I am sorry that I forgot the files from dmesg and Xorg.0.log. And right
after sending this bug report I read some articles in AskUbuntu. I
installed Ubuntu by UEFI mode when the bug happened, and I found no use
of UEFI for me. Then I reinstalled by Legacy mode and meantime I erased
everything when
Public bug reported:
Mouse vendor: Elecom
Mouse name: Deft M-DT20R
S/N 99011158
S/N 9700261B
I have two sets of this model and both are not working any more.
Wireless USB mouse stopped working after 'sudo apt upgrade' on 0:00 UTC 28th
May 2020.
I also upgraded BIOS of ThinkStation P500 from A4KT8