Ubuntu – Ubuntu 20.04 – keyboard not working


I just upgraded my laptop from 18.04.5 to 20.04 and my keyboard and mouse have stopped working.
The keyboard works in BIOS and when entering my password for cryptsetup but as soon as it's all fully loaded up, the mouse and keyboard stop working.
I've tried using the terminal/command line to enter sudo alt-get install xserver-xorg-input-all as suggested on a few sites. This has not helped at all!
Does anyone have any suggestions? I'm completely lost without my laptop!!
Thanks in advance.

Best Answer

Right! Have found a workaround. Have access to GNU GRUB menu as i have dual boot with windows. From There if i select 'advanced options' instead of the default and boot from Linux 5.4.0-42-generic i have access to all keyboard and trackpad features.

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