https://bugs.kde.org/show_bug.cgi?id=500124
Bug ID: 500124
Summary: KWin overrides drawing tablet orientation
configuration whenever adding a tablet
Classification: Plasma
Product: kwin
Version: 6.3.0
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: libinput
Assignee: kwin-bugs-n...@kde.org
Reporter: ar...@aarsen.me
Target Milestone: ---
SUMMARY
After plugging in a drawing tablet, KWin loads its configuration, applies its
orientation, but then, shortly after, calls Connection::applyScreenToDevice,
which does device->setOrientation(Qt::PrimaryOrientation), thereby overriding
the previously read orientation config.
My tablet is not a display tablet, so its orientation is not tied to a display.
I have it rotated so that it fits on my desk better. I suspect the call above
is not really applicable for drawing tablets without screens in them.
I've used GDB to narrow down that the applyDeviceConfig and applyScreenToDevice
calls in processEvents' LIBINPUT_EVENT_DEVICE_ADDED case set the correct
orientation (the one in the config file) and reset the orientation,
respectively, in kwin/src/backends/libinput/connection.cpp.
STEPS TO REPRODUCE
1. Plug in a tablet
2. Set its orientation to something other than PrimaryOrientation
3. Unplug and plug the tablet back in
4. Observe the orientation
OBSERVED RESULT
Orientation is reverted to default
EXPECTED RESULT
Orientation is kept as what I set it
SOFTWARE/OS VERSIONS
Operating System: Gentoo Linux 2.17
KDE Plasma Version: 6.3.0
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.2
Kernel Version: 6.6.74-gentoo-dist (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 3800X 8-Core Processor
Memory: 62.7 GiB of RAM
Graphics Processor: AMD Radeon RX 6700 XT
ADDITIONAL INFORMATION
The tablet is a One by Wacom CTL-672, but I doubt this is relevant.
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