[Bug 103786] DP audio does not work with Thinkpad Ultra Dock and DP-to-HDMI converter

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103786

Lakshmi <lakshminarayana.vudum at intel.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |NEEDINFO

--- Comment #43 from Lakshmi <lakshminarayana.vudum at intel.com> ---
(In reply to Jan Hoffmann from comment #42)
> I tested with another adapter, the CAC-1080 (which apparently uses a
> MCDP2900 converter chip). With this adapter, audio works fine.
> 
> However, with the CAC-1080, 4K video at 60 Hz only works reliably on the
> laptop DP port. When connected through the MST hub in the docking station,
> the highest stable setting seems to be 3840x2160 at 23.98 Hz. Anything
> higher results in the display showing nothing or a broken picture (sound can
> sometimes be heard though).
> 
> Similar to the CAC-1070, everything works without issues on Windows.
> 
> So both adapters work fine on the internal DP port, but fail in different
> ways when connected via the docking station.

Thanks for the feedback.

So with CAC-1080, audio works fine (which is the original issue)? At the moment
display is not working as expected via docking station. Did I understood
correctly?

Can you verify the issue with latest drmtip and attach the logs?

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