I updated my Ubuntu Linux to 14.04 and now the mouse and keyboard don't work in the login screen. I tried re-installing grub from a Live USB, but it's still not working. I would really appreciate your help.
Reinstall input device drivers
sudo apt-get install --reinstall xserver-xorg-input-all
half-way fix: reboot, choose in boot menu older kernel, boot it. keyboard and mouse works. then you can login and fix your configs. ps: if you can not boot anymore (cause you kill your grub) then only one way to fix: you must make boot usb flash drive and boot from it. then mopunt your HDD and backup/fix your configs.
Boot into recovery mode, hold shift after the BIOS loads.
Select the second kernel with (recovery mode). If you still have the same problem, mouse/keyboard not responding then reboot and try again with the next available recovery mode kernal. I have once had to use the third option before it worked.
Turn on networking
network then fix the packages
dpkg. Once complete
The video drivers may be wonky, either way reboot.
Keyboard and mouse should be working again.
protected by Community♦ Apr 10 '15 at 13:51
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