[Bug 74102] [ILK/SNB/IVB/HSW Regression]igt/testdisplay causes *ERROR* Pipe A FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=74102

--- Comment #6 from Orion Poplawski <orion at cora.nwra.com> ---
Started seeing this:

[    3.124757] [drm:ilk_display_irq_handler] *ERROR* Pipe A FIFO underrun
[    3.124765] [drm:ibx_irq_handler] *ERROR* PCH transcoder A FIFO underrun
[    3.254099] Console: switching to colour frame buffer device 170x48

on boot with 3.15.3-200.fc20.x86_64, not with 3.14.8-200.fc20.x86_64.

00:02.0 0300: 8086:0046 (rev 12) (prog-if 00 [VGA controller])
        Subsystem: 17aa:215a

laptop with external VGA display.

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