Bug ID: 405474
Summary: Loss of all touchpad functionality if mouse
disconnected during suspend
Platform: Ubuntu Packages
Target Milestone: ---
I enabled 'Disable touchpad when mouse disconnected'. I suspended the laptop
and removed the mouse. When I turned it back on again, I lost all pointer
functionality. I rebooted the laptop and discovered touchpad options were
missing from system settings. This issue persisted between reboots and made
the laptop virtually useless.
Functionality restored only when mouse was connected and disconnected while
unit was booted. Having the mouse plugged in during boot did not fix the
problem, although I at least had a usable mouse cursor.
STEPS TO REPRODUCE
1. Connect mouse
2. Enable 'Disable Touchpad when mouse connected'
3. Suspend Laptop
4. Disconnect mouse
5. Resume Laptop
6. Reboot laptop
Total loss of touchpad functionality. Hardware was non-responsive. Touchpad
settings were missing from Input Devices
Touchpad works on resume, no loss of settings
Linux/KDE Plasma: Kubuntu 18.10
(available in About System)
KDE Plasma Version: 5.13.5
KDE Frameworks Version: 5.50
Qt Version: 5.11.1
Enabling feature while mouse disconnected causes touchpad to become immediately
unavailable, but the touchpad settings only disappear if the machine is
rebooted. Plugging in a USB mouse restores the touchpad settings.
This was extremely inconvenient and cost me a morning of productivity because
my laptop was useless while I was travelling. I can't even fathom how someone
could think arbitrarily removing the touchpad settings would be a good idea.
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