[Pm-utils] Problems with 98smart-kernel-video and intel graphics chipsets

Matthew Garrett mjg59 at srcf.ucam.org
Sat Sep 27 16:10:17 PDT 2008

On Sat, Sep 27, 2008 at 01:28:03PM -0500, Victor Lowther wrote:
> On Sat, 2008-09-27 at 14:45 +0100, Matthew Garrett wrote:
> > On Sat, Sep 27, 2008 at 08:40:48AM -0500, Victor Lowther wrote:
> > 
> > > Good question, and unless I hear that it is a kernel bug I will release
> > > and 1.2.1 with a 98-smart-kernel-video that does not filter out
> > > all the vbe* quirks for Intel hardware.
> > 
> > Note that doing so will break some other machines.
> Only those for whom the quirks are incorrect to begin with, and it is
> apparent by the bug reports we have been getting the i915 changes in
> 2.6.26 did not by any stretch make the Intel DRM drivers quirk-free.

No, there's no deterministic way to determine whether the BIOS code will 
correctly deal with the state that the DRM code programs. It's entirely 
possible for a previously required quirk to start breaking machines. 
That's why we removed the quirks on these kernels in the first place.

Do bear in mind that radeon modesetting will also hit mainline soon, at 
which point an entirely different set of quirks will start breaking. I'm 
not entirely convinced that adding more quirks for anything other than 
nvidia is a sensible move at this point.
Matthew Garrett | mjg59 at srcf.ucam.org

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