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    SubjectRe: [git pull] drm for rc1
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    On Tue, Jan 11, 2011 at 4:28 PM, Dave Airlie <airlied@gmail.com> wrote:
    > On Tue, Jan 11, 2011 at 4:06 PM, Jesse Barnes <jbarnes@virtuousgeek.org> wrote:
    >> "Dave Airlie" <airlied@gmail.com> wrote:
    >>
    >>>On Tue, Jan 11, 2011 at 2:16 PM, Linus Torvalds
    >>><torvalds@linux-foundation.org> wrote:
    >>>> On Mon, Jan 10, 2011 at 2:59 PM, Dave Airlie <airlied@linux.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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