Score:0

Fn key does not work on Ubuntu 22.04.1

sa flag

Recently I updated my kernel to 5.15.0-50-generic. After that my Fn key stopped working. Fn lock doesn't work either. So all special keys were lost however Home (Fn+LeftArrow) and End (Fn+RightArrow) were still working.

Then after some time I updated my NVidia drivers using apt after which Home and End stopped working too and fn mode changed to the opposite: now f1-f12 were locked while sound, brightness and other keys were working.

After that update Windows, which is installed in dual boot, lost his control over Fn key too so I suppose the problem is in the BIOS settings. However I don't have an fn toggle mode setting so I can't change fn keys behavior from there. I even tried to press functional keys in Ubuntu launched from USB drive but nothing changed there.

How can I fix it? Or at least how can I change fn mode now?

ChanganAuto avatar
us flag
When the problem occurs in different OSes it's about neither. So why ask here? Yes, it can be a simply problem of firmware (UEFI) settings but it's unlikely, hardware failure is way more likely.
Deep Darkness avatar
sa flag
ChanganAuto, I thought it could be a hardware failure too but it's quite suspicious that it appeared immediately after the update which seems more like a bad software configuration.
ChanganAuto avatar
us flag
According to you the problem got worse but preceded any new software. And, again, if it happens in Windows as well it's not an Ubuntu nor Windows problem.
Deep Darkness avatar
sa flag
Yes, I agree. Thank you for your answer! :)
Will avatar
id flag
I presume it's a laptop? Try an external keyboard? At least you'll know if it's a hardware issue then.
Deep Darkness avatar
sa flag
The problem was resolved: it was a hardware problem. Not even in BIOS but in the laptop keyboard itself. Sorry and thank everyone for help.
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