Re: Intel i915 freeze on latest git

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On Tue, 1 Feb 2011 15:07:55 +0100
Francesco Allertsen <fallertsen@xxxxxxxxx> wrote:

> On Tue, Feb 01, 2011 at 01:16:01PM +0000, Chris Wilson wrote:
> > Useful for me. Just confirms that you have an equivalent machine to
> > this Lenovo x201s, on which those patches were tested after receiving
> > from Jesse. :|
> 
> Yes, I have a Lenovo x201s :-P.
> 
> > The dmesg would have been useful to know whether the i915.ko module is
> > loaded during X startup, and so reveal some information about the sequence
> > of function calls (i.e. whether the modified routines were running at the
> > time of the hang, or whether they had completed much earlier during boot).
> > The drm.debug dmesg is usually a gold mine of information.
> 
> Attacched there is the full dmesg log.
> 
> > Another useful test is whether i915.powersave=0 also prevents the hang?
> 
> No, it doesn't have any effect.

Yeah I don't think we use that flag for rc6, though we probably should.

The bisect is interesting, I'd have expected a failure when we
re-enabled rc6 on ILK or when we fixed up the ring buffer init.

The cleanup patch should be just that, but at least reverting it
shouldn't cause any trouble.

-- 
Jesse Barnes, Intel Open Source Technology Center
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