Blank DELL on DisplayPort

Posted by m6w6 on 19th August 2015 in Mike's sudden inspirations: WTF, SYS

I’ve been struggling since ever with my DELL U3014 on the DisplayPort saying there’s no signal after a power cycle of the monitor.

I just found a solution to bring the monitor back to life without rebooting the box; just ssh into and issue:

$ DISPLAY=:0 xset dpms force off  
$ DISPLAY=:0 xset dpms force on  

I’m running Gnome3 on Arch Linux, so YMMV.