** Description changed: == 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. + kernel as an enablement vehicle. Enablement for Haswell graphics has + been a frequent request and highly sought after for the 12.04.2 point + release coupled with the 12.10 kernel and X stack. Full enablement + support for Haswell 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 greatly delay our ability to support Haswell in the near + future. As an alternative solution, I'm am proposing we provide an + updated i915 driver in Quantal with Haswell support. == 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. + We can provide an updated snapshot of the i915 driver which supports Haswell and is currently making it's way through the drm-intel tree and targeted to land in the upstream v3.8. This updated version of the i915 driver being proposed here for the Quantal kernel will only support Haswell pci id's which should greatly reduce the risk of regression to non-Haswell hardware. The following set of patches introduces this updated i915 driver as an Ubuntu driver (ie ubuntu-quantal/ubuntu/i915) and will be renamed to "i915_hsw". - 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: + The updated i915 snapshot was taken from + "git://people.freedesktop.org/~danvet/drm backport-3.6" which was + specifically provided by Intel to help with backporting efforts. It is + a v3.6 based tree with only the Haswell enablement patches applied on + top. It should be less volatile than a drm-intel-nightly branch which + contains the same Haswell support. The set of patches I'm proposing for + the Quantal kernel can be reviewed at: - git://people.freedesktop.org/~danvet/drm backport-3.6 + git://kernel.ubuntu.com/ogasawara/ubuntu-quantal.git hsw-backport-3.6 - The set of patches I'm proposed for the Quantal kernel can be reviewed - at: + I would note I did have to backport some patches which touch outside the + ubuntu/i915 space. However, I hope most are straightforward enough to + see they pose no risk of regression (ie they only introduce new + #define's or functions which are only used by this newer driver). I + would also note I did need to also cherry-pick some drm/fb-helper + patches which were listed in the backport-3.6 branch from Intel in order + to resolve some VGA issues I was seeing while testing. I hope those are + also straightforward when reviewing. - git://kernel.ubuntu.com/ogasawara/ubuntu-quantal.git hsw-backport-3.6 + == Testing == + I've tested this on a Beta Shark Bay Desktop SDP replicating the same package combination we'll see with the 12.04.2 point release, ie Precise + Quantal X stack + Quantal test kernel. I see significant improvements compared to a stock Quantal kernel. With a stock Quantal kernel, the system is unusable and the monitor powers off 3secs into booting anyways. With the proposed set of patches I'm able to successfully boot and connect a monitor over HDMI and VGA. I also did some general smoke testing of suspend/resume, audio, ethernet, wifi, reboot/shutdown, 3D, and monitor hotplugging all of which passed with the exception of suspend/resume failures over VGA which I'm told is a known issue that is being addressed. I have also tested this on all my non-Haswell hardware I have and can confirm I see no regressions.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1085245 Title: [Quantal] Include support for Haswell hardware To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1085245/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
