Bug#807598: xserver-xorg-video-intel: [i915] No hardware acceleration
On Tue, Dec 15, 2015 at 03:24:59PM +0100, Julien Cristau wrote:
> On Tue, Dec 15, 2015 at 12:22:56 +0100, Gilles Sadowski wrote:
>
> > On Tue, Dec 15, 2015 at 09:05:38AM +0100, Julien Cristau wrote:
> > > On Thu, Dec 10, 2015 at 18:28:53 +0100, Gilles Sadowski wrote:
> > >
> > > > [ 2716.870] Current Operating System: Linux night 4.2.0-1-amd64 #1 SMP Debian 4.2.6-3 (2015-12-06) x86_64
> > >
> > > SKL isn't supported until (IIRC) Linux 4.3.
> >
> > What does it mean (from the perspective of a user)?
> > Linux certainly runs on it without any prominent warning that things could
> > blow out. ;-)
> > Also the installer did not complain in any way. [If it did, I could have
> > returned the machine (as I specifically indicated to the seller that it
> > should work with the current version of Debian).]
> >
> > The I915 driver for Intel graphics seems to exist for a long time.
> > The onboard graphics is a feature of the motherboard; so it is not obvious
> > at all that one should pay attention to not buy a current CPU.
> >
> > Specifying a linux parameter works around the problem, so I guess that it
> > should be indicated on the driver's Wiki page.
> > And, if possible, with an explanation (or link to one) of why upgrading a
> > CPU can make a graphics driver not work anymore...
> >
> It means you don't get graphics support on Linux on that CPU/GPU
> (they're the same chip) until 4.3. And no, turning on a "preliminary hw
> support" option is very much not something we should be recommending, on
> wiki pages or anywhere else.
I wouldn't discuss your choice of recommending, or not, the workaround.
I would however think important that this piece of information appears
somewhere (be it during install, or on the Wiki or <somewhere else>) so
that users like me would know what not to buy if they want to avoid nasty
surprises.
Best regards,
Gilles
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