https://bugs.kde.org/show_bug.cgi?id=501126
Bug ID: 501126
Summary: Keyboard being detected as a game controller
Classification: Plasma
Product: plasmashell
Version: 6.3.2
Platform: NixOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: david.baked...@passinbox.com
CC: k...@davidedmundson.co.uk
Target Milestone: 1.0
SUMMARY
My keyboard shows up in the "Game Controller" section of System Settings, with
the first axis reporting a constant -32768 (left stick all the way left). Some
games like "Heroes of Hammerwatch" detect this input and you get stuck walking
left forever.
The only 2 keyboards I have tested this issue with are both ZSA-brand split
keyboards running QMK firmware: an "Ergodox EZ" and a "Moonlander".
For me the Ergodox is shown in the Game Controller dropdown as "ZSA Technology
Labs Ergodox EZ System Control" in /dev/input/event21
STEPS TO REPRODUCE
1. Have a keyboard plugged in via USB (possibly ZSA keyboards specifically) and
NO game controller connected
2. Go to System Settings > Game Controller
3. Check the dropdown at the top of the settings panel
OBSERVED RESULT
The keyboard is found listed as a game controller with "Axes 1" reporting
-32768
EXPECTED RESULT
The keyboard shouldn't be detected as a Game Controller
SOFTWARE/OS VERSIONS
Operating System: NixOS 25.05
KDE Plasma Version: 6.3.2
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Kernel Version: 6.13.5 (64-bit)
Graphics Platform: X11
Processors: 16 × Intel® Core™ i7-10700K CPU @ 3.80GHz
Memory: 15.5 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 3070/PCIe/SSE2
ADDITIONAL INFORMATION
There is a Reddit thread where a few people have reported similar issues:
https://www.reddit.com/r/kde/comments/1iqfqss/kde_thinks_my_keyboard_is_a_gamepad/.
I'm running NixOS unstable, rolling back to a previous version fixes the issue
(no keyboard shown in "Game Controller" and no stuck moving left issues)
I don't currently have a non-ZSA keyboard to test this with but the above
reddit thread shows a "ProjectD" keyboard which also uses appears to use QMK
firmware.
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