[Q] Screen goes black when unlock - T-Mobile LG G2x

When I unlock my phone (as in push the unlock button) the screen remains black but lightly lit. The bottom four buttons remains lit when the screen is touched. Currently I'm using Eaglesblood 1.5 Rom with latest Trinity 1.1 GHz. I tried using the latest CM7 Kangs and the stable 201 rom with both trinity and faux with and with out overclock and the same thing still happens. Even with a clean wipe it still happens. Currently I have Juicedefender, AdAway, KeyboardManager Launcher, Go Launcher (have used ADW and ADW Ex) running. I have advanced task killer as well but it's not set to autokill.
Does anyone have any suggestions as to what I should do to remedy this problem? If not i'm stuck with the usual battery pull each time the screen goes black. Also I don't think it's a sleep of death because the phone is not frozen as the touchscreen and side buttons are responsive. It should also be noted that the battery is NOT hot when the screen is black.

Also, I'm using an overclock widget that's set to 432000-1100000 screen on, and 432000-750000 screen off. I have tried varying the frequencies too. Should I change my values?

Try uninstalling juice defender. I had issues with a similar app.
Sent from my LG-P999 using XDA App

Overclocking can be handy, but if you set it too high or overclock your phone too much, it could damage the phone itself. I uninstalled my "SetCPU" once I learned that. However, it could just be that there is a hardware fault within the phone that is causing the screen to be black. Maybe the LCD or backlight?

Happens to me too sometimes on both weapon and cm7.2.
I just do a battery pull and hopefully it doesn't happen soon again.

Uninstalling juicedfender seemed to have fixed it for me thanks so much!

jim.k.yee said:
Uninstalling juicedfender seemed to have fixed it for me thanks so much!
Click to expand...
Click to collapse
Awesome. Glad I could help.
Sent from my LG-P999 using XDA App

Related

[Q] What problems still exist after update?

It appears that both LG and T-mobile are putting a LOT on the hope that this update has indeed fixed all of the problems plagued with the G2X. But to be honest with you, I only notice 2 differences with the update...gps and data speed.
Problems I'm still having:
Random reboots
Lock-ups when switching from USB storage on to off
Sleep of death (try to wake the screen with the power button, and you can see some kind of slight light behind the black screen, but requires a battery pull)
Camera is dark, dark, dark
MP3 Ringtone at max volume when call is coming in is distorted
I will edit this if I think of more, but I have to go handle some business en el bano.
Please reply if you are having these issues, not having these issues, or if you have other issues.
mmapcpro said:
It appears that both LG and T-mobile are putting a LOT on the hope that this update has indeed fixed all of the problems plagued with the G2X. But to be honest with you, I only notice 2 differences with the update...gps and data speed.
Problems I'm still having:
Random reboots
Lock-ups when switching from USB storage on to off
Sleep of death (try to wake the screen with the power button, and you can see some kind of slight light behind the black screen, but requires a battery pull)
Camera is dark, dark, dark
MP3 Ringtone at max volume when call is coming in is distorted
I will edit this if I think of more, but I have to go handle some business en el bano.
Please reply if you are having these issues, not having these issues, or if you have other issues.
Click to expand...
Click to collapse
Only problems ppl complaining about is not having lg camera in gb
Sent from my GT-P1000 using Tapatalk
mmapcpro said:
Problems I'm still having:
Random reboots
Lock-ups when switching from USB storage on to off
Sleep of death (try to wake the screen with the power button, and you can see some kind of slight light behind the black screen, but requires a battery pull)
Camera is dark, dark, dark
MP3 Ringtone at max volume when call is coming in is distorted
Click to expand...
Click to collapse
So basically this update has fixed nothing?
I had no problems before update except for some minor black light bleed. After update I had a few sleep of death issues happened 4 time in the few days running the update. Yesterday I flashed the rooted update and have had No problems yet.
Sent from my LG-P999 using XDA Premium App
It fixed my wifi, it's like night and day now. Battery has very slightly improved. LG camera is gone. Overall though, I'm happy.
I was happy but just had a random shutdown. First one hopefully last. That is with the update
Sent from my LG-P999 using XDA App
I really HATE the new buttons on the keyboard...as well as the fact that double hitting spacebar no longer equals a period. I know they're petty, but they annoy the f*** out of me.
bballcat03 said:
I really HATE the new buttons on the keyboard...as well as the fact that double hitting spacebar no longer equals a period. I know they're petty, but they annoy the f*** out of me.
Click to expand...
Click to collapse
Should be a setting under the keyboard settings to re-enable the double tap period shortcut.
G2X CM7
omarsalmin said:
So basically this update has fixed nothing?
Click to expand...
Click to collapse
I know right? Since I updated my phone still won't help me make an army of tiny, laser toting robot minions. Stoopid LG.
Sent from my butt using XDA Premium App
My problems got worse. GPS won't lock on now, and when it does, it's like 30 miles off.
Getting more freezes and reboots.
Finally decided to try a warranty replacement!
The update fixxed all the reboot problems for me, however my GPS still takes forever to get a fix, and once when checking for a text message i was expecting, i would turn the screen on and off every 15 seconds or so for about 2 minutes, which eventually led to the screen getting stuck. Everything seemed to work (slight vibrate when using the unlock slider, able to feel buttons being touched through the vibration), just the screen was frozen. Weird bug, was fixxed with a battery pull and a restart though.
for those wanting the lg camera app on gingerbread, couldnt you just make a backup of the application with titanium backup and restore? Or is it not compatible on gingerbread?
Sent from my HTC Glacier using XDA Premium App
I have the following issues:
1. Phone turned off while charging overnight
2. During calls, it cuts in and out almost constantly (or every several seconds)
3. Battery life hit the crapper (due to Juicedefender not turning off radio and bloatware present again since I'm not rooted anymore)
I haven't gotten any reboots or lockups, yet
Wifi is pretty solid now
Somewhat better performance, although it lags a bit when woken up
d12unk13astard said:
for those wanting the lg camera app on gingerbread, couldnt you just make a backup of the application with titanium backup and restore? Or is it not compatible on gingerbread?
Sent from my HTC Glacier using XDA Premium App
Click to expand...
Click to collapse
Not yet compatible.
G2X CM7
Lakonikos said:
The update fixxed all the reboot problems for me, however my GPS still takes forever to get a fix, and once when checking for a text message i was expecting, i would turn the screen on and off every 15 seconds or so for about 2 minutes, which eventually led to the screen getting stuck. Everything seemed to work (slight vibrate when using the unlock slider, able to feel buttons being touched through the vibration), just the screen was frozen. Weird bug, was fixxed with a battery pull and a restart though.
Click to expand...
Click to collapse
Regarding GPS, just curious if you have wireless networks enabled under Settings > Location and Security
G2X CM7
Just got the OTA this morning and I've noticed much faster GPS lock and vastly improved call quality (no more drop outs!). Only been a few hours though so this is just my initial impressions. Would love it if the battery life improves but I'll have to wait and see.
My phone is way faster now and I even got a quadrant score above 3000 but it's locked up and rebooted 3 times today so I have mixed feelings.
Sent from my LG-P999 using XDA App
cuda340 said:
My phone is way faster now and I even got a quadrant score above 3000 but it's locked up and rebooted 3 times today so I have mixed feelings.
Sent from my LG-P999 using XDA App
Click to expand...
Click to collapse
My Quadrant speeds are the same as before... Around 2800.
I've had several random reboots today and only had maybe 4 over the last 3 months with Froyo. Trying out some different ROMs, xboarders tweaked, to see if that corrects some of the problem.

question about black screen of death

usually you will get the black screen of death when:
-after a phone call
-during/after charging
-when hitting the power button to turn off or turn on your screen.
do you think that the gingerbread launcher is causing this problem?
Ive read on other forums on different phones that the launchers were causing the same problems on their phone as well and when they switched launchers, it all stopped.
is this a reasonable explanation?
Nope. It happens to my wife on GO Launcher as well.
Sent from my LG-P999 using xda premium
??
what is the black screen of death? or am i better off not knowing. lol
i have go launcher on my phone and wad curious if i have experienced the black screen of death. sounds scary lol
Aestetics said:
usually you will get the black screen of death when:
-after a phone call
-during/after charging
-when hitting the power button to turn off or turn on your screen.
do you think that the gingerbread launcher is causing this problem?
Ive read on other forums on different phones that the launchers were causing the same problems on their phone as well and when they switched launchers, it all stopped.
is this a reasonable explanation?
Click to expand...
Click to collapse
Only SOD I ever come across is the call SOD. That happens when running Trinity kernel on CM7 or CM7 based roms. Morfics updated Trinity kernel I assume has fixed the SOD as I haven't come across it while running CM7's nightly 199.
Sent from my LG-P999 using XDA App
suicidalintentions said:
what is the black screen of death? or am i better off not knowing. lol
i have go launcher on my phone and wad curious if i have experienced the black screen of death. sounds scary lol
Click to expand...
Click to collapse
This is when your phone goes on permanent "sleep" as in your screen wont turn on. Only way to turn it on is to do a batt pull and reboot.
Sent from my LG-P999 using XDA App
i use 2.3.7 eaglesblood running the trinity kernal and knocn on wood no problems at all. Hope i dont get that phone disease.
The kernel is the problem. I've said it a million times. Its why CM7 based roms don't do this and those with custom kernels. My Asus transformer did this (tegra 2) until a custom kernel came out.
Change the kernel and fix the SoD.
LG G2x - 2.3.7 CM7
Asus Transformer - 3.7 Revolver OC/UV
Black Screen of death
I recently flashed EB 2.3.7 / 2.5 (runs amazing by the way) but have one small issue. When charging my phone at night it goes into perm. sleep mode for the last 3 nights. My wake up call never goes off . I read somewhere it may be kernel related, so I flashed faux .46 hoping that would resolved sleep issue. It has not, anyone else have any insight?
Thanks.
That happens sometimes or stock ROM.
Sent from my LG-P999 using xda premium
gman87 said:
This is when your phone goes on permanent "sleep" as in your screen wont turn on. Only way to turn it on is to do a batt pull and reboot.
Sent from my LG-P999 using XDA App
Click to expand...
Click to collapse
Hold the power button down for a long time. After about 30-45 seconds, something will usually happen. Sometimes the home screen will flash on for a second and then go black again, sometimes the home screen will come on but will be in a frozen state and won't accept input, and sometimes the screen will come back on normal. This will allow you to avoid a battery pull maybe a quarter to a third of the time you get an SOD.

App for locking the screen brightness?

Hashcode and twa_priv both have great ROM's out now, that work wonders with the battery drain in standby. One of my kids gets -15 or less drain when in deep sleep now. Amazing.
But my other daughter, hers keeps spiking up over -120 and higher while using the same rom. I saw that the screen brightness cant be set to 100 or the screen doesn't fully shut off, and that is exactly what is happening. I can still see a dim backlight sometimes when turned off.
I keep changing it to a lower setting, and then she gets great battery life for a while, then something is changing the screen brightness back to 100. She isnt doing it, because I grounded her from it for a couple days, and it still did it when she wasn't even playing. So I wiped everything, clean installed the 01/08 rom fresh today, and it still does it.
Is there an app that will lock the brightness for me? I cant seem to find one.
Thanks!
I had that same issue on my KF repeatedly and found that it was from build.prop changes. Switched to Paranoid Android and the in notification brightness slider has been perfect and the screen off/on issue never came back.
Sent from Epic Touch Paranoid
Impius said:
I had that same issue on my KF repeatedly and found that it was from build.prop changes. Switched to Paranoid Android and the in notification brightness slider has been perfect and the screen off/on issue never came back.
Sent from Epic Touch Paranoid
Click to expand...
Click to collapse
Cool, thanks for the tip!
Once I studied this Kindle closer, you could see the screen backlight come on for a few seconds, then back to sleep, then back on, and back to sleep. A clean install of the latest rom from twa_priv seems to have fixed the problem, he reverted some kernal changes that were causing problems for some users.
Funny that you are in Eustis, I live there and in Mt. Dora for a while, back around 1988 to maybe 1993. I am in Ocala now.

htc sensation backlight aleays on even when phone is off.

as said above. my 4 soft buttons backlight are always on even when i shut off the phone.
im using arhd 6.8.0. when phone is off, a dim light is shown in the soft buttons. when i first installed the rom its very smooth. i tried hard resetting the phone but it still doesnt fix the problem.
its very annoying as it drains the battery even when phone is off. sometimes the backlight flickers adjusting the intensity of the light. help pls. thanks
rainversion13 said:
as said above. my 4 soft buttons backlight are always on even when i shut off the phone.
im using arhd 6.8.0. when phone is off, a dim light is shown in the soft buttons. when i first installed the rom its very smooth. i tried hard resetting the phone but it still doesnt fix the problem.
its very annoying as it drains the battery even when phone is off. sometimes the backlight flickers adjusting the intensity of the light. help pls. thanks
Click to expand...
Click to collapse
wats yo kernel? n hboot version n status?
------------------------------------------------
PRESS THE PRETTY "THANKS" BUTTON IF I HELPED
Sent from a shaked up HTC Sensation XE using xda premium
ashkan-khatar said:
wats yo kernel? n hboot version n status?
------------------------------------------------
PRESS THE PRETTY "THANKS" BUTTON IF I HELPED
Sent from a shaked up HTC Sensation XE using xda premium
Click to expand...
Click to collapse
im using sebastianFM kernel and 1.27 hboot. do you think if i backup to official ics, would it fix the problem.
help pls. thanks
up
rainversion13 said:
im using sebastianFM kernel and 1.27 hboot. do you think if i backup to official ics, would it fix the problem.
help pls. thanks
Click to expand...
Click to collapse
actually try a different kernel
see how it goes
but do first a nandroid backup just in case
rzr86 said:
actually try a different kernel
see how it goes
but do first a nandroid backup just in case
Click to expand...
Click to collapse
ok ill try that. but here's the thing. whatever app i use to turn off the backlight of the soft keys. it only dims it to the lowest level and doesnt completely turn it off.
when you look at your phone in a different angle, you can still see a very small light emitting in the soft keys part even when you shut off the phone. i tried reinserting the battery hut it doesnt fix the problem.
rainversion13 said:
ok ill try that. but here's the thing. whatever app i use to turn off the backlight of the soft keys. it only dims it to the lowest level and doesnt completely turn it off.
when you look at your phone in a different angle, you can still see a very small light emitting in the soft keys part even when you shut off the phone. i tried reinserting the battery hut it doesnt fix the problem.
Click to expand...
Click to collapse
Make a backup, do a full wipe in recovery, and reinstall the ROM you want fresh. If the propblem goes away then something is just screwy in your current ROm install and you may just have to set up a fresh install of it.
Skipjacks said:
Make a backup, do a full wipe in recovery, and reinstall the ROM you want fresh. If the propblem goes away then something is just screwy in your current ROm install and you may just have to set up a fresh install of it.
Click to expand...
Click to collapse
i hope your right that its just a rom problem because sometimes out of nowhere, all of a sudden when i shut off the phone, the backlights were completely gone(which is what i want to happen).
I'll post the results later. thanks.
by the way, when i used cpu spy it doesnt turn into deep sleep when the screen is off even if there is no apps running.
i left the phone for 6 hours screen off and charging. and only 8 minutes it turn into deep sleep state. the other remaining comes from my lowest speed which is 384. so im joping its just a rom problem.
rainversion13 said:
by the way, when i used cpu spy it doesnt turn into deep sleep when the screen is off even if there is no apps running.
i left the phone for 6 hours screen off and charging. and only 8 minutes it turn into deep sleep state. the other remaining comes from my lowest speed which is 384. so im joping its just a rom problem.
Click to expand...
Click to collapse
update! i tried installing another rom. it fixes one thing. when the phone is shut off, the backlight is completely gone. but when the phone is in sleep mode, it still has a very dim backlight on the 4 soft buttons. what seems to be the problem?
need help pls. anyone experiencing this same annoying issue?
rainversion13 said:
update! i tried installing another rom. it fixes one thing. when the phone is shut off, the backlight is completely gone. but when the phone is in sleep mode, it still has a very dim backlight on the 4 soft buttons. what seems to be the problem?
need help pls. anyone experiencing this same annoying issue?
Click to expand...
Click to collapse
Wait a minute...when you said the backlight stays on even when you shut off the phone I thought you meant like when you turn the screen off. Do you mean when you physically power off the device?
That's really screwy. If so, something is really REALLY messed up.
Try the following 3 things in this order from easiest to hardest.
1) Remove the SD card. Reboot the phone. See if the problem persists. If it goes away without the SD card, copy your files to a computer, format the SD card, and copy your files back. I give this a 10% chance of working but its quick to test it so why not try?
2) Do a full wipe. Flash a bone stock Sense ROM. Seen if the problem goes away. If it does, wipe again and install whatever you want.
3) Run a full ruu and return to completely stock. If the problem is still there your hardware is broken. If the problem goes away you will have to restart the rooting process. You will have to redo s off, redo superuser, etc. Then flat whatever ROM you want.
Try doing an full ruu back to bone stock. Reroot, and start over with a new ROM. You will have to go through the whole s off process again. But it might fix this. And form the sound of it you have somehow borked things that shouldn't have ever been touched.
Sent from my GT-P5110 using xda app-developers app
Skipjacks said:
Wait a minute...when you said the backlight stays on even when you shut off the phone I thought you meant like when you turn the screen off. Do you mean when you physically power off the device?
That's really screwy. If so, something is really REALLY messed up.
Try the following 3 things in this order from easiest to hardest.
1) Remove the SD card. Reboot the phone. See if the problem persists. If it goes away without the SD card, copy your files to a computer, format the SD card, and copy your files back. I give this a 10% chance of working but its quick to test it so why not try?
2) Do a full wipe. Flash a bone stock Sense ROM. Seen if the problem goes away. If it does, wipe again and install whatever you want.
3) Run a full ruu and return to completely stock. If the problem is still there your hardware is broken. If the problem goes away you will have to restart the rooting process. You will have to redo s off, redo superuser, etc. Then flat whatever ROM you want.
Try doing an full ruu back to bone stock. Reroot, and start over with a new ROM. You will have to go through the whole s off process again. But it might fix this. And form the sound of it you have somehow borked things that shouldn't have ever been touched.
Sent from my GT-P5110 using xda app-developers app
Click to expand...
Click to collapse
Well, when the phone is off, the backlight is already gone. So its ok now. The CPU spy also states that when I turn my screen off, it turns into deep sleep. That one is fixed too. But when I charge the phone and let my screen off, it doesn't go into deep sleep but it consumes the least frequency of the processor which is 192mhz I don't know if that is normal.
I think I have a hardware problem since I sent my phone to replace its microphone flex which includes the lights coming from the buttons. I'll try to send it back to the center since it still has warranty.
Thanks. I'll update you.
rainversion13 said:
Well, when the phone is off, the backlight is already gone. So its ok now. The CPU spy also states that when I turn my screen off, it turns into deep sleep. That one is fixed too. But when I charge the phone and let my screen off, it doesn't go into deep sleep but it consumes the least frequency of the processor which is 192mhz I don't know if that is normal.
I think I have a hardware problem since I sent my phone to replace its microphone flex which includes the lights coming from the buttons. I'll try to send it back to the center since it still has warranty.
Thanks. I'll update you.
Click to expand...
Click to collapse
Any update on this issue? My wife's phone has many screen problems, but one of the primary symptoms is that the backlight is almost always on in the lower left corner, even after removing the battery and reinserting it, before booting. When I charge it, the backlight gets brighter and I see dark pixelation across the screen. At times the screen has crapped out completely, and it usually appears dark, has some light flickering, blotching, and vertical lines. I'm wondering whether this is an LCD/backlight issue at all or another hardware issue. Don't want to buy an LCD if that won't fix anything. Some LCD/digitizer assemblies have a mic cable, though, so I'm curious about what you found out about that. Thanks

Lock screen problem

Hello,
I've run many different AOSP roms and so far each one has given me lock screen issues. When I press either the power button or the home button to unlock, the phone screen stays black but the hardware keys glow. This will keep happening for almost a minute and then it will work normally. Battery pull always fixes it temporarily. Is there an obvious answer to this? Thanks!
Sent from my SCH-I535 using xda premium
Danno131313 said:
Hello,
I've run many different AOSP roms and so far each one has given me lock screen issues. When I press either the power button or the home button to unlock, the phone screen stays black but the hardware keys glow. This will keep happening for almost a minute and then it will work normally. Battery pull always fixes it temporarily. Is there an obvious answer to this? Thanks!
Sent from my SCH-I535 using xda premium
Click to expand...
Click to collapse
I find I have this problem whenever I'm using a battery saving governor ...such as ktoonservative, smartass etc. Changing to wheatley or pegasusq seems to solve it. Also if I try to set my minimum CPU below 384 it does it along with screen flicker. But that's just me.

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