On 24.03.19 19:35, Udo Richter wrote:
I experience this behavior in most cases when light-locker kicks in as screen saver. Closing the lid or suspending never triggers this. i965 driver on Sandybridge CPU. Ctrl-Alt-F6-F7 brings me to a screen-is-locked display, and after some seconds, to the actual login prompt. Bug appeared after upgrading from stretch a few months ago.
Some more infos after living with this bug for a year: - The bug can be instantly triggered with xdg-screensaver lock - One new workaround seems to be to use a backport kernel (atm thats linux-image-5.4.0-0.bpo.2-amd64) - The workaround with Ctrl-Alt-F7/F8 worked for me usually. - You can also blindly type your password, and the screen will be back after unlocking - Be aware, if you're too fast after screen lock, the screen might unlock without password prompt and without screen being back on. That way I corrupted a password by typing it blindly into a messenger. ^^' - If the screen is locked quite long (like >30min), screen may wake up by mouse move again. I'm now testing the backports kernel. First test looking good, I'll report if I notice anything new.
