Created attachment 1249496 [details]
evemu recording of events on the touchpad that have no effect on the desktop
Description of problem:
After an update, no input on the Synaptics TouchPad results in cursor moving or button actions, when logged into the user session on Wayland or XOrg with libinput driver. At the same time, the TrackPoint device and its buttons (above the touchpad) work normally.
In GDM, input from the touchpad works as expected. Same in a user session on XOrg with the evdev driver.
Version-Release number of selected component (if applicable):
Always when desktop input is handled by libinput.
Observed on the ThinkPad T500.
"In GDM, input from the touchpad works as expected."
that means that libinput works, and replaying the recording here shows that it does work at the libinput level. What's your most recent Xorg.log? could be an xorg-related misconfiguration
Created attachment 1250144 [details]
Xorg log with libinput as the sole applicable driver
Not sure if it helps, but it's xorg-x11-drv-synaptics installed without xorg-x11-drv-libinput that provides smooth relative input from the touchpad.
With evdev alone, the cursor seems to jump to the absolute position in relation to the touchpad size.
very weird. the log doesn't complain about anything. You don't happen to have the touchpad disabled in the control-center?
run xinput test-xi2 and move the pointer, does that see any RawEvents from the device?
(In reply to Peter Hutterer from comment #4)
> very weird. the log doesn't complain about anything. You don't happen to
> have the touchpad disabled in the control-center?
As a matter of fact I did, but I have no idea how it got disabled.
It just used to work in Fedora 25 until an update, and then it didn't.
I wasn't following the sequence of events closely, though; as far as I remember, it might have happened just over the laptop being suspended and then resumed. I'll tell more if the problem reoccurs.
fwiw, the matching gsettings key here is
gsettings get org.gnome.desktop.peripherals.touchpad send-events
if that's not on 'enabled' then the touchpad is disabled. I wonder if some gnome-related update somehow triggered that.
still, if I understand this correctly it's working now, right? until we figure out what toggled that setting, I'm closing this bug.