How to prevent system from suspend when camera is on? I tried to use Caffeine which works great for all the apps which I know the process name. However, when I’m on the meeting via Firefox/chromium sometimes after 20 minutes my computer suspends. I use lightdm with Awesomewm.
Hello @lukastymo and welcome 
Do you mean it goes into deep sleep mode (S3) after 20min? Never heard, it would even do this by default… But I believe you mean the screen suspend time, then I have an idea for you:
I was also annoyed by this default 20min standby behavior when using suckless dwm, so i just created a file and increased it here:
file: /etc/X11/xorg.conf.d/99-default.conf
Section "ServerFlags"
Option "BlankTime" "15"
Option "StandbyTime" "30"
Option "SuspendTime" "45"
Option "OffTime" "60"
EndSection
The numbers are minutes.
If you need it really only for the camera, then use a udev rule.
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