sometimes my PC doesn't detect the display connected on HDMI. Other display, VGA, is always detected and functional. I'm using integraded graphics card (Intel i5-4460 CPU), no separate graphics card.
So, sometimes HDMI works as it should, but sometimes it's not recognized.
user@Home-PC:~$ xrandr HDMI-1 disconnected (normal left inverted right x axis y axis) 1920x1080 60.00 user@Home-PC:~$ xrandr --output HDMI-1 --right-of VGA-1 user@Home-PC:~$ xrandr --output HDMI-1 --mode "1920x1080" xrandr: Configure crtc 1 failed I tried arandrbut that only shows VGA display, and HDMI is greyed out.
Any idea how to solve this?
1 Answer
First, use xrandr --verbose to figure out what you're dealing with.
No guarantees but specifying the crtc number may resolve things -- especially if you're using multiple external monitors.
If one crtc number doesn't work try another. For example, a situation with laptop video at crtc 0 and xrandr --verbose output indicating 0 1 2 are options for DP-1 (an external monitor connected via VGA), crtc 1 failed.
$ xrandr --output DP-1 --crtc 1 --mode 1920x1080 --pos 1366x0 --rotate normal /usr/bin/xrandr: Configure crtc 1 failed Trying again with 2 solved the problem:
$ xrandr --output DP-1 --crtc 2 --mode 1920x1080 --pos 1366x0 --rotate normal 
