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

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Date:	Tue, 11 Jan 2011 17:04:33 +1000
From:	Dave Airlie <airlied@...il.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dave Airlie <airlied@...ux.ie>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	Eric Anholt <eric@...olt.net>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	linux-kernel@...r.kernel.org,
	DRI mailing list <dri-devel@...ts.freedesktop.org>
Subject: Re: [git pull] drm for rc1

On Tue, Jan 11, 2011 at 4:28 PM, Dave Airlie <airlied@...il.com> wrote:
> On Tue, Jan 11, 2011 at 4:06 PM, Jesse Barnes <jbarnes@...tuousgeek.org> wrote:
>> "Dave Airlie" <airlied@...il.com> wrote:
>>
>>>On Tue, Jan 11, 2011 at 2:16 PM, Linus Torvalds
>>><torvalds@...ux-foundation.org> wrote:
>>>> 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.
>>>
>>>Okay I'll try and reproduce and curse Chris and Jesse, does booting
>>>with
>>>i915.powersave=0 help any?
>>>
>>>Dave.
>>
>> Arg.  It's been ok on my ILK systems, but Chris has found some issues with out watermarking code iirc; apparently we're underflowing the display FIFO, causing all sorts of trouble.  If it works before the pull of Dave's tree, can you bisect?
>>
>
> I think he'd fixed them in the tree I pulled locally to test, I'm
> guessing this might be that we are running the Fedora userspace driver
> and you guys are all on master or something, which would mean some ABI
> guarantee got busted.
>
> I'm going to try a local test upgrade to 2.14.0 just to see.

Okay that didn't help, dead in similar times, evince with a few flood
maps from Brisbane seem to be a good trigger.

I'm not sure I'll be in a good place for bisection, need laptop to
keep track of disaster.

Dave.
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