I just upgrade my two systems to buster and experience on both systems
now frequent (not always) crashes when login in using sddm.
The screen gets black, the cursor blinks in the upper left corner but
nothing happens.
Killing X/sddm with Ctrl+Alt+Backspace helps and makes sddm reapper.

There is a promising update to the package in version 0.18.1:
 "Fix crashes when creating a user session", cf.
https://github.com/sddm/sddm/blob/v0.18.1/ChangeLog

This version is however only included in bullseye / unstable, yet
installing that would require additional library updates
(libqt5core5a, libgcc).
I would like to stick to the buster stable release.

Judging from the upstream changelog, I recommend considering updating
the buster sddm package to the bugfixed 0.18.1 upstream version.
I would be happy to test a 0.18.1-1 package built for buster.

Thanks for all your work,
Ralf

Hi,

I compiled the bullseye version of sddm (0.18.1-1) without any changes
for my buster systems and the crashes seem to have gone away.

So I repeat my wish to consider updating sddm in buster.

Thanks for your work,
Ralf

tags 956325 buster
fixed 956325 0.18.1-1
thanks