Public bug reported: Binary package hint: xserver-xorg-input-evdev
Also reported upstream: https://bugs.freedesktop.org/show_bug.cgi?id=19819 Problem located in evdev.c / EvdevCacheCompare() Symptom: USB touchscreen no longer works when switching from X to another virtual console and then back to X. Sample log message: (EE) Elo TouchSystems, Inc. Elo TouchSystems 2700 IntelliTouch(r) USB Touchmonitor Interface: Device has changed - disabling. (WW) Elo TouchSystems, Inc. Elo TouchSystems 2700 IntelliTouch(r) USB Touchmonitor Interface: Release failed (Invalid argument) Cause: EvdevCacheCompare fails because it also compares all values of input_absinfo structure, which include the last tapped position of the touchscreen (.value field). This is never updated in the cache, and anyway it could change anytime if the screen is touched while away from the X virtual console. Solution: Exclude .value from comparison. One-liner patch attached. ** Affects: xserver-xorg-input-evdev (Ubuntu) Importance: Undecided Status: New -- USB touchscreen is disabled when switching virtual console back to X https://bugs.launchpad.net/bugs/322946 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs