[Bug 70254] [snb dp hotplug] Pipe B, PCH transcoder B FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70254

--- Comment #49 from Ricardo Salveti de Araujo <rsalveti at gmail.com> ---
(In reply to comment #40)
> Created attachment 94766 [details] [review]
> drm/i915: Increase WM memory latency values on SNB with high pixel clock
> 
> This patch should make the driver automagically increase the latency values
> when encoutering a high resolution display. Please test and report back
> whether it works as intended.

Backported this patch on top of latest 3.13 based Ubuntu kernel tree, and
indeed fixed the issue described by this bug (you can find more details at
https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1239186).

Let me know if you need any further testing before sending the patch upstream.

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