touchpad stopped working after kernel update

Asked by Jiri Kosinka on 2018-10-01

Relevant stuff:

Operating System: Ubuntu 18.04.1 LTS
Kernel: Linux 4.15.0-34-generic
Architecture: x86-64

$ xinput -list

⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Logitech Optical USB Mouse id=9 [slave pointer (2)]
⎜ ↳ AlpsPS/2 ALPS GlidePoint id=12 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
    ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
    ↳ Power Button id=6 [slave keyboard (3)]
    ↳ Video Bus id=7 [slave keyboard (3)]
    ↳ Sleep Button id=8 [slave keyboard (3)]
    ↳ HP HD Camera: HP HD Camera id=10 [slave keyboard (3)]
    ↳ AT Raw Set 2 keyboard id=11 [slave keyboard (3)]
    ↳ HP Wireless hotkeys id=13 [slave keyboard (3)]
    ↳ HP WMI hotkeys id=14 [slave keyboard (3)]

but

$ xinput test 12

produces nothing.

Currently, i have only one file in /usr/share/X11/xorg.conf.d with

# Match on all types of devices but joysticks
Section "InputClass"
        Identifier "libinput pointer catchall"
        MatchIsPointer "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput keyboard catchall"
        MatchIsKeyboard "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput touchpad catchall"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput touchscreen catchall"
        MatchIsTouchscreen "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput tablet catchall"
        MatchIsTablet "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

And I also tried with synaptics, but that did not work either. Keyboard and mouse work normally.

Thank you.

Question information

Language:
English Edit question
Status:
Solved
For:
Ubuntu Edit question
Assignee:
No assignee Edit question
Solved by:
Jiri Kosinka
Solved:
2018-10-01
Last query:
2018-10-01
Last reply:
Jiri Kosinka (jiri-kosinka) said : #1

I'm not sure why, but the touchpad works now. I did not change any settings. Rebooting multiple times did not help either. But then I booted into an older kernel version, and not even the keyboard worked. After that, I booted into the most recent kernel, and all works. Again, no clue why...