I have a very similar problem with the touchscreen not working (most of the time) on my DELL Latitude 7400 2-in-1, except that when it does not work, it does not even work on the login screen. Closing the lid or restarting does not help. Then, from time to time, the screen works again...
My touchpad is also recognised as both mouse and touchpad, but that does not prevent it from working properly. The problem is solely with the touchscreen, which is simply unreactive (most of the time) although it does properly appear in xinput: Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ DELL08AF:00 044E:1225 Mouse id=13 [slave pointer (2)] ⎜ ↳ DELL08AF:00 044E:1225 Touchpad id=14 [slave pointer (2)] ⎜ ↳ PS/2 Generic Mouse id=20 [slave pointer (2)] ⎜ ↳ Wacom HID 48CA Finger touch id=12 [slave pointer (2)] ⎜ ↳ Wacom HID 48CA Pen stylus id=11 [slave pointer (2)] ⎜ ↳ Wacom HID 48CA Pen eraser id=21 [slave pointer (2)] -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-input-synaptics in Ubuntu. https://bugs.launchpad.net/bugs/1876991 Title: Touchpad started appearing both as a touchpad and as a mouse input devices after upgrade to 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/1876991/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
