I have a W540 that also freezes when trying to use DP, with the
difference that I don't see any oops or error message in neither the
kernel logs, nor the X logs. When I plug in an external monitor, xranrd
shows it as connected to DP2, regardless of whether it's connected to
DP1, DP2, DVI or HDMI. O
Created attachment 94007
dmesg with patch applied, old firmware
I applied the patch on the FC20 3.12 kernel and although there was no
freeze, I got some scary error messages in my kernel logs. See attached
output. This is a Lenovo W540 laptop running Fedora 20 with the latest
laptop BIOS, but the
