Develop Bugs

My phone can't handle non stock kernels?

Hello fellow XDA brethren! ​
I am reaching out to whomever may be able to give me an "advanced" type of explanation in regards to
modified kernels being applied to my phone.
T-Mobile Galaxy SIII (32Gb White)
I seem to be having issues with many of the kernels offered by some of the excellent developers in the t999 forum.
Namely, ktoonsez, and the other famous dev who's name escapes me right now.
When I flash kernels like those above, my main symptoms are:
Artifacting / Glitchyness in GUI.
Now... I know that some kernels are geared towards battery life and are undervolted to a point, I've tried everything,
volting back up. I've been flashing every one of them properly as well. I know that people say "all phones aren't created
equal", but i refuse to believe that mine is so whack that I cant even use anything other than stock kernels.
I firmly believe that these symptoms are from GPU overclocks that my phone simply cannot handle, (explains artifacts?).
I can use different roms with their respective kernels such as CM10, and a few of the other popular TW roms that are offered.
Here's what I was wondering:
Is there any application that I can use to control GPU overclock (to see if tweaking with this fixes it, to narrow it down
that my phones GPU is just very sensitive)
Are there any kernels out there for touchwiz that give me some nice benefits that dont have any GPU overclock?
What other methods can I fool around with to see exactly what part of my phone is weak?
Any suggestions are appreciated!
I get LOUSY batterylife / performance on tmo stock kernel.

If it were a PC, the first thing I would suspect of causing the artifacting issue is bad video memory. Combine that with the poor performance on stock, it stands to reason that you may have gotten a bad phone from the factory. I would suggest that you consider simply having it replaced under warranty, if you do have bad RAM in the phone the problems will only get worse.

[Q] Are there known issues with this device? GPS, etc?

I have a ton of phones. I always seem to hit issues with them (lack of developer support, no updates, something non-working, etc).
I want to have at least Android 4.1+ (so falling back to carrier-provided Gingerbread is not something I want to deal with).
Two of my most recent devices are the SGH-T959V (Galaxy S 4G) and SGH-T959 (Galaxy S Vibrant). Issues with those seem to be with the GPS. I've read that it just doesn't work right on the Vibrant, and I know it doesn't work on the S 4G. Falling back to Android 4.0 on the S 4G gets the GPS to work, but then its 2.x kernel has issues sleeping, and I've had issues making calls (I couldn't hear the other person!). The S 4G also has never had an "official" release of CyanogenMod, AOKP, etc. These devices have blown me away with how speedy they seem, but lack of functional software just turns me off.
What about the SGH-T989? Does this phone "just work"? What are the known issues?

in my opinion all SAMSUNG phones have weak GPS chips there is always something extra you have to flash if you are running a custom ROM, the best GPS you will ever get will be staying on a stock device, every phone runs different so you would just have to check for yourself if the GPS is up to par with your standards. i don't use GPS much so i don't really rely on it much but can understand where you are coming from

This phone is quite good in terms of build quality. There are tons of awesome ROMs, mods, etc. for this phone. Cyanogenmod supports it, Aokp supports it. My only problem with it is battery, which, for me only last around 8 - 10 hours. But I am a heavy user, with several email accounts pushing, and games.
I use the GPS from time to time. It picks up the GPS signal usually quite fast. There is also a hack available to speed up the lock on. If I recall correctly, the original stock rom had an issue with the compass orientation, so it will start off weird in the beginning when you use maps, but will self correct after a bit. I have changed so many ROMs, and I don't think I see this issue anymore.

Watch for that sticky power button... It's devastating :what:
But I'd get the sii for sure it's a great phone. Even greater people
Sent from my SAMSUNG-SGH-T769 using xda premium

V500 SLOW WiFi speeds-need Help

I came across a used G Pad 8.3 about 10 days ago for a $130, so I decided to snag it based on the cheap price. It was rooted & running CM11 and I used it as it was for the first week as I've installed CM on many of my older devices and enjoy it. Since day one I've noticed that wifi download speeds have not been good, though Web pages, YouTube videos and the like don't seem to have any real problems? When downloading a 200mb file I see speeds of 50-130kbps and it takes roughly 20mins to finish. The same file on other Android devices I own are finishing six or seven minutes. I've tested it with various files and devices. Thinking the problem may have been related to the Rom installation by the previous owner, I downloaded "CM 11 by Infected", reflashed the base and tested with the included kernel as well as "Red Kernel". Still, the problem has remained. I haven't tried returning to the stock LG Rom since I really prefer AOSP, but I'm afraid that may be my only resort? Is this a known issue with AOSP or CM for the V500? The device is in excellent condition with no signs of wear, so I don't believe the hardware itself could be damaged. I've searched the forums thoroughly and I've seen the problem reported by another user but no one provided any replies. I'm posting as a last resort before flashing LG's official firmware, and hoping someone is familiar with this problem. Is anyone using AOSP based Roms with no wifi problem? Thanks in advance to anyone who may be able to help, or offer any personal experience.
Sincerely,
Androholic

My v500 is running slimkat with redkernel and it runs at the same speed as my other devices for downloads. I have heard of certain devices not playing nice with certain routers before... Can you try a different WiFi access point to see if it only occurs with the one you normally use?

I had the same problem: turns out it was my router's fault, an old Thomson.
Try the download speed with different access points

Well I ended up flashing 4.4.2 stock rooted rom, and the wifi seems to be functioning as normal now. I never take the tablet out of the house with me, as I have an ipad air with LTE I use outside of the house. Either way I've found that after some tweaking and debloating the stock LG Rom is not so bad. I may eventually do some testing on a different router using CM, but for now at least I'll just stick with the stock rom. Thank you both for your replies, it's much appreciated.

how it's lollipop working for you?

I have the Verizon flavor and passed on the upgrade due to my experience on my lg g2. My battery life went all to hell so i rolled back to kitkat and am quite happy to stay there. I'm curious as to how the upgrade is working for you on this device.

I personally love CM12.1 right now. It very (as in never) rarely crashes and for some reasons, apps seems to be more stable than on other roms. I have not experienced any battery issues and it seems to be the contrary for me because I am getting noticeably better battery life than before. Just to clarify things, I am running a V500, rooted, and running TWRP 2.8.

mach01 said:
I personally love CM12.1 right now. It very (as in never) rarely crashes and for some reasons, apps seems to be more stable than on other roms. I have not experienced any battery issues and it seems to be the contrary for me because I am getting noticeably better battery life than before. Just to clarify things, I am running a V500, rooted, and running TWRP 2.8.
Click to expand...
Click to collapse
That was not his question...

Although I recognize some things I don't like in official Lollipop for the VK810.4G, I like it. Smoother, faster, especially [insert plug here] on my maximum debloated stock ROM in my signature below [/insert plug here]. ?I'm a function over form guy, though.
Sent from my VK810 4G

Thanks for the reply. Hopefully some more will reply.

I upgraded my VK810 (Verizon) and I am not very happy with it. The battery life is similar to kitkat during normal use, but it is terrible at idle - burns 1.5%/hour overnight. It lags pretty regularly, sometimes even on the pin unlock screen for a few 5-10 seconds in the middle of entering.
I have done a full factory reset and set it up from scratch, which didn't improve the performance.
I am considering a flash of KK or even going back to JB. 4.2.2 was the most stable and bug-free version, in my opinion. I am reluctant to flash it, because it's a work tablet and I'd rather not risk bricking it. The only real reason I upgraded to LP was for the proper handling of trim on encrypted devices.
(I am not usually one to bash new releases. My Sony Z1c is incredible with LP, though it needed a factory reset to get there.)

rjkmadison said:
I upgraded my VK810 (Verizon) and I am not very happy with it. The battery life is similar to kitkat during normal use, but it is terrible at idle - burns 1.5%/hour overnight. It lags pretty regularly, sometimes even on the pin unlock screen for a few 5-10 seconds in the middle of entering.
I have done a full factory reset and set it up from scratch, which didn't improve the performance.
I am considering a flash of KK or even going back to JB. 4.2.2 was the most stable and bug-free version, in my opinion. I am reluctant to flash it, because it's a work tablet and I'd rather not risk bricking it. The only real reason I upgraded to LP was for the proper handling of trim on encrypted devices.
(I am not usually one to bash new releases. My Sony Z1c is incredible with LP, though it needed a factory reset to get there.)
Click to expand...
Click to collapse
Same here. Upgraded and not very happy with it. Has more issues connecting to hotspots in my house (issues I didn't have with KK) and it lags, a lot. Some things are certainly better, but I don't think it's any faster - if anything, just the opposite. Is anyone else having the lagging issues? I find it mostly when I'm playing games or doing things that tax the processor.

Found my old GNexus in a drawer, is it worth tinkering with?

Hey XDA,
Hope all is well for everyone. I don't know how active this sub is, but I am gonna ask anyway!
I was doing some cleaning and found my old Galaxy Nexus (I9250) Maguro. I gave it to my mom to use, but then i gave her my Note 3 and now S7 edge. We are thinking of just sending this phone to an aunt but since its old and runs JB we may not even do that. I dabbed into rooting back when I had it but I am wondering what the community around the GNexus is in terms of custom roms? What is possible to do with this old phone? My only worry is that its only the 16GB version and the ram isn't alot. How well do custom roms work on the GNexus? Maybe I can update it and maybe side load AA and use AA mirror to access youtube and other things in the car, or maybe even just get it rooted and run linux, but I am wondering how performance will be? is it worth it?
Thanks

It seems to be difficult to make a ROM for this device which is fast *and* stable (especially when the battery starts deteriorating and you want to take a whole bunch of photos = constant reboots when the sudden power draw causes the power management software to freak out). Mine is now running ZeeLog's unofficial build of LineageOS 14.1 - it seems pretty stable, but 14.1 on the GNex is s-l-o-w. I only really keep it as an emergency spare, but since it's here I've been using it for streaming. In a few days when that use stops, it'll be relegated to occasional use as a Wi-Fi dongle for OSs which can't see the *actual* dongle on the computer - being tethered while that happens means the failing battery won't matter too much.
tl;dr it'll be slow, and may need frequent / continuous access to charging

I also want to repurpose my old GNEX. Any good rom suggestion ?
I'd like a fast booting rom, and just turn it into a glorified ereader... Suggestion wanted please! Thanks