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    SubjectRe: 2.6.35 Radeon KMS power management regression?
    Date
    On Tuesday 01 June 2010, Dave Airlie wrote:
    > On Tue, Jun 1, 2010 at 4:23 PM, Nigel Cunningham
    > <ncunningham@crca.org.au> wrote:
    > > Hi all.
    > >
    > > Just wondering if anyone else has tried to hibernate while using Radeon KMS
    > > and a tree with Dave's post 2.6.34 patches? My 32 bit P4 based system (with
    > > an RV250 card) is hanging at the atomic copy, with the following backtrace
    > >
    > > hibernation_snapshot
    > > dpm_suspend_start
    > > async_synchronize_full
    > > async_synchronize_cookie
    > > async_synchronize_cookie_domain
    > >
    > > I've been trying to bisect, but this computer is being painfully slow, so I
    > > haven't been making much progress. 2.6.34 with the same config is fine, and
    > > my bisection progress so far seems to be pointing at the merge I mentioned
    > > above.
    >
    > The only thing I can think off might be the output polling task, or
    > the fix from Jerome for AGP suspend/resume
    > 10b06122afcc78468bd1d009633cb71e528acdc5 is AGP one to test
    >
    > disabling output polling is a messier revert, might be easier to just edit
    > drivers/gpu/drm/drm_crtc_helper.c:drm_kms_helper_poll_init and remove
    > the delayed_slow_work_enqueue call, also forcing repoll to false
    > inside output_poll_execute which should in theory stop the polling
    > from starting or being kicked off later.
    >
    > I'll try and recreate if I get a chance, cc'ing dri-devel also for Alex/Jerome.

    I'm not reproducing this on Acer Ferrari One (that has an rs780 IIRC),
    but it seems I can reproduce it on a desktop box with some PCIe r300.

    Tomorrow I'll try .35-rc1 on HP nx6325.

    Rafael


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