I was wrong, DebugWait didn't help. I disabled DebugWait again of course. It looks as if upgrading to kernel v3.19-rc1 did though.
I got the kernel here: http://kernel.ubuntu.com/~kernel- ppa/mainline/v3.19-rc1-vivid/ However, the commit ID of the patch doesn't match the one Daniel Vetter gave above. I found this though, with the same commit description: https://github.com/torvalds/linux/commit/656bfa3afc14e45e2d9e1624bf60d79b3beb12f2 In debugfs, I can see that the new code paths are getting hit: # cat /sys/kernel/debug/dri/0/i915_swizzle_info bit6 swizzle for X-tiling = bit9/bit10/bit11 bit6 swizzle for Y-tiling = bit9/bit11 DDC = 0x000f0002 DDC2 = 0x00000000 C0DRB3 = 0x0000 C1DRB3 = 0x0000 L-shaped memory detected -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1393205 Title: Intel q35 bug on Ubuntu 14.04 (Screen Artifacts) Status in X.org xf86-video-intel: Fix Released Status in xorg package in Ubuntu: Incomplete Bug description: Picture simliar of my problem: http://i.stack.imgur.com/0ARuB.jpg I went on a Ubuntu support chat website and was told that either this problem is a "glitch" or intel q35 doesn't support Ubuntu 14.04. From the chat they told me i should downgrade to Ubuntu 12 which i did but i really want to use Ubuntu 14. They also told me to make a bug report of this. Is this a glitch or is my graphics card unsupportive. --- .tmp.unity.support.test.0: ApportVersion: 2.14.1-0ubuntu3.6 Architecture: i386 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity DistUpgraded: Fresh install DistroCodename: trusty DistroRelease: Ubuntu 14.04 DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation 82Q35 Express Integrated Graphics Controller [8086:29b2] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Dell OptiPlex 755 [1028:0211] Subsystem: Dell OptiPlex 755 [1028:0211] InstallationDate: Installed on 2014-12-07 (1 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release i386 (20140722.2) MachineType: Dell Inc. OptiPlex 755 Package: xorg 1:7.7+1ubuntu8 PackageArchitecture: i386 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-40-generic root=UUID=a6415cdd-4ad1-4159-845e-83a5d2c7eecc ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.13.0-40.69-generic 3.13.11.10 Tags: trusty ubuntu compiz-0.9 Uname: Linux 3.13.0-40-generic i686 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 04/06/2010 dmi.bios.vendor: Dell Inc. dmi.bios.version: A17 dmi.board.name: 0GM819 dmi.board.vendor: Dell Inc. dmi.chassis.type: 6 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA17:bd04/06/2010:svnDellInc.:pnOptiPlex755:pvr:rvnDellInc.:rn0GM819:rvr:cvnDellInc.:ct6:cvr: dmi.product.name: OptiPlex 755 dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1 version.libdrm2: libdrm2 2.4.52-1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.2 version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.3 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 xserver.bootTime: Mon Dec 8 16:17:35 2014 xserver.configfile: default xserver.devices: input Power Button KEYBOARD, id 6 input Power Button KEYBOARD, id 7 input Microsoft Basic Optical Mouse MOUSE, id 8 input DELL DELL USB Keyboard KEYBOARD, id 9 input DELL DELL USB Keyboard KEYBOARD, id 10 xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 435 vendor ACR xserver.version: 2:1.15.1-0ubuntu2.1 To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1393205/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
