debian installer screensaver issue - screen redraw broken after unblank


Renowned Member
Mar 5, 2019

i'm curious that there is so few information around about this issue, as i have seen it here and there and not only with debian11/12

when installing debian (gui mode) and you are away from keyboard intermittendly during installation and the screensaver kicks in - the screen is rendered unusable and only parts of it may refresh, by moving the mouse. depending on which dialog your're at, you can start from scratch....

who else knows about this issue and would like to provide information since when this exists ? i guess this is qemu or x11 generic (or maybe builtin vnc) problem and not proxmox one.

we have a bugzilla ticket open for this, but i'd like to get to more information , which may help resolving it.

it really starts to be a pain in the neck

here is an example screenshot.

after screen blanking, moving mouse or pressing keyboard will not unblank the screen - you need to mouse over specific regions which may eventually refresh then.
in this screenshot, the buttons below still need "redraw" and i did not move mouse to the bottom yet...

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i only ever saw this in the debian 12 installer, so i assumed it was a problem there (e.g. with their x11 server) can you reproduce this on any other live cd/os ?
@dcsapak , i retestet and you seem to be right, i can only reproduce with debian12 installer. did not retry any other debian12 based distro yet

i was quite sure i had seen that bevor debian 12, but i cannot reproduce for now


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