[Bug 93578] [SKL] Intel HD 520 failed to train DP when connected with a external monitor

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat Mar 18 09:56:13 UTC 2017


https://bugs.freedesktop.org/show_bug.cgi?id=93578

--- Comment #100 from Mads <mads at ab3.no> ---
(In reply to Mads from comment #95)
> Tested DP MST with a fresh drm-tip today (commit
> 0a03ea9496b49746b4964d05cc1f483385d1df8a), and it seems like daisy chaining
> triggers the same kind of behaviour as with the DA200 dongle, so maybe the
> error is related.
> 
> When Daisy chaining two Dell U2715H monitors through DisplayPort, the last
> monitor in the chain cannot get a resolution higher than the range
> previously mentioned here (1024x768 works, 1600x1200 does not, 1920x1080
> does not).

It just dawned on me that I tested this through a Dell WD15 docking, maybe DP
MST works if you don't use that (maybe the WD15 got the same data link issue as
DA200).

I got a standard non-Dell USB-C to DP dongle that I know works with 4k @ 60Hz,
I can try if DP MST works with that on monday.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the QA Contact for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20170318/4140bfc1/attachment.html>


More information about the intel-gfx-bugs mailing list