03-14-2014 03:06 PM
I have an X220 with an i72620 running win 7 64. curious behavior today. when I connect the laptop to a wqhd monitor (2560x1440) via a display port to display port cable and turn off the laptop screen so as to run only the monitor things work great. No issues. However I tried a connection via dispaly port to hdmi and while i could get the monitor to work running the native resolution of the X220 screen (around 1366x768), every time I tried to select external monitor only, the machine would blue screen and crash. Any ideas why????????
I did one experiment hooking the display port to hdmi to another monitor--this one 1920x1080--and that did work.
I guess I can't figure out why the display port to display port works fine with the wqhd monitor but not when a display port to hdmi is used.
03-16-2014 05:04 PM
03-16-2014 05:09 PM
The monitor is an ASUS 27" monitor with a native resolution of 2560x1440. That is the one that causes the problems if I connect via the display port to hdmi. If I connect display port to display port it works fine. If I connect the x220 using the display port to hdmi to my other monitor an HP 2338 with a native resolution of 1920x1080 there are no problems. Currently I have connected the ASUS monitor to my w530 via its mini display port to the display port on the monitor and it works great.
03-16-2014 06:26 PM