Created attachment 115045 [details] dmesg log ==System Environment== -------------------------- DP monitor: ASUS PA238Q BIOS: V59 Regression: No. Tried on drm-intel-testing-2015_01_30 and still saw this issue. This is weird since I saw PA238Q DP screen worked before. This machine was reworked and the DP screen is black too when I tried to enter into BIOS setting. Non-working platforms: BSW ==kernel== -------------------------- -testing: drm-intel-testing-2015-03-27 (fails) ==Bug detailed description== ----------------------------- When connected to ASUS PA238Q with DP cable and booted system, DP screen is black. If I connected to Dell U2311Hb, DP screen works. ==Reproduce steps== ---------------------------- 1. Disconnect eDP, Connect ASUS PA238Q with DP cable and boot
Am I understanding you correctly that the display doesn't work from BIOS either? If that's the case then this is (most likely) NOT a DRI/DRM related bug, since the BIOS doesn't use the DRI/DRM drivers. If something worked before the machine rework, but doesn't work now, it's almost certain that the rework caused this issue...
This issue disappears with drm-intel-testing-2015-04-23, it looks to be wrong state of monitor. Close it.
This time when I connect SkyWorth (TV) 50E780U with HDMI and the screen is blank. BDW/SKL are fine. I tested on drm-intel-testing-2015-05-08 with V69 BIOS
Close it since it's not driver bug.
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