My touchpad has mysteriously stopped working after I upgraded my kernel, despite having now downgraded my kernel and even tried to restore a previous snapshot using Timeshift.
I have one of the new Purism Librem 13 laptops.
I upgraded the kernel because I realised that bluetooth didn't seem to be working (the whole panel was greyed out when selected in System Settings). I had previously upgraded my kernel to 4.1.20 because the touchpad was only detected as a mouse on 3.19 and ignored all settings (enabling/disabling "Tap to click" etc.)
So in an effort to fix the bluetooth I tried a few kernel upgrades (going as high as 4.5). At some point the touchpad just totally stopped responding. So I tried downgrading and even restoring a Timeshift snapshot but nothing seems to fix it. Also bizarrely, the System Settings seem to be out of sync with the kernel. Previously on 4.1.20, the option for "Two finger scroll" was greyed out, but now it remains selectable right down to 3.19 (not that it does anything).
I've tried the suggestions on a number of sites. If I type
xinput list I get this, so the touchpad is apparently recognised (I'm also currently using an old USB mouse):
Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ ImPS/2 BYD TouchPad id=13 [slave pointer (2)] ⎜ ↳ Logitech USB-PS/2 Optical Mouse id=10 [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)] ↳ Power Button id=8 [slave keyboard (3)] ↳ Sleep Button id=9 [slave keyboard (3)] ↳ USB 2.0 Camera id=11 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=12 [slave keyboard (3)]
Someone has also created a very handy dkms package for Purism's driver for this touchpad. With or without that installed, the touchpad was working fine before my kernel fiddling. :(
I have tried a number of other suggestions like:
sudo modprobe -r psmouse sudo modprobe psmouse
I would really appreciate any ideas anyone has here.
Incidentally, as a new convert to Linux and Elementary OS, I just want to say I love this distro!