https://bugs.kde.org/show_bug.cgi?id=408817
Bug ID: 408817
Summary: Second monitor not recognized
Product: kwin
Version: 5.15.5
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: ci3...@gmail.com
Target Milestone: ---
SUMMARY
I have a Thinkpad T470 with a docking station. When I plug in the laptop the
second screen is not recognized with kwin_wayland. With kwin_x11 everything
works.
STEPS TO REPRODUCE
1. Disconnect laptop from the dock (and second screen).
2. Start Wayland session (per SDDM). Everything works so far.
3. Plug in the laptop into the dock.
OBSERVED RESULT
Nothing happens (except that the battery is loading now and the network changes
to Ethernet).
EXPECTED RESULT
Second screen will be recognized. Monitor setup will be shown.
(If I go into the System Settings the monitor is also not recognized.)
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Gentoo, Kernel 4.19.27, Kwin 5.15.5 (I'll update it ASAP).
(available in About System)
KDE Plasma Version: 5.15.5
KDE Frameworks Version: 5.58.0
Qt Version: 5.12.3
ADDITIONAL INFORMATION
With kwin_x11 the second monitor works without problems. The Plasma version
before 5.15.5 the problem was the same. If you say me how to debug Kwin to get
more infos, I can do this. If there is some info utility about wayland multi
monitor I can run it and post the infos. Here is the only info I have found per
weston-info:
interface: 'wl_output', version: 3, name: 30
x: 0, y: 0, scale: 1,
physical_width: 310 mm, physical_height: 170 mm,
make: 'N140HCA-EAB', model: 'eDP-1-unbekannt',
subpixel_orientation: unknown, output_transform: normal,
mode:
width: 1920 px, height: 1080 px, refresh: 60.008 Hz,
flags: current preferred
This is the only wl_output section and belongs to the internal display. My
secon d monitor is a Dell U2715H with 2560x1440. With GNOME Wayland the display
is also recognized.
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