Re: [Xen-devel] question about i915 driver in dom0

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Konrad Rzeszutek Wilk [mailto:konrad@xxxxxxxxxx]
> Sent: Wednesday, January 04, 2012 12:59 AM
> 
> On Tue, Dec 27, 2011 at 06:47:44AM +0000, Tian, Kevin wrote:
> > Hi, Konrad
> 
> Hey!
> 
> Sorry for taking so long to respond. Holidays.

good season for relax. :-)

> >
> > wiki page
> (http://wiki.xensource.com/xenwiki/XenPVOPSDRM.html#head-4da1a9004971
> 6207b9c672fd78187b0c77767be0)
> > says that "i915_hangcheck_eplased" error observed with i915 driver.
> >
> > Do you have a latest update on this issue? Is it still the outstanding 
> > issue, or
> fixed in
> > recent kernels?
> 
> I hadn't seen it... but then my main desktop box where I run intensive
> tests (ie, games) is radeon and nvidia so hadn't really tried seen this.
> The box that has i915 just does some simple framebuffer manipulation and
> that looks OK.

yes, framebuffer console works well in my side too.

> 
> >
> > I'm using Linux 3.2-rc4, with same error observed when trying to launch
> glxgear. So
> > want to understand whether it's due to my kernel version, or config
> option... :-)
> 
> Do you see the same symptoms - checkboard screen?

Not exactly. The screen becomes white, and then the system becomes
unstable and hang several minutes later. It's possible that mine is a 
different issue than listed on the wiki page, since many reasons may 
finally reach the same symptom - GPU hang... :/

> 
> The LKML had some fixes for this from Keith Packard. Something about
> using i915.semaphores=0 I think. And I thought I saw some fixes for
> 3.2-rc7 for this but not sure..

I'll have a try on latest Linux on this. But I suspect that this may be a
virtualization specific bug (e.g. similar gfn/mfn issue as nvidia case),
because same dom0 image could run glxgear smoothly on bare metal.

Thanks
Kevin

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel