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