Displayport Resolution Issues

Hardware Hub Other Hardware
1

Greetings all,

I recently acquired my first monitor have been experiencing some weird resolution issues when using my Displayport cable for connection between the monitor and computer.

My PC is an ASUS ROG G20CB and my monitor is a BENQ XL2430T, 144hz monitor.

So here is the quick and skinny, I have the monitor listed above attached via Displayport cable to my PC and I have my TV attached via HDMI to my PC as well. Both devices are 1080p resolution so naturally I run them as such. I have them set to duplicate so I can run my games to the monitor as well as the TV for playing in the living room with controller or watching movies/videos, etc. The issue arises when I shut down the system and then start it up again. The monitor changes to 800x600p resolution at 60hz and I am unable to bring it all the way back up to 1920x1080p resolution (the highest it will go is 1600x1024p). Regardless of how I set up the TV and monitor (meaning if it is duplicating, extending, show only 1 or 2) I can't correct it back to 1080p.

I am currently using my Dual Link DVI cable instead of the Displayport and I have no issues with it adjusting the resolution upon shutdown or restart.

Has anyone seen this before or know how to correct it?

2
  1. reinstall videocard driver
  2. look which monitor is identified first if it's the TV and it's off then in some rare cases Windows fubars it.
  3. maybe a really crappy displayport cable.
3

Had a similar issue today. GPU driver is up-to-date.
In my case the miniDP-to-DP cable seems to be broken, since the HDMI-to-HDMI cable works fine. Ordered two cables today, should arrive tomorrow.