[Bug 71267] sna: (Haswell) X-server freezes when enabling DP at docking station

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71267

--- Comment #56 from Georg Pichler <georgpichler at gmx.at> ---
(In reply to comment #54)
> (In reply to comment #53)
> > (In reply to comment #50)
> > > I also ran into this with a Thinkpad T440 and an Ultra Dock.
> > > 
> > > I tried the patch in Comment 11 as well as changing the udelay(100) to
> > > udelay(500), that Comment 29 mentioned. Didn't change anything: As soon as I
> > > plug a monitor via VGA or DVI in the dock, the screen freezes and returns to
> > > normal on undocking.
> > > 
> > > I would be happy to supply further information, if you tell me what you need.
> > 
> > My bad. I tried it today with the DiplayPort connectors: Works like a charm
> > with the patched kernel. But, the DVI and VGA ports on the dock don't work.
> 
> Does the HDMI port work for you?

I don't know. Sadly i didn't have a device to try it out. I will try, when I
get back to work after the holidays.
And just for reference, i used Attachment #91164 against the 3.13-rc4 vanilla
kernel.

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