I played Skyrim via Wine, then it started lagging so hard that I rebooted computer holding Power button. Then, when I turned it on, on a login page keyboard and mouse were working. I typed password, and after logging in noticed that keyboard and mouse are not working. I tried to reboot (same situation), tried recovery mode. Nothing worked. What I need to do? Ubuntu 18.04
2 Answers
If you can type on the login screen, then there should be a way to workable shell.
This article has more on it.
From the description of the error, I would doublecheck for hardware problems, like e.g. a dying SSD. I would look for I/O errors in system logs.
If there are indeed signs of significant disk problems, then, before anything else, I would backup all important documents/files/etc from the disk, while being booted from a live USB.
After important files are backed up, I would also consider a filesystem check and possibly repair with fsck
(on the unmounted /
partition), again, from a live USB.
Then, regarding the keyboard / mouse:
Recently I have seen a few places that recommended
sudo apt-get install xserver-xorg-input-all
or
sudo apt-get install --reinstall xserver-xorg-input-all
read these: Keyboard and mouse unresponsive after suspend,
and the aforementioned article.
I have no personal experience with this procedure, just offering for consideration.
Finally, regarding "rebooted computer holding Power button", I recommend googling and learning how to reboot with the "REISUB" method. It's not always effective, but when it is, it's nicer on the (file)system.

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Thanks for the answer, but how should I enter the commands if my keyboard and mouse are dead? – Mouvre Dec 24 '20 at 10:14
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Re-read the first two lines of my answer. Your inputs seem to not work after the graphical interface loaded; but before they do. Therefore, you should be able to navigate to a command line interface (not the graphical), where you can issue commands. This has more detailed info: https://askubuntu.com/a/859640/1157519 – Levente Dec 24 '20 at 10:32
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1Also this: https://wiki.ubuntu.com/RecoveryMode | Get to grub menu > pick advanced options for Ubuntu > pick recovery mode > pick 'drop to root shell' > follow the instructions, if any. – Levente Dec 24 '20 at 10:44
To complete the answer provided by Levente, the following commands may come in handy:
1. Enable a disabled input device
- Get the ids of the devices:
xinput --list
- Enable the device with id=n:
xinput enable n
2. Remove/add modules to Linux kernel
- Remove touchpad driver:
modprobe -r psmouse
- Add it again:
modprobe psmouse
- For keyboard, I think you must use atkbd instead of psmouse
NOTE that you need to run the commands as super user, I mean, sudo.

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