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.
3 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?
.
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Welcome to AskUbuntu. While your answer is basically correct when talking about laptops, it doesn't answer the question because: the OP said they have a desktop PC and I highly doubt that it has such configuration in its firmware (since there is no built-in keyboard). The OP also stated that they tried pressing the keys in conjunction with the Fn key, but it didn't make a difference.– danzelJan 31, 2019 at 10:08
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On Desktops the keys are wired as well with or without the
fn
keys. I didn't see the OPs comment regarding using thefn
key as well...– ZubdaJan 31, 2019 at 17:05
If it connects via a USB cable or similar, unplug the device and then plug it in again and see if it works.
Ref: https://help.ubuntu.com/stable/ubuntu-help/power-suspendfail.html.en
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.
I'm using Ubuntu 20.04 with a wired keyboard, and encountered the same question.
In my keyboard, hotkeys Fn
+F10
~F12
control video playing. But if there is no video captured, when I press Fn
+F10
(any of F10~F12
), the NO
window pops up as the attached image in the OP.
There is also a hotkey Fn
+Esc
to enable / disable Hotkey mode. If we enable Hotkey mode, F10
acts like Fn
+F10
. Therefore, we may get NO
window in this mode by pressing the single key F10
, F11
or F12
.
I guess you are in Hotkey mode. Press Fn
+Esc
to exit the mode.
sudo evtest
, select your keyboard and press F12. Does anEV_KEY
event show up? If yes, which key (theKEY_...
value in parentheses)?