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If a touch goes past the fixed pressure threshold it is labelled as a palm and stays a palm. Default value is one that works well here on a T440 and is virtually impossible to trigger by a normal finger or thumb. A udev property is exposed so we can handle this in the udev hwdb and the new tool introduce a few commits ago can help finding the palm detection threshold. Unlike the other palm detection features, once a palm goes past the threshold it remains a palm until the touch is released. This means palm overrides any other palm detection features. For code simplicity, we don't combine the states but merely check for pressure before and after the other palm detection functions. If the pressure triggers, it will trigger before anything else. And if something else is already active (e.g. edge where the pressure doesn't work well) it will trigger as soon as the palm is released. The palm threshold should thus be chosen with some room to spare between the highest finger pressure. https://bugs.freedesktop.org/show_bug.cgi?id=94236 Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> |
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| .. | ||
| .gitignore | ||
| 80-libinput-device-groups.rules.in | ||
| 80-libinput-test-device.rules | ||
| 90-libinput-model-quirks.hwdb | ||
| 90-libinput-model-quirks.rules.in | ||
| libinput-device-group.c | ||
| libinput-model-quirks.c | ||
| Makefile.am | ||
| parse_hwdb.py | ||