my reply to the other thread you necromanced

problem with firm ware version 17.1.2.A.0.314

So some time back I made a thread regarding a problem I was facing. My phone would randomly freeze up and restart on its own. I tried hard resettig, repairing using PC companion, flashing using Flashtools , changing SIMs etc. but nothing seemed to fix it. Then I had to arrive to the dreadful conclusion that it was a hardware fault. But 2 days ago I got the bright idea of flashing an older firm ware version (17.1.1.A.0.438) using flash tools without wiping internal data and now the problem is 100% fixed. the phone hasn't restarted even once after a 3 full days of heavy use. So with this I can safely say that the probem is with the 17.1.2.A.0.314 firmware. Has anyone else had this issue? because my friend also owns a z2 and his phone works just fine with the 17.1.2.A.0.314 firmware. Any ideas how to fix it?
Flash 314 fw with wiping data

Xperia companion - repair

In the last few days my phone started lagging badly. Apps often crash, some random restarts happen etc. So my question is: If I use Xperia companion to repair the phone (I understand all data will be lost that way), will I remain with some stock 6.0.1 MM, or this process downgrades the firmware to old 5.0 LP? I'd really like for someone to share his experience if he/she's done it before.
repair is not a downgrade dude
and i think XC wont let you to downgrade a software, if you wish to downgrade you can use Flash Tool
prohacker17 said:
In the last few days my phone started lagging badly. Apps often crash, some random restarts happen etc. So my question is: If I use Xperia companion to repair the phone (I understand all data will be lost that way), will I remain with some stock 6.0.1 MM, or this process downgrades the firmware to old 5.0 LP? I'd really like for someone to share his experience if he/she's done it before.
Click to expand...
Click to collapse
Nope, when you repair you will stay on 6.0.1 .

Random Android Crashes on stock firmware 23.5.A.1.291

Hi everyone.
I am writing for some help from the community. I own a a Z2, 16 GB D6503 which is now running stock US international filmware 23.5.A.1.291. I've had several random crashes where the cellphone is unable to react from. When this happens the last thing on the screen freezes and I have to forcefully turn it off using power button and up volume shortcut since it does not react to any touch.
It appears that happens randomly. I haven't identified what is triggering the crash (and is not very frequent but as very nnoying). Finally, I made a fresh install using flash tool to see if I could solve this issue but I had not much success. The device is not rooted and boot loader not unlocked.
I don't know what to do now.
Any suggestions?
i have on my phone filmware 23.5.A.1.291 over one year
and it newer chrashes or i had those probleme .
you can flash with flashtool the firmware new And if you still have such problems
Something is broken on your phone

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