found 697029 linux/3.7.3-1~experimental.1 tags 697029 - wontfix affects 697029 + release-notes quit
Hi, Chris Wilson wrote: > The performance issue on 3.7 is not due to the missed irq, but a > combination of using UXA and VT-d. In order to workaround an erratum > on Ironlake, every time we touch the GPU's page tables, we have to > idle the GPU before doing so. This causes extremely noticeable display > lag. Pierre AUSSAGUEL wrote: > Appending intel_iommu=off seems to fix the problem (I tested a few > days befor posting). Daniel Vetter wrote: > Since we can't fix the hw, closing this as wontfix. Thanks for > reporting this issue anyway. That makes this a distro issue, I suppose. Ben and X team, any ideas? Would it makes sense to disable intel_iommu by default on this hardware and require intel_iommu=on to reenable it? Should GNOME somehow detect that it should use classic mode by default when the iommu is enabled? If we can't come up with a workaround, this should be mentioned in the release notes to prevent a regression on upgrade. Please feel free to remind me in that case so I can come up with some wording (though I also wouldn't mind if someone else does). Thanks, Jonathan -- To UNSUBSCRIBE, email to debian-x-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20130223200532.GA3222@elie.Belkin
