Detect Linux touchscreens for multitouch auto mode - #5830
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August 13, 2026 08:17
multitouch_active 1 already meant "if available", but SDL_GetNumTouchDevices is often zero on Linux until the first finger. Scan sysfs, distinguish touch-only devices from convertibles with a keyboard, and expose Off/Auto/ Always plus that filter in the touch settings dialog. By creating a pull request in stk-code, you hereby agree to dual-license your contribution as GNU GPL v3 or later and Mozilla Public License v2.
Windows/macOS keep the previous hasHardwareKeyboard default so Auto mode does not treat every desktop as a phone.
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By creating a pull request in stk-code, you hereby agree to dual-license your contribution as
GNU General Public License version 3 or any later version and
Mozilla Public License version 2 or any later version.
This includes your previous contribution(s) under the same name of contributor.
Keep the above statement in the pull request comment for agreement.
Summary
multitouch_active1 already meant "if available", butSDL_GetNumTouchDevices()is often 0 on Linux until the first finger./proc/bus/input/devices(and DMI chassis / Ubuntu Touch) so Auto works on Linux tablets.multitouch_touch_only(default false, so current "any touchscreen" behaviour is unchanged) and Off / Auto / Always in the touch settings dialog.IrrDriver::isMultitouchEnabled(), replaces the repeated 3-line check.We ship a tablet build at SuperTuxKart-Touch that turns the touch-only filter on by default. This PR is only the detection layer, not that product overlay.
Test plan
multitouch_touch_onlyon.Made with Cursor