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I'm running 18.04 LTS and just did an automatic maintenance upgrade. The kernel versions are 5.4.0-91-generic (previous) and 5.4.0-92-generic (current)

After today's upgrade, the mouse and keyboard are not recognized. If I use Grub to boot to ...91 all is well. Keyboard works fine in Grub. On ...92 I get the login screen but cannot log in without mouse or keyboard

I've tried booting to a shell with /bin/bash in the Grub line. This does nothing. I can boot to run level 3 using Grub but the keyboard is still not recognized so I can't enter commands

FWIW, I'm using a KVM switch, America Megatrends micro PC, and generic usb keyboard and wireless mouse

This same thing happened when I did a dist-upgraded to 20.04 LTS so I had to back it out

Any help would be most appreciated. I'm stuck

access123
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  • Can you try without the KVM switch? Or with a different keyboard? Can you access the machine over SSH? – cocomac Jan 04 '22 at 22:33
  • Thanks so much for your reply. I've removed the KVM switch and no difference. The machine is otherwise functioning properly as I can ping and ssh to the machine. – access123 Jan 05 '22 at 05:47
  • Can you ssh to it and check /var/log/apt/history.log to see if something was uninstalled? A bit of a long shot, but it happened to me once that xserver-xorg-input-all was removed when installing a package, resulting in no keyboard or mouse input to the x server. – frippe Jan 05 '22 at 06:46
  • I've checked my apt history, starting with the upgrade that started the problems, which incidentally was the start of the log. There is an entry where I tried re-installing xserver but this was long after the problem started. Nothing has been removed. Sadly, there's not room to paste the log in the comment – access123 Jan 06 '22 at 03:43

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