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    SubjectRe: regression(?) 3.3-rc4 -> 3.3-rc5: drm intel hangs
    On Tue, Feb 28, 2012 at 01:03:27PM +0900, Norbert Preining wrote:
    > Dear all,
    >
    > (please Cc)
    >
    > since upgrade to 3.3-rc5 I see the following behaviour repeatedly:
    >
    > Feb 28 11:42:47 mithrandir kernel: [15627.756071]
    > [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
    > Feb 28 11:42:47 mithrandir kernel: [15627.756087] [drm] capturing error
    > event; look for more information in /debug/dri/0/i915_error_state

    Wee need this i915_error_state file from debugfs (you might need to mount
    that first again) to diagnose gpu hangs. Also, it only contains
    information after a crash, so you need to rehang your machine if you've
    rebooted since then.

    Thanks, Daniel

    > Feb 28 11:42:47 mithrandir kernel: [15627.758428] [drm:i915_wait_request] *ERROR* i915_wait_request returns -11 (awaiting 7 at 4, next 8)
    > Feb 28 11:42:47 mithrandir kernel: [15628.260094] [drm:i915_reset] *ERROR* Failed to reset chip.
    >
    > Is this is known issue?
    >
    > hardware Intel GM45 Chipset
    > more dmesg parts:
    > [ 0.566805] agpgart-intel 0000:00:00.0: Intel GM45 Chipset
    > [ 0.566925] agpgart-intel 0000:00:00.0: detected gtt size: 2097152K total, 262144K mappable
    > [ 0.569079] agpgart-intel 0000:00:00.0: detected 65536K stolen memory
    > [ 0.569278] agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xc0000000
    > ...
    > [ 2.032297] [drm] Initialized drm 1.1.0 20060810
    > [ 2.032372] i915 0000:00:02.0: power state changed by ACPI to D0
    > [ 2.032429] i915 0000:00:02.0: power state changed by ACPI to D0
    > [ 2.032489] i915 0000:00:02.0: setting latency timer to 64
    > [ 2.085250] i915 0000:00:02.0: irq 43 for MSI/MSI-X
    > [ 2.085260] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
    > [ 2.085318] [drm] Driver supports precise vblank timestamp query.
    > [ 2.085439] [drm:intel_dsm_pci_probe] *ERROR* failed to get supported _DSM functions
    > [ 2.085527] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
    > [ 2.769842] fbcon: inteldrmfb (fb0) is primary device
    > [ 2.771391] [drm] Changing LVDS panel from (+hsync, +vsync) to (-hsync, -vsync)
    > [ 3.304756] Console: switching to colour frame buffer device 200x56
    > [ 3.308853] fb0: inteldrmfb frame buffer device
    > [ 3.308855] drm: registered panic notifier
    > [ 3.329552] acpi device:01: registered as cooling_device2
    > [ 3.329713] input: Video Bus as /devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:00/input/input2
    > [ 3.329766] ACPI: Video Device [OVGA] (multi-head: yes rom: no post: no)
    > [ 3.329881] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
    >
    >
    > Best wishes
    >
    > Norbert
    > ------------------------------------------------------------------------
    > Norbert Preining preining@{jaist.ac.jp, logic.at, debian.org}
    > JAIST, Japan TeX Live & Debian Developer
    > DSA: 0x09C5B094 fp: 14DF 2E6C 0307 BE6D AD76 A9C0 D2BF 4AA3 09C5 B094
    > ------------------------------------------------------------------------
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    > --- Douglas Adams, The Meaning of Liff
    >
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    --
    Daniel Vetter
    Mail: daniel@ffwll.ch
    Mobile: +41 (0)79 365 57 48


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