[Intel-gfx] [PATCH] Pipe-A underrun workaround for i830 chipset.

[Thomas Richter]

Dear Daniel, dear intel-experts,

please find a patch for the dreadful pipe-A underruns on the i830 
attached that works at least in the linear framebuffer mode. As far as 
the tiling mode is concerned, I'm still scratching my head about it. It 
as at this time unclear how precisely this works, but I'll keep looking.
At least this is something.

So long,
	Thomas
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