When locked, my laptop (Ideapad Y510P, with proprietary Nvidia drivers installed) screen just turns off. The laptop is still on, but I cannot access the lock screen to unlock. The only thing I can do is push the power button, which will shutdown the system. I cannot access a tty, and is unresponsive. My GPU is a GT750M. Is there any way I can fix this?
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Did this happen with the FOSS drivers as well? How did you install the proprietary nvidia drivers?– embikJul 19, 2015 at 18:46
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This appear for me on t420 with loki too. With Logout.– vrcmrJul 11, 2017 at 9:25
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2 Answers
Run
sudo -i scratch-text-editor /etc/default/acpi-supportFind and change
POST_VIDEO=truetoPOST_VIDEO=falseFind and change
SAVE_VBE_STATE=truetoSAVE_VBE_STATE=falseRestart your laptop, issue should be solved.
Source:Blog, Ubuntu Launchpad, Worked on mine.
answered Jul 19, 2015 at 19:07
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This works under a certain condition for me. If I suspend the laptop at least once after it has been started up, then the lock screen issue does not come up. If this was not done, then I run into the same issue. Once I get the black lockscreen, the laptop is still running (the power light is one, and I can hear the fans), however I cannot suspend by closing the laptop lid. I can only shut it down using the power button. If I do happen to suspend at least once after start up, then the lock screen seems to work perfectly fine, no black screen.– DaichiJul 20, 2015 at 14:56
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This worked for me. I'm running Advanced Micro Devices, Inc. [AMD/ATI] Oland [Radeon HD 8570 / R7 240/340 OEM] GPU in a Dell OptiPlex 9020– user4543Mar 21, 2016 at 20:11
Alternately you can type the login password and click enter when you see the black screen.
