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SubjectRe: [3.9-rc1] irq 16: nobody cared (was [3.9-rc1] very poor interrupt responses)
On Fri, 15 Mar 2013, Greg KH wrote:

> > > > > I have the same problem on my Lenovo T500. I think the graphics card is
> > > > > involved.
> > > > >
> > > > > This laptop has "hybrid graphics" - one Intel GMA 4500MHD and one ATI
> > > > > Mobility Radeon HD 3650. When I boot with the Intel card, I get "irq 16:
> > > > > nobody cared" during boot, not when I boot with the ATI card.
> > > >
> > > > Confirming this. After a lot of hassle, I have bisected this reliably to
> > > >
> > > > commit 28c70f162a315bdcfbe0bf940a740ef8bfb918d6
> > > > Author: Daniel Vetter <daniel.vetter@ffwll.ch>
> > > > Date: Sat Dec 1 13:53:45 2012 +0100
> > > >
> > > > drm/i915: use the gmbus irq for waits
> > > >
> > > > Adding Daniel, Imre and Daniel to CC while I will try to figure out what's
> > > > happening in parallel.
> > >
> > > Wasn't this fixed by the merge from David
> > > (2cc79544bd0aabb4b3cf467ead5df526d9134c64)?
> >
> > Why do you think it should, please?
>
> The line:
> - Fix PCH irq handling race which resulted in missed gmbus/dp
> aux irqs and subsequent fallout (Paulo)

Ah, that one. I believe that should be irrelevant for GM chipsets, as they
don't have AUX line, right?

> > (I am seeing this with a2362d247 still).
>
> Ok, I guess it isn't still fixed properly, just was guessing :)

Seems like this is a different issue.

Thanks,

--
Jiri Kosina
SUSE Labs


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