Created attachment 110718 [details] dmesg information after step 3 ==System Environment== -------------------------- Regression: No. First test on this machine. Non-working platforms: BSW Working platforms: ==kernel== -------------------------- -nightly: a243fbbcfd348ec042b100f3ce02f215252d177d(fails) -queued: 5cb7179b428cf00dd96e74ed4f37efb19ba05e14(test fails in the same way) Detail of the commit -fixes: sha1 (test fails in the same way) Detail of the commit ==Bug detailed description== ----------------------------- Boot BSW with DP connected, when login appears on DP display, the eDP screen does not show anything. If I boot BSW without DP connected, I can see login on DP display. But if I connect DP screen with BSW, only DP screen shows login and eDP screen is blank again. ==Reproduce steps== ---------------------------- 1. Connect DP display to BSW and boot BSW 2. When login appears on DP display, the eDP screen does not show anything 3. Running xinit shows xterm on DP display, but eDP screen still does not show anything.
The second section of "Bug detailed description" should be: If I boot BSW without DP connected, I can see login on eDP display. But if I connect DP screen with BSW, only DP screen shows login and eDP screen is blank again.
The BIOS version is 0.49
I tried 10-17 nightly kernel that was tested fine before, but I saw both DP and eDP screen are blank. So it seems that this issue might be related with BIOS version. I tried to downgrade the BIOS from 0.49 to 0.40, and found that both DP and eDP screen shows text for 10-17 nightly kernel. I tried other kernel and below is the result: BIOS 10-17 nightly 3.18.0 drm-intel-testing 12-06 0.49 both blank both blank eDP shows text, DP blank 0.40 Both show text both show text DP shows text, eDP blank I then run "testdisplay -a" for 3.18.0 + 0.40 BIOS, but DP screen is blank with two level 3 errors (many entried for each error): <3>[ 187.580558] [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up <3>[ 187.580932] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting Is it a BIOS issue?
CORRECTION: THE RESULT FOR drm-intel-testing 12-06 IN COMMENT #3 SHOULD BE INVERSE: BIOS drm-intel-testing 12-06 0.49 DP shows text, eDP blank 0.40 eDP shows text, DP blank
testdisplay/xrandr shows eDP is connected with drm-intel-testing 12-06 + BIOS 0.49, but eDP is blank: eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 280mm x 160mm 1920x1080 60.00*+ DP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 600mm x 340mm 1920x1080 60.00*
DP screen is blank or flashing when running "testdisplay -a/d"
Tried with BIOS version 0.51.3 and still saw this issue. With the new BIOS, DP screen will be black for ~2 seconds, and show text for inconsistent time (1 second ~ 1 minute).
having the same issue on Dell Latitude E7440 Dell Laptop Notebook E/Port Replicator Docking Station PR03X I just upgraded from 3.14 to 3.18.2 in 3.14 I had to use the docks DisplayPort and the dells HDMI and it worked (72795). with 3.18 if I start X in the dock, both DP and eDP one are not available, HDMI from notebook would work. When I start outside the dock and then plug into it, eDP still works, DP is not available. With not available I mean that xrandr shows disconnected. There was nothing in dmesg or xorg but I can reproduce the issue, if somebody wants specific information I can test it
upgraded from dell bios A06 to A12 no change
Try video.use_native_backlight=0 module parameter.
Created attachment 112265 [details] dmesg with video.use_native_backlight=0 Boot system with kernel module parameter video.use_native_backlight=0, eDP screen is still black. Attached is the dmesg with the module parameter video.use_native_backlight=0
(In reply to Jeff Zheng from comment #11) > Created attachment 112265 [details] > dmesg with video.use_native_backlight=0 > > Boot system with kernel module parameter video.use_native_backlight=0, eDP > screen is still black. Attached is the dmesg with the module parameter > video.use_native_backlight=0 mikopp, please share your result too. I suspect you have a different bug.
mikopp, please file a separate bug. I believe they are different.
The issue disappears when disabling dynamic memory self refresh in the BIOS
Will do, just need time to reproduce it again.
(In reply to Jeff Zheng from comment #14) > The issue disappears when disabling dynamic memory self refresh in the BIOS Based on this I assume dupe. *** This bug has been marked as a duplicate of bug 87666 ***
I filed a seperate bug for my case (bug 88918). This still happens with 3.18.5
*** Bug 89117 has been marked as a duplicate of this bug. ***
Verified on following ocnfiguration: Kernel: 4.0.0-rc3_drm-intel-nightly_a2f9de_20150313 BIOS: V59 DP monitor: ASUS PA238Q HDMI monitor: ASUS VS239HR Both 'dynamic memory self refresh' and 'DDR DVFS' are enabled.
Closing old verified.
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