Comment 0 for bug 1085245

== Quantal SRU Justification ==

Beginning with the 12.04.2 point release, we are providing the 12.10 kernel as an enablement vehicle. Haswell graphics is a highly requested and sought after platform to be enabled with the 12.04.2 point release via the 12.10 kernel. Full enablement support will unfortunately not be available by default until the upstream v3.8 kernel. Given our release time frames, waiting for the v3.8 kernel to land in an official Ubuntu release and propagate back into 12.04 will take too long.

== Fix ==
As an alternative solution, we can provide an updated snapshot of the i915 driver which is currently making it's way through the drm-intel tree and slated to land in v3.8. This updated version of the i915 driver being proposed for the Quantal kernel is being renamed to i915_hsw and will only support Haswell pci id's. There should be no risk of regression for the existing i915 driver with non-Haswell hardware.

The snapshot was taken from the following repo which is a v3.6 based tree with only the Haswell enablement patches applied. It should be less volatile thatn the drm-intel-nightly branch:

git://people.freedesktop.org/~danvet/drm backport-3.6

The set of patches I'm proposed for the Quantal kernel can be reviewed at:

git://kernel.ubuntu.com/ogasawara/ubuntu-quantal.git hsw-backport-3.6