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Running 20.04 with all the repos enabled (including focal-proposed)
A recent update (apt-get dist-upgrade) made the mouse point disappear.
The mouse worked on a text console... and lsusb etc showed the presence of the
mouse.
In Wayland, pressing control key showed the pointer location.
Resolution
Edited /etc/gdm3/custom.conf and uncommented "WaylandEnable=false"
Rebooted a mouse pointer is now back.
Wayland device driver problem?
** Affects: mutter (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: bot-comment focal gdm ubuntu wayland
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Mouse pointer vanished on Wayland (okay on X)
https://bugs.launchpad.net/bugs/1866217
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