[Bug 101347] HDMI/DP audio stuttering with DP MST on 4.11

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101347

elizabethx.de.la.torre.mena at intel.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #1 from elizabethx.de.la.torre.mena at intel.com ---
(In reply to Sebastian Reichel from comment #0)
> Hi,
> 
> I have a Thinkpad X250 (i7 from Broadwell generation) on Ultradock (that has
> a DP MST switch) connected to Yamaha RX-V475. At least once per minute the
> sound stops shortly for less than a second and then continues normally. This
> is very annoying and basically renders MST audio support useless, but I did
> not investigate further so far. The graphical output does _not_ have this
> problem and continues working normally. The Yamaha av-receiver has a small
> segment display, which changes it text, but it changes back too fast for me
> to read. I guess it notices, that the audio stream broke up. I don't see
> anything useful in dmesg (this is without any special debug flags in kernel
> parameters).
> 
> -- Sebastian

Hello Sebastian, could you please add the following parameter in the grub:
"drm.debug=0xe", and after that get the dmesg and kern.log and attach them.
Thanks.

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