Touchscreen unresponsive on lock screen (after wake) - Xperia SP Q&A, Help & Troubleshooting

Had my SP two days now and on two separate occasions I've used the power button to wake the phone and the screen has been completely unresponsive. The hardware buttons have worked perfectly - I've been able to take photos and display the Power Menu for example - but I haven't been able to use the touchscreen at all - so I haven't been able to select anything from the Power Menu.
I've ended up having to remove the SIM card to get the phone to reboot - otherwise I'd be waiting for the battery to die.
Anyone else had similar problems - or can maybe suggest an alternative way to reboot the phone in this situation... I'd normally just whip the battery out... but that's obviously not an option.
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The button on the back that says off next to it.
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Possible all n1 will be die?

To all friends who using n1.. im have about 1 question.... could be all n1 will be die brcause power button issue????? I really love my n1.. so afraid my device will die because of that.... anyone have answer? Or its just defect device who counter that problem?
Sent from my Nexus One using XDA App
Best suggestion I can give you is to get root and use a ROM with trackball wake/unlock. This will reduce the use of the power button to almost nothing. You could also then use quick boot to allow reboot to recovery, bootloader or normal. All without touching the power button ever.
Some devices have faulty power button. Some don't.
I don't know how lucky you are with your device, and I don't know how gentle you are with the power button, so it's impossible to tell if your power button will fail or not.
In any case, as suggested above, using trackball wake can lower the chances of it failing.
U said some have some dont... that mean not all could possible became faulty.. usually how long the device became faulty? 4 month? 6 month? Or over 1 years? Currently im using widgetlocker to unlock via trackball...
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I have had mine since about a week after release. My power button is still like new. I have never had to push it twice to do the same thing.
Mine broke about a month ago, i bought ti a couple of weeks after release.
I used quick boot to reboot it, screen off and lock app to turn the screen off, trackball wake to turn it on. And if you need to turn the phone back on, you can plug it into power and pull the battery a few times.
Power button is fine after a year. But I avoid it as much as possible by using Quick boot, Lock, & Trackball wake.
That mean all possible became faulty!!. Right now im avoid it using power button.. i use widgetlocker and screen off and lock free on market.it help me to turn off screen without touch ur power button
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It's kinda strange, I keep hearing of these issues with the power button...
I had to have dropped my N1 at least 5 times straight on the power button. Almost split the device in half one time doing it. Power button never failed on me, nor did any other hardware come to think of it. And I still sold it. lol.
are-red said:
That mean all possible became faulty!!. Right now im avoid it using power button.. i use widgetlocker and screen off and lock free on market.it help me to turn off screen without touch ur power button
Sent from my Nexus One using XDA App
Click to expand...
Click to collapse
It IS a possibility that your power button will go bad. It is a possibility it may not. No one can say for sure that, yes your power button will quit working. The less you physically push it, the longer it will last, obviously.
Mines been fine and I've been using it regularly since April, I think the issue affected more of the early Nexuses than the later made ones.
My power button is starting to lose it's functionality and I am sad about it. It's still usable but my alternatives is using quickboot, trackball wake, and lock screen app. I barely use my power button now.
Jep4444 said:
Mines been fine and I've been using it regularly since April, I think the issue affected more of the early Nexuses than the later made ones.
Click to expand...
Click to collapse
Mine is an earlier model. Bought the 2nd week available, but no problems as of yet.
Maybe..not all device could be became faulty because of power button... take good care ur n1 dude...
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[Q] Turning on the phone without using Power button.

Hi, everyone!
Recently, I installed CyanogenMod 7 which is probably the reason of damaged Power button. I've been keeping it pressed for a long time with X/camera/volume up etc. Anyways, I've been using it for nearly a year now, so.. I still have warranty, but it's not the case. Since I don't want to send it back yet, I come up with this question.
How to power on my Milestone WITHOUT using power button whatsoever? Even entering bootloader mode requires me to press it. Any ideas?
Even impractical ones, I don't turn it off very often, but I need to know that in case of emergency..
tried plugging it into a wall charger while its off? it always boots up my droid automatically
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Oh, thank you. As far as I remember, it happened to me several times, but mosstly - there is just waving battery icon.. thanks for response though!
Additionally, how to lock screen without using Power button?-.- or access sound/flight mode/turn off menu?
cm7 has status bar toggles for all of that, if you still have it installed. dont know if theres any way to access the regular phone options menu without using the power button though, sorry
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Well, I turned on status bar widgets and Locking widget too, but.. it apparently disables auto-locking screen, instead of locking on demand..
The go to sleep status bar widget in cm7 interface settings. That's the one that shuts off the screen and locks the phone. Tried it myself before posting.
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Geez.
I apologize for caused confusion, I didn't notice it at first... I set my volume up/down as waking buttons and widget for going to sleep
Awesome support, splashattack, thank you very much!
I am having same problem.
I connect my cell to my laptop and it starts. I am using custom ROM.
I want to rollback to stock, so that I can avail warranty on it.
Any idea how to enter bootloader mode without power button
I tried terminal emulator
su
reboot recovery
Click to expand...
Click to collapse
But it reboots to OR not to bootloader.
Any solution for bootloader ? or any command?
EDIT
Its solved. I have assigned volume rocker for screen unlock,
I rebooted it using terminal emulator, Pressed and hold volume rocker + Dpad - up and I entered bootloader.
i am always thinking that a button at the front would have been great in order to unlock the phone easier....
try button remapper

Just an FYI

So I am a crack flasher and sometimes my phone locks up in aroma installer when flashing a ROM. I noticed sometimes when my phone locked, there wasn't a thing I could do to reboot it (holding power button or holding power+volume down). I would actually have to wait for the battery to die....it would piss me off! I finally found a fix for this. If your phone is locked up and won't reboot, put the phone up to a bright light and hold the power+volume down buttons for 8 seconds and poof! Your phone will reboot, just thought I would share this as I found this method VERY useful!
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Is the light really necessary? I got stuck in Aroma and just held power for about 12 seconds and poofed.
via sexy phONE.
Blackcircle said:
Is the light really necessary? I got stuck in Aroma and just held power for about 12 seconds and poofed.
via sexy phONE.
Click to expand...
Click to collapse
It doesn't work for some. Another option is to connect your phone to a computer and adb reboot
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Blackcircle said:
Is the light really necessary? I got stuck in Aroma and just held power for about 12 seconds and poofed.
via sexy phONE.
Click to expand...
Click to collapse
Sometimes it is, trust me...I've gone as far as tying hair ties around the power button so the softkeys blink to help the battery die....and sometimes the adb reboot does work but right now my computer is non functional so it does no good for me
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http://forum.xda-developers.com/showthread.php?t=2293429
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Or, use the volume controls to navigate and power to select. Never freezes using buttons.
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Just my :2cents:
Holding down the power button on most, if not all electronics will eventually power it down. It's a safety built into devices that you're unable to remove the battery from.
aside from using the volume and power buttons, boot into fastboot and erase cache before flashing. And waiting a few seconds in between making selections in aroma and after the initial load into aroma installer. I haven't had a single aroma lockup yet.

Power button not working??

My phone started to act really strange today. When i press power/lock button it wont lock it turns off phone immediately. Sometime it just gives powers screen (wher you can turn off,restart or go in airplane mode). Butt its really strange. I can turn off my phone only if i unplug battery.
So the problem is that when i press power/lock button it will restart or wont happend anything.
Im long on this ROM and its not problem with it. I tryed go on stock ROM and same thing happends.
Anyone have some suggestion ?
Sent from my GT-N7000 using xda app-developers app
UrosNBG said:
My phone started to act really strange today. When i press power/lock button it wont lock it turns off phone immediately. Sometime it just gives powers screen (wher you can turn off,restart or go in airplane mode). Butt its really strange. I can turn off my phone only if i unplug battery.
So the problem is that when i press power/lock button it will restart or wont happend anything.
Im long on this ROM and its not problem with it. I tryed go on stock ROM and same thing happends.
Anyone have some suggestion ?
Sent from my GT-N7000 using xda app-developers app
Click to expand...
Click to collapse
Try 2 hold 8 seconds on power button, if this phone will reboot - it's software problem. Just flash a new firmware LT6 for ur phone.
If it does not work, try 2 disassemble ur phone, and watch area nearly power button. If it's damaged go 2 service.
My opinion plastic nearly power button area is damaged, or this is firmware trouble in UI.
Nothing happend after 8 sec's
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Sometimes button works but must of time not
Sent from my GT-N7000 using xda app-developers app
Who problem power button can't lock Can't root ....
You just chang your hard drive
Note: it work on gt-n7000 company. If you chang it incorrect your phone can't power on or reboot.

Screen or backlight doesn't turn back on

looks like i got a lemon, screen will not turn back on however device continues to function. The touchscreen even works but you can't tell what you are clicking on.
Only way to get back to functional is to pull the battery, only happened once last week but in the last two days i've had to pull it 6 times or so.
Just posting this up in case someone else starts having the same problem. I've got a replacement being shipped out this week.
You are not the only one. Mine does it from time to time
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Has any one had problems with maps as well
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I might have had this happen last night. Black screen, buttons lights would only flicker once quickly when pressing the power button. Pressing and holding the power button did not cause a reboot. I did not try any screen action as I could not see anything. Had to pop the battery to get the device back to working.
--pat
I got my replacement, and it still does seem to have this bug to some extent, however, this phone seems to be able to get out of the screen black if something else triggers it.
For instance, I got a phone call, and that brought it out of the black-out. Another time i just kept pushing buttons and it finally woke up.
Hopefully it's just a software bug??

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