Author :
Sam Lantinga
Date :
2017-02-11 11:14:48
Hash :cf31ea14 Message :Fixed bug 3583 - X11 touch device can be permanently lost
Volumetric
In X11 the SDL error "Unknown touch device" can occur after which the application stops recognizing touch events. For a kiosk-type application this results in a hang as far as the user is concerned. This is reproducible on HP Z220/Z230/Z240 workstations by swapping USB cables for a while and it also occurs with no physical changes, probably due to USB device power management. A workaround is to make SDL re-enumerate the touch devices like it does at startup. A patch is attached.
Sam Lantinga