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    SubjectRe: render error detected, EIR: 0x00000010
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    On Fri, 14 May 2010 03:59:08 +0530, Jaswinder Singh Rajput <jaswinderlinux@gmail.com> wrote:
    > Hello Chris,
    >
    > I am also getting display error on another PC :
    >
    > [ 34.198957] render error detected, EIR: 0x00000010
    > [ 34.198972] [drm:i915_handle_error] *ERROR* EIR stuck: 0x00000010, masking
    > [ 34.198998] render error detected, EIR: 0x00000010

    Wow. Things are really amiss there. MI_SET_CONTEXT (the first instruction
    in the batch) was removed in

    commit 45f45c73469f1bd46a1b6fb206f2e9e5e4fd66b3
    Author: Eric Anholt <eric@anholt.net>
    Date: Mon Dec 29 11:26:11 2008 -0800

    Remove logical context setup.

    which explains why the destination bo is not on the active list, you
    have a pre-GEM UMS xf86-video-intel (so the batchbuffer is using absolute
    addressing rather than relocs and the kernel memory manager). The hardware
    is reporting a PTE error (in the overlay plane!) and the single active
    command is to clear the absolute buffer. As it is not being tracked by the
    kernel, I can't tell you what's wrong with the buffer, but most probably
    either the size or its stride is illegal in the context of that command.
    Or maybe even the GTT hasn't been fully initialised for the buffer, it is
    impossible to tell.

    In short, you can trade this bug against the risk of GTT incoherency that
    is endemic on i8xx by updating your driver.

    --
    Chris Wilson, Intel Open Source Technology Centre


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