Bug description: When plugging in a displayport monitor it is not detected on this Thinkpad P50. It is an nvidia/intel hybrid, and displayport works fine when the nvidia gpu is enabled, but not when it is running in IGP mode with the nvidia disabled. This same problem exists in 4.2 and drm-intel-nightly 20151016, and is the same if hotplugging or booting when it already plugged in. System environment: -- system architecture: 64 bit -- kernel versions: drm-intel-nightly 20151016, 4.2.0 -- xf86-video-intel: 2:2.99.917-1~exp1ubuntu2.2~trusty1 -- Linux distribution: ubuntu 14.04.3 -- CPU: Intel(R) Xeon(R) CPU E3-1505M v5 @ 2.80GHz -- GPU: Intel Corporation Device [8086:191b] (rev 06) (prog-if 00 [VGA controller]) + NVIDIA Corporation Device [10de:13b0] (rev a2) (prog-if 00 [VGA controller]) -- Display connector: eDP, DP. -- Monitor: Dell E1715S
Created attachment 119229 [details] dmesg - drm-intel-nightly
Created attachment 119230 [details] dmesg - 4.2.2 drm (backported)
Created attachment 119231 [details] Xorg.0.log
It looks like the external connectors aren't connected to the integrated graphics, at all. I presume xrandr won't list them either. Sorry, closing. If you find any evidence to the contrary (like Windows working okay with this) please reopen. You might have better luck through the Thunderbolt connector on the thing; I'm not giving any guarantees though. Side note, you are missing DMC firmware: [ 2.375361] i915 0000:00:02.0: Direct firmware load for i915/skl_dmc_ver1.bin failed with error -2 [ 2.375410] [drm:i915_firmware_load_error_print [i915]] *ERROR* failed to load firmware i915/skl_dmc_ver1.bin (0) available in linux-firmware and https://01.org/linuxgraphics/downloads
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.