https://bugs.kde.org/show_bug.cgi?id=476538
Bug ID: 476538
Summary: External monitor corrupted under Plasma Wayland
Classification: Plasma
Product: kwin
Version: 5.27.6
Platform: NixOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: robg...@gmail.com
Target Milestone: ---
Created attachment 162855
--> https://bugs.kde.org/attachment.cgi?id=162855&action=edit
Garbled external screen
SUMMARY
External monitor corrupted under Plasma Wayland on a Thinkpad W520.
STEPS TO REPRODUCE
1. Start with a Plasma Wayland session
2. Plug in and enable an external monitor
OBSERVED RESULT
Monitor renders a garbled viewport. It looks like successive scan-lines are
offset horizontally, so there ends up being five repeating columns going across
the display.
EXPECTED RESULT
Screen renders normally.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.9
Kernel Version: 6.1.44
ADDITIONAL INFORMATION
The hardware is a Thinkpad W520 with an Nvidia Quadro 1000M graphics card (I
think equivalent to a GTX 540M), and Intel integrated graphics, dating to
around 2012. Graphics driver is the open-source Nouveau.
The problem doesn't manifest under X11, or under Gnome's Wayland session. It
seems to be specific to Plasma Wayland. I'd like to use plasma with wayland
here if possible, just because X tears particularly badly on this hardware.
Here's a link to a video I took of the bug:
https://photos.google.com/share/AF1QipPFOuyyz1oouAEAAkqAl95eaC-B0yLuvVfGddCl9-Q5c0Q9N5ipwPCPxcSm8ZCQUQ?key=NDRxNkF5Vm1vZWF3T1hUX2I1Rk8yckpWMm9FVERR
Interestingly, while everything else gets skewed across the screen, you can see
the mouse cursor isn't effected. It stays contiguous the whole time.
So far I've only seen this bug on this hardware running plasma wayland. With
that configuration it's manifested on every monitor I've tested so far.
Changing resolution doesn't fix it; the resolution does visibly change but the
view's still garbled. Interestingly, setting the overscan option results in
contiguous black bars on the screen border, rather than the bars getting skewed
across with everything else.
--
You are receiving this mail because:
You are watching all bug changes.
