linux-kernel - Re: [git pull] drm for rc1

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Date:	Mon, 10 Jan 2011 20:16:57 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Dave Airlie <airlied@...ux.ie>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Eric Anholt <eric@...olt.net>,
	Daniel Vetter <daniel.vetter@...ll.ch>
Cc:	DRI mailing list <dri-devel@...ts.freedesktop.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [git pull] drm for rc1

On Mon, Jan 10, 2011 at 2:59 PM, Dave Airlie <airlied@...ux.ie> wrote:
> Highlights:
> core/drivers: add support for high precision vblank timestamps
> radeon: pageflipping support, Gen2 PCIE support
> nouveau: reworked VRAM and VM support
> intel: better ILK/SNB powersaving support, Full GTT support

Lowlights: it's broken.

I get millions of messages like:

  ...
  [ 8482.000414] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck
timer elapsed... render ring idle [waiting on 30938, at 30938], missed
IRQ?
  [ 8485.918124] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck
timer elapsed... render ring idle [waiting on 31068, at 31068], missed
IRQ?
  [ 8487.926963] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck
timer elapsed... render ring idle [waiting on 31129, at 31129], missed
IRQ?
  ...

and everything is very choppy. I assume it's the power saving thing
that broke again, but that's just a total random guess, I have nothing
to actually back that up with.

It worked fine after boot, but those problems began at 8287.139375
(about two hours after boot - it may have coincided with screen saver,
but who knows?)  and have been happening constantly since. The machine
is not really usable, I'm writing this with annoying 2-second pauses
every once in a while.

This is a regular Core i5-670 with up-to-date Fedora-14, fwiw. Not my
sandybridge.

          Linus
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