[Bug 88124] i915: regression: after DP connected monitor is turned off, when turned on, it does not work anymore

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88124

--- Comment #18 from Jiri Pirko <jiri at resnulli.us> ---
(In reply to Manasi from comment #17)
> Thanks for testing with 410-rc6.
> I tried to reproduce it here at my end with 4.10-rc6 and I can't. But again
> in my case, the dmesg log says "Sink is not MST capable". But in your case,
> whats confusing is:
> 
> [    2.492671] [drm:intel_dp_read_desc [i915]] DP branch: OUI 90-cc-24
> dev-ID SYNA HW-rev 1.0 SW-rev 2.17
> [    2.493030] [drm:intel_dp_detect [i915]] Sink is MST capable
> 
> 
> This means somehow there is a branch device in the patch of laptop's DP and
> DP on the monitor. Are you using any kind of an adapter? Does your laptop
> have multiple DP connectors?

There is a docking station in between. I just ordered microdisplayport-display
port cable to be able to test this directly.


> 
> Could you also run this command and tell me what the output is with the
> monitor on and then after you see the problem:
> 
> sudo su
> cat /sys/kernel/debug/dri/0/i915_display_info

Will provide this at weekend. (I don't have the testing laptop with me now)


> 
> Regards
> Manasi

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20170207/559ffc3f/attachment.html>