[coreboot] Intel native graphics init: Questions about GTT setup

[Paul Menzel]

Am Sonntag, den 08.06.2014, 16:40 -0700 schrieb Anthony Martin:
> Paul Menzel once said:
> > since Linux 3.12+ graphics stolen memory seems to be used, which causes
> > a regression with coreboot and native graphics init at least on the
> > Intel 945 based Lenovo X60 [1].
> > 
> > This seems to be solved by properly setting register `PGETBL_CTL` [2],
> > but the Linux kernel Intel graphics driver still reports a GTT (Graphics
> > Translation Table) related error during start-up, but everything else
> > seems to work.
> > 
> >         [    1.235640] [drm] GPU crash dump saved to /sys/class/drm/card0/error
> >         [    1.236583] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
> >         [    1.236583] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
> >         [    1.236583] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
> >         [    1.236583] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
> >         [    1.236583] i915: render error detected, EIR: 0x00000010
> >         [    1.236583] i915: page table error
> >         [    1.236583] i915:   PGTBL_ER: 0x00000013
> >         [    1.236583] [drm:i915_report_and_clear_eir] *ERROR* EIR stuck: 0x00000010, masking
> >         [    1.236583] i915: render error detected, EIR: 0x00000010
> >         [    1.236583] i915: page table error
> >         [    1.236583] i915:   PGTBL_ER: 0x00000013
> > 
> 
> FWIW, I will occasionally get the same message and the apparent
> working behavior after resume on a MacBook2,1 using stock Apple
> EFI firmware. The MacBook uses the same chipset as the X60.
> 
> [49087.421096] [drm] GPU crash dump saved to /sys/class/drm/card0/error
> [49087.421096] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
> [49087.421097] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
> [49087.421097] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
> [49087.421098] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
> [49087.421763] i915: render error detected, EIR: 0x00000010
> [49087.421763] i915: page table error
> [49087.421763] i915:   PGTBL_ER: 0x00000001
> [49087.421763] [drm:i915_report_and_clear_eir] *ERROR* EIR stuck: 0x00000010, masking
> [49087.421763] i915: render error detected, EIR: 0x00000010
> [49087.421763] i915: page table error
> [49087.421763] i915:   PGTBL_ER: 0x00000001

That is good to know! Did you do as the messages suggest and submit a
bug report? Could you do so please and attach the GPU crash dump too?


Thanks,

Paul
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