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I'm trying to configure xmonad to change my brightness when I press the brightness increase/decrease buttons on my laptop's keyboard. This is my xmonad.hs
, with some irrelevant parts snipped:
main = do
xmproc <- spawnPipe "/usr/bin/xmobar /home/zac/.xmobarrc"
xmonad $ def
{ ...
} `additionalKeys`
[ ....
, ((0, 0x1008FF03), spawn "sudo nudge /sys/class/backlight/intel_backlight/brightness -5")
, ((0, 0x1008FF02), spawn "sudo nudge /sys/class/backlight/intel_backlight/brightness +5")
]
I've written a program called nudge
that "nudges" the value of a file by a given amount. The exact command works, when I run it manually from the terminal, and I've confirmed that the keys are the correct ones by spawning a different process when they are pressed. So, I've come to the conclusion that the problem is that xmonad isn't allowed to run sudo
.
Presumably, though, it is possible to run sudo from xmonad, otherwise a lot of things wouldn't be doable. So, how do I do this?
(P.S. Perhaps there is an easier way to change the brightness on Linux - if that is the case, I'd like to know, out of interest, but I'd rather do it this way (writing a program) anyway.)
There is probably some errors in your xmond log. – Chris Stryczynski – 2020-01-05T13:47:12.073