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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #48 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to karlvlam from comment #47)
> any update for this issue?

This bug seems to have conflated a number of issues, AFAICS. Here's the
original report:

(In reply to Mário Antunes from comment #0)
> Dear all, I have a dell XPS 13 9350, with a external bus DA200. This adapter
> connects to the USB-C port and provides HDMI, VGA, 1x USB 3 and Ethernet.
> The usb port and the Ethernet are working correctly. However I am unable to
> connect a external monitor.

Let's stick to the issue about Skylake USB-C display here. Everyone else, with
any other issues, please file new bugs. Thank you.

USB-C support, I'm afraid, is still a work-in-progress. There are patches on
the list, but nothing I'd encourage you to try on Skylake at this time. :(

> The dmesg log points to drm intel drivers as the culprit:
> 
> [    4.526617]  [<ffffffffc02d3c4a>] skl_update_other_pipe_wm+0x1ba/0x1c0
> [i915]

This part is fixed (bug 89055) but should be of no significance to the USB-C
problems.

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