Bug#807598: xserver-xorg-video-intel: [i915] No hardware acceleration

[Gilles Sadowski <gilles.sadowski@ulb.ac.be>]

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...


Thanks,
Gilles