https://bugs.kde.org/show_bug.cgi?id=395306
Bug ID: 395306
Summary: AMD GPUs changed screen wakeup behavior, kde assumes
old behavior
Product: plasmashell
Version: 5.12.4
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: Multi-screen support
Assignee: aleix...@kde.org
Reporter: mariusz.g.ma...@gmail.com
CC: plasma-b...@kde.org
Target Milestone: 1.0
Full explanation of the issue here:
https://bugs.freedesktop.org/show_bug.cgi?id=106529
Short version: when using recent amd gpus with recent kernels, the behavior
when waking up monitors is to (I suppose) mark them as disconnected until they
fully wake up. This is a serious problem for multi-monitor setups, since if the
primary monitor wakes up more slowly then any of the secondaries, then plasma
will for a few hundred ms switch the primary desktop to one of the secondary
monitors, then switch back when the actual primary monitor wakes up.
This looks like crap and tends to misbehave regularly (windows change their
position, plasmoids occasionally get misplaced).
Since the kernel bug report got ignored for the past month, I must assume
that's just how amdgpu driver will behave going forward. Which means the only
place that can mitigate the issue is the DE.
Can KDE mitigate the issue (by, dunno, adding 500ms of delay before switching
primary displays, or something)?
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