#893624 sddm is unusable in environments with large number of users

Package:
sddm
Source:
sddm
Description:
modern display manager for X11
Submitter:
Dmitry Torokhov
Date:
2026-10-13 02:23:02 UTC
Severity:
important
#893624#5
Date:
2018-03-20 16:30:47 UTC
From:
To:
Dear Maintainer,

In the newer versions of sddm (starting with 0.15) the greeter's UserModel
code is trying to de-duplicate user entries, and is doing so using O(n^2)
algorithm, which in large organizations means that the process takes about
an hour. User is simply presented with a black screen with mouse cursor.

There is a fix upstream:

https://github.com/sddm/sddm/commit/0edc3ffe15f2cdd89da40f4c830da8860bd9a13e

Please consider pulling it into distribution release(s).

Thanks,
Dmitry
#893624#10
Date:
2026-10-13 02:15:03 UTC
From:
To:
Version: 0.18.0-1
This commit was included with the new upstream release. Closing
this bug report accordingly.

Best,
Boyuan Yang