https://bugs.kde.org/show_bug.cgi?id=509516
Bug ID: 509516
Summary: Hi-res scroll events aren't passed through to nested
kwin-wayland
Classification: Plasma
Product: kwin
Version First 6.4.5
Reported In:
Platform: NixOS
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: libinput
Assignee: kwin-bugs-n...@kde.org
Reporter: andre.vma...@gmail.com
Target Milestone: ---
SUMMARY
I'm running NixOS unstable plasma 6.4.5 on host, and another NixOS unstable
systemd-nspawn container, to which I bind wayland socket, export
WAYLAND_DISPLAY in the container, and startplasma-wayland a full nested plasma
session; desktop shows up in a nested window, which I make fullscreen and
disable global shortcuts in host (so it receives all inputs when focused); I
can still go back to host by switching desktops with 3-finger gesture; it works
surprisingly well, except for some smaller issues:
In this case, when looking at kwin's console Input Events, I can see both
Delta=15, Delta(V120)=120 events when scrolling; but if check in the nested
kwin, I see Delta=15, Delta(V120)=0
Most apps work fine with just the low-res events, but some (e.g. Zed Editor)
look only at the V120, and scroll doesn't work.
STEPS TO REPRODUCE
1. Launch nested kwin session
2. Open kwin debug console
3. Check Delta(V120)=0 for scroll events
OBSERVED RESULT
Delta(V120) (hi-res scrolling events) are passed as 0
EXPECTED RESULT
Events are passed as is
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.4.5
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
ADDITIONAL INFORMATION
I'm using a Logitech MX Anywhere 3S mouse over bluetooth, which is supposed to
have hi-res scroll, but I never managed to make it detect high resolution
support (as per libinput debug-events)
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