I still have this very* annoying problem with the HDMI output on this laptop. Mainly when I leave the laptop alone for a while the screen goes out and it doesn't come back to life. Sometimes changing to console mode and then back to the X screen solves the problem. Sometimes it doesn't. It is very stochastic. Sometimes going back and forth from HDMI to LVDS as follows fixes the problem:
When the HDMI problem arises occasionally I also fail to get anything on the laptop screen as well. It is like the graphic card is forgetting to send the output at all and in that case only rebooting brings it back to functioning properly. Does anybody else experience the same problem? I like to use the laptop attached to a big screen, but this issue can become very annoying. I don't see any interesting messages in dmesg. Any clue how to debug this?
xrandr --output LVDS1 --auto --output HDMI1 --off
xrandr --output LVDS1 --off --output HDMI1 --auto