Bug 88918 - DP not working when Dell is in dock
Summary: DP not working when Dell is in dock
Status: CLOSED WORKSFORME
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium blocker
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-02-02 09:11 UTC by mikopp
Modified: 2017-07-24 22:48 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:


Attachments
dmesg.log from kernel 3.18.5 (23.43 KB, text/plain)
2015-02-02 09:11 UTC, mikopp
no flags Details
xorg.log from kernel 3.18.5 (29.67 KB, text/plain)
2015-02-02 09:11 UTC, mikopp
no flags Details
dmesg from kernel 3.14 (26.10 KB, text/plain)
2015-02-02 09:12 UTC, mikopp
no flags Details

Description mikopp 2015-02-02 09:11:33 UTC
Created attachment 113043 [details]
dmesg.log from kernel 3.18.5

I am currently running on kernel 3.14 Dell Latitude E7440 ( Intel Corporation Haswell-ULT Integrated Graphics Controller)

With 3.14 I cannot connect my two external screens (DP and HDMI) on the doc, because then they get merged as one display. So I connect the HDMI to the notebook directly. This is supposed to be fixed in 3.18. 84718 and others I think it had to do with MST and in 3.14 I also saw errors that DP couldn't be train
* [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting

In 3.18 however when I start in the doc all screens are black.
When I start outside the dock the eDP works but putting it into the doc nothing comes up on DP (dock) while connecting something to HDMI on the notebook itself still works.  With not available I mean that xrandr shows disconnected.
I originally thought this to be 87223 but was told to report a separate bug.
Comment 1 mikopp 2015-02-02 09:11:56 UTC
Created attachment 113044 [details]
xorg.log from kernel 3.18.5
Comment 2 mikopp 2015-02-02 09:12:25 UTC
Created attachment 113045 [details]
dmesg from kernel 3.14
Comment 3 mikopp 2015-02-09 10:56:19 UTC
distro updated to xf86-video-intel - 2.99.917 fixed this.
Seems kernel 3.18 is incompatible with older intel drivers.


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