[Bug 40699] KMS on Thinkpad W500: no picture on external monitors with DisplayPort, but DVI works.

https://bugs.freedesktop.org/show_bug.cgi?id=40699

--- Comment #6 from Maciej Pawlik maciej.pawlik.xml@gmail.com --- I've done some testing, and vanilla kernel works only with 720x400. With ATOM_DP_SS_ID2, as you suggested, some modes work, some don't: DisplayPort-0 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 518mm x 324mm 1920x1200 60.0 + <-ok 1920x1080 60.0 <-ok 1600x1200 60.0 <-ok 1680x1050 60.0* <-ok 1280x1024 60.0 <-can't sync 1280x960 60.0 <-can't sync 1024x768 60.0 <-ok 800x600 60.3 <-can't sync 640x480 60.0 <-can't sync 720x400 70.1 <-ok

It's the same with my crude fix.