ubuntu-x-swat team mailing list archive

[Bryce Harrington <686388@xxxxxxxxxxxxxxxxxx>]

Upstream thinks the following two kernel patches (currently on drm-
intel-staging) might resolve the issue, however they require testing
before they'll commit to them:


commit e6793fa5504ac5c09a8f22f907c2b5f4543af7d9
Author: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Date:   Tue Mar 29 10:40:27 2011 +0100

    drm/i915: Disable all outputs early, before KMS takeover
    
    If the outputs are active and continuing to access the GATT when we
    teardown the PTEs, then there is a potential for us to hang the GPU.
    The hang tends to be a PGTBL_ER with either an invalid host access or
    an invalid display plane fetch.
    
    Reported-by: Pekka Enberg <penberg@xxxxxxxxxx>
    Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
    Tested-by: Daniel Vetter <daniel.vetter@xxxxxxxx> (855GM)


commit b023d74ad16336ea07fb237b52899df6df63e4b2
Author: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Date:   Tue Mar 29 13:19:09 2011 +0100

    drm/i915: Move the irq wait queue initialisation into the ring init
    
    Required so that we don't obliterate the queue if initialising the
    rings after the global IRQ handler is installed.
    
    Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>



** Changed in: xserver-xorg-video-intel (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/686388

Title:
  [i965gm] GPU lockup - Invalid GTT entry during Display B Fetch