Re: [PATCH] drm/i915: Suppress spurious vblank interrupts

[Hugh Dickins]

On Tue, Feb 1, 2011 at 11:32 AM, Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> wrote:

> What I find strange is that you're seeing flip pending interrupts. ÂAre
> your symptoms affected if you remove the
> I915_DISPLAY_PLANE_[AB]_FLIP_PENDING_INTERRUPT lines from
> I915_INTERRUPT_ENABLE_FIX at the top of i915_irq.c?

No.  The first time it looked like yes it fixed it; but when I
rebooted again, same symptoms and same underruns back: this thing is
very erratic.

> Do you see any calls to drm_mode_page_flip_ioctl() in your environment?

None at all.

Sometime I should do a bisection between v2.6.36 and v2.6.37 to see
what started the underruns; but I can't promise when "sometime" will
arrive.

Hugh
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