https://bugs.kde.org/show_bug.cgi?id=385321
veeh...@zoho.com changed:

           What    |Removed                     |Added
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                 CC|                            |veeh...@zoho.com

--- Comment #9 from veeh...@zoho.com ---
i've been seeing this for a while (Fedora 34-36) and put it down to a few
things that I can't isolate easily.

Dell XPS13 9305 laptop (i5-1135g7) with built-in 4k screen on it's own works
fine 100% reliably.
While the laptop is in sleep, if i connect or disconnect either the official
Dell USB-C HDMI&USB dongle, or the Dell WD19TB dock with a 27" 2560x1440 screen
then I'll see this issue maybe 80% of the time. being dongles/docks then i know
there's multiple pieces of hardware being added/removed: display, audio, usb,
etc etc.

if i do not change these connections while in sleep state then it appears
reliable so it's like the screenlocker cannot handle a change in hardware while
in a sleep state.

there also appears to be some sort of delay too; if i try to reproduce the
issue with only a few seconds/minutes in sleep then the issue does not occur.
if i leave it hours/overnight then the issue seems far more common.

I've no issues if i connect/disconnect the dock/dongle once the session is
unlocked.

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