[Bug 99137] [SKL] Weird colours on usb-c to hdmi output

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99137

Jules Samuel Randolph <theswanted at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |theswanted at gmail.com

--- Comment #33 from Jules Samuel Randolph <theswanted at gmail.com> ---
Created attachment 140502
  --> https://bugs.freedesktop.org/attachment.cgi?id=140502&action=edit
Toshiba TV screen with broken colors

I can reproduce a similar issue.

Setup:

- Hardware: DELL XPS 9350 with Intel Graphics 520
- USB-C-Thunderbolt to HDMI Adapter: Aukey CB-C37
- External screen: TOSHIBA TV 43L420U
- Distro: Manjaro 17.1.11
- Kernels tested: 4.18rc2, 4.17.4-1, 4.16.18-1, 4.14.53-1, 4.9.111-1, 4.4.139-1 

Problem Description:

Colors are broken and screen ratio remains 4/3 whatever resolution I configure
from linux.

Attachments:

- A picture of the faulty screen
- A dmesg log with drm.debug=0xf module
- A xrandr query

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