Database Info

[Q] Screen won't wake up?

My screen would not wake up, I flashed Cyanogen Mod, the latest version, but as soon as my screen goes off and I tried to wake it, it'll just stay in a lighted black screen forever, nothing happens, it wont wake or respond to buttons so I have to pull battery. It didn't happen on just this rom, I tried other roms as well. And same results, is it my phone or rom? I just got the phone today.

Which rom are you running? And did you flash a custom kernel?
Try a complete wipe and reflashing, but don't restore any apps, if you do, and see if the problem persists.

buru898 said:
Which rom are you running? And did you flash a custom kernel?
Try a complete wipe and reflashing, but don't restore any apps, if you do, and see if the problem persists.
Click to expand...
Click to collapse
I was running the latest version of Cyanogenmod. And no, I did not flash a custom kernel. I've already tried a complete wipe and flashed the rom like so many times. Like Cyanogenmod would install, but as soon as I put the phone to sleep and I hit the home button to try to wake it, it would be stay as a lighted black screen. The phone is responding to the button but it seems like the screen would not go on, the light for the 4 buttons lights up, but the screen doesn't display anything, just backlight. Please help, this is confusing me.

Set the phone to not sleep, it will just dim the light to near 0% brightness. I used to have this problem too on some nightlies and stable cm releases even and doing the above worked for me. I also bumped minimum cpu speed to 500-800 instead of 300, which lagged too much imho.
Sent from my LG-P999 using xda premium

NekoNyapii said:
I was running the latest version of Cyanogenmod. And no, I did not flash a custom kernel. I've already tried a complete wipe and flashed the rom like so many times. Like Cyanogenmod would install, but as soon as I put the phone to sleep and I hit the home button to try to wake it, it would be stay as a lighted black screen. The phone is responding to the button but it seems like the screen would not go on, the light for the 4 buttons lights up, but the screen doesn't display anything, just backlight. Please help, this is confusing me.
Click to expand...
Click to collapse
You say you press the home button when you turn the screen off and the buttons light up? Or did you mean when you pressed the power button?

When I press on the power button to wake it up, it just gives me a black screen. However the buttons light up when I touch them just the screen wont display anything.
Sent from my LG-P999 using xda premium

NekoNyapii said:
When I press on the power button to wake it up, it just gives me a black screen. However the buttons light up when I touch them just the screen wont display anything.
Sent from my LG-P999 using xda premium
Click to expand...
Click to collapse
That happened to me once. Did you wipe "system" in CWM before installing the rom?

Same Issue
Did you ever find a fix for this problem? My G2x just stopped coming on and I never changed any settings or anything. I've wiped davlik & user data; installed stock and custom roms, but every time the screen turns off the power button fails to wake the phone up. No lights flash or anything. I've found others who have the same problem but I haven't discovered any solutions. I'm guessing this must be a hardware problem since the power button does work to initially turn on the device and lock it but can't wake it. Any help would be greatly appreciated.
I'm currently running a rooted stock rom with the v21y BB that's been ICS-ified

r3sidual said:
Did you ever find a fix for this problem? My G2x just stopped coming on and I never changed any settings or anything. I've wiped davlik & user data; installed stock and custom roms, but every time the screen turns off the power button fails to wake the phone up. No lights flash or anything. I've found others who have the same problem but I haven't discovered any solutions. I'm guessing this must be a hardware problem since the power button does work to initially turn on the device and lock it but can't wake it. Any help would be greatly appreciated.
I'm currently running a rooted stock rom with the v21y BB that's been ICS-ified
Click to expand...
Click to collapse
I've found this issue to exist of literally EVERY build of CM that I've every used on ANY android device. I can't stand it. I finally stopped flashing CM all together because I hate not being able to wake up my device. NO OTHER ROM has done this before. Doesn't matter the model. Here's all the models that exibit this behavior that I've tested with.
Kindle Fire - CM9, CM10 and CM10.1
Galaxy 7 tab 2 - CM10, CM10.1 and CM10.2
Samsung Epic 4g (Galaxy S1) - CM7, CM9, CM10, CM10,1
Galaxy S3 Sprint- CM10, CM10.1
Galaxy S4 Sprint - CM10, CM10.1 and now CM10.2

That's very interesting. CM... I ended up sending the phone to LG to fix. I have a GS2 now so I gave the phone to my father. It runs great now.

sulotion to screen not waking up on cyanogenmod
I was having the same problem on my Samsung Galaxy note 2. I'm running cyanogenmod 11. I solved the issue by going into setting then display and lights and unchecking proximity wakeup. I hope this can help someone else.

Thank you a lot man! I was really in panic mode.

Not Waking up
This problem started once I have upgraded to official Lollipop. When I press the power button, the screen doesn't wake-up immediately. I had to press many times the power button to get the screen comes.

Weirdest display issue

Hey guys,
I have a really strange display issue with my Galaxy R.
I'm on CM10.1 nightly and already tried different nightlies with factory reset and wipe data/cache.
If the phone is not used for a while (sometimes even after 30 minutes), meaning it is on and screen is off, the display won't turn on anymore.
So I press the power button and the capacitive buttons light up, but the screen stays completely black.
Today I noticed that I can even use the touch screen and I could hear all sounds, I even managed to open the dialer and start typing blindly and it would make the dial sounds.
But whatever I try, the screen won't turn on.
Also, it seems when I'm connected to a charger and/or connected to wifi, this problem doesn't seem to occur.
Then I have no choice but to remove the battery, but then often I can't even start the phone.
Sometimes it takes some minutes, sometimes a really long time until I can start it again.
Usually the battery isn't drained, this only happened once.
This occurs after I dropped the phone twice, so it might be related to that.
(Though before I've also dropped it and this never happened.)
Any ideas?

flash stock ics and see if problem persists.
once i flashed a custom rom and faced this issue, reverted to stock and now my device is running with zero issues.

Nikhil said:
flash stock ics and see if problem persists.
once i flashed a custom rom and faced this issue, reverted to stock and now my device is running with zero issues.
Click to expand...
Click to collapse
I tried to find the stock rom online, but all links seem to be down.
Do you know where I can get it?

wasabah said:
I tried to find the stock rom online, but all links seem to be down.
Do you know where I can get it?
Click to expand...
Click to collapse
You need to register and then download from here.

Thanks for that, I installed newest stock rom.
Could boot fine, set up the phone, put it to the side.
One hour later I checked it - same problem again.
Capacitive buttons flaring up, screen not.

Thanks for that, I installed newest stock rom.
Could boot fine, set up the phone, put it to the side.
One hour later I checked it - same problem again.
Capacitive buttons flaring up, screen not.

Then you should visit SSC. They can only repair your device.

Black screen & no recovery!!!!

Hi all !!! Sorry for my English but I need your help
I commented what is happening with my phone N5 (which for good and evil is always stock without root or anything, with corresponding OTA updates.)
1- Yesterday afternoon at lunchtime while reading a book in playbooks, I notice that suddenly disappears one line and then appeared intermittently. I close the app and noticed the same thing happening on the screen menu. I shut down the cell and turn on again and I thought it must be an application be kidding. But still does.
2 Also yesterday I happened to change the security on the phone screen. After a while of normal operation, try to turn it on the screen with the button, nothing, the screen goes "black", with light and retrolight turned on but no picture no nothing .
Called the cell to see if it works or is turned off and the phone rings but the screen nothing. Try turning it off and on again by holding the on / off / lock button and the phone restarts, but the screen nothing. In one such attempt to do the above it is seen that managed to turn it off. And I get it on and do a normal boot, except that the picture of my screen is changed to the original. Change the lock screen which was previously using (slip). And it seemed that out or some conflict with the lock. In one of those again pressed the ON / OFF / lock as would normally and it starts all over again.
After I magically back to life, I want to make a full wipe as I think it should be an app that is doing some conflict or something. BUT ....
3I turn off the phone and then press the keys VOLUME UP / DOWN and ON / OFF is normally off, squeezed the first screen with the options but options RECOVERY / BOOTLOADER appears in red I choose RECOVERY give the ok with the key and .... andriod robot appears with the legend below that says something (I do not remember well) without or without controls options appears. So its seems thatI dont have recovery.
After that keep pressing the key ON / OFF and the phone turns off and / or reboot normally. All this I did it again to see if the error reappears and looks that I do not have recovery.
The failure of the screen is increasing. I dont know if they are separate problems or is it all the same problem.
Sorry if I was too long but I need the help of you.
UPDATE Now it seems that the screen died, since I do not achieve to turn it on as before, the light and the retrolight its ok. The phone receives calls and notifications but the screen stills black.
Thanks all.
Matias M 73

the android laying on its back IS the atock recovery.

simms22 said:
the android laying on its back IS the atock recovery.
Click to expand...
Click to collapse
thank you simms22 but I need to fix or understand what happend with the screen first.
:good::good:

Matias M 73 said:
thank you simms22 but I need to fix or understand what happend with the screen first.
:good::good:
Click to expand...
Click to collapse
sometimes things just "derp". itll happen more often if you dont reboot your phone often. also, your phone will be a little bit more responsive if it gets reboot once a day or two.

RMA or fastboot it back to stock, if the screen doesnt turn on afterwards then it looks like a hardware issue, open device and reconnect the display.

republicano said:
RMA or fastboot it back to stock, if the screen doesnt turn on afterwards then it looks like a hardware issue, open device and reconnect the display.
Click to expand...
Click to collapse
Thank you Republicano!!
I think too that its a hardware issue. I already see on you tube problems like mine.
Thanks again!!

Galaxy s6 soft keys flashing

Hi guys,
My girlfriend has a galaxy s6 running marshmallow. The soft keys are constantly flashing/blinking whenever the screen is turned on. This also causes the device to lag, draining the battery.
I've tried factory resetting the device, and running it in safe mode suggesting it's not software related.
I also installed the the app "Galaxy button lights" that allows the control of the lights, this does stop them flashing, but the device still seems to be running slowly.
Thanks for any advice in advance.

Hi did you find a solution to this as I am having the same problem. Power mode on stops the constant flashing but the phone still lags and it flashes when I charge my phone. My power button also phantom presses :/

I have the same problem. Did you find a solution?

Me too. Turning off the buttons seems to help... it drives me less crazy... but it still feels like there is screen lag. I think this started after I installed the last system update.

One of my co-workers suggested that it may be caused by moisture inside the phone. I set it in the sun for a while, and the problem seems to have gone away.

nhusby said:
One of my co-workers suggested that it may be caused by moisture inside the phone. I set it in the sun for a while, and the problem seems to have gone away.
Click to expand...
Click to collapse
This happened to me like 4 months ago, it hasn't "dried" till now However if i press hard on the lower left bezel - next to the app switcher button my phone works. I have a theory that the contact has become loose under the phone or so?

Hi, I have the same problem for a long time I installed a couple of firmware and the same thing on the factory software always happens, now I use custom rom and it works without problems, it means only on the factory versions I have a problem

Help - My new SM-G930W8 S7 hangs on wake

Now this doesn't happen all the time every time, but usually around a notification and the screen is off, I go to hit a button to turn on the phone and it doesn't respond but the touch-keys are backlit. If Always-on Display is on, the screen is black regardless, not even showing the time or notifications. The only fix is waiting ~10 seconds for the phone to respond, which in some cases can be the difference between a missed call.
Now, seeing Always On Display off like that while it should be on made me think back to when I saw some sort of Nougat optimization setting that allowed me to select Always On Display, and as far as I remember, I did. That makes me think this process is killing AoD and it is taking that long to start back up, where the phone won't unlock until AoD (is back on and) can confirm that it's trying to wake up out of that state.
However, I don't believe this is the issue. I have turned off AoD and the issue still happened directly afterward, after a Messenger notification. This is stock firmware, however it is not factory firmware. I believe I downloaded it from Sam-Mobile, and they had the 7.0 Nougat upgrade that I would have gotten OTA with the factory firmware anyway.
Somehow I don't think it's the flashed firmware that is the problem, however please let me know if that's a possibility.
While the phone (or whatever) is hanging, I can still hold down the power button and I will feel haptic feedback as if the power menu has opened, and when the phone responds the power menu will be open, so the phone does still receive input. It just doesn't seem to act upon it or wake the screen properly. Is this perhaps merely a known Nougat bug or is it a glitch with my flashed stock firmware?
I'm sorry I don't have much more information. I do have Greenify, but I don't think that can or is set to disrupt anything that would affect the phone waking, or that would hang the OS, homescreen or whatever it is.
I haven't done other troubleshooting because I don't know what direction to attack this from, and that is why I have come here.
Help please!
Thanks in advance. :good:

UPDATE: It seems to happen directly after my screen shuts off from being on. So, if a notification wakes my phone but I don't interact with it in time and the screen goes off, when I press the power button it won't respond for ~10-15s. That's all I've really noticed... Anyone else have this problem??

BUMP.
Also, the same thing happens if I press the power button on my phone (by accident) and then go to turn it back on almost immediately - it won't respond for a while.

Cleared cache from recovery?
Got any settings enabled like "Keep screen off" which stops the screen coming on in your pocket, try disabling it in case that's causing it
Different gestures, disable them all in case they're messing with it
Last resort, factory reset

*Detection* said:
Cleared cache from recovery?
Got any settings enabled like "Keep screen off" which stops the screen coming on in your pocket, try disabling it in case that's causing it
Different gestures, disable them all in case they're messing with it
Last resort, factory reset
Click to expand...
Click to collapse
Won't be factory resetting unless I plan to root or something. I'll fiddle with the keep screen off setting that I do have on, and I highly doubt gestures would affect it but regardless I haven't enabled or used any. Thanks for the reply.

So the "Keep screen off" setting didn't affect anything. I turned Always On Display back on and I see the same issues. However, now sometimes I notice when I lock my screen or it shuts off, sometimes the AOD will appear and then quickly disappear, and stay in this hanging state for 10-15s. Then, if I haven't touched it during that time, the AOD will reappear. Any ideas? :/

So nobody else has this issue? This is still a problem, even if I press the power button and sometimes I'll want to turn it back on again as I just remember something to do before putting the phone away, it hangs on black for too long to be useful in that moment. The only potential solution is a factory reset?

Even if I lock the screen... If I try to turn it back on too soon, and I think it's specific timing... I have to wait 10-20 seconds. Sounds and vibrations still work.

UPDATE: This is still an issue. I've noticed a few more things, it does really seem like timing and as if there's some function in my phone literally not allowing me to turn on my screen - and I have never timed it but I think pressing buttons (power button) makes it take longer before it will respond again.

Kilva said:
UPDATE: This is still an issue. I've noticed a few more things, it does really seem like timing and as if there's some function in my phone literally not allowing me to turn on my screen - and I have never timed it but I think pressing buttons (power button) makes it take longer before it will respond again.
Click to expand...
Click to collapse
This happens for me also as a point of interest.
I am hoping that O solves it, since the monthly updates have never helped.

I haven't had this happen since upgrading to Oreo a week ago, so far so good!