I was just doing coding and needed to see the source code of my web-page, as I pressed F12 key, It didn't work and shown me the now allowed sign as given in below image. Then I tried other keys, I found that F10 and F11 is also not working. The keys are not working anywhere in the system.
2 Answers
The F keys have two functions each, one is the shortcuts we know and use, and one is the built in with the manufacturer, in the BIOS there is a setting to which of the 2 is the default, i.e. which one will execute when you press one of the F keys, and the other use is accessed via pressing fn+F?.
If it connects via a USB cable or similar, unplug the device and then plug it in again and see if it works.
Ref:
This works for me in Ubuntu 18.04.6 LTS. Usually, after the system suspends, I see this issue along with a few other issues with Wifi, sound etc. Once the system is restarted all works fine.
