I would like to add that I've only noticed the problem when DVI/DP cables are used to connect the external monitor. VGA cable works just fine. I have a Lenovo T520 with these graphics:
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: NVIDIA Corporation GF119M [Quadro NVS 4200M] (rev a1) and two external monitors, the one connected with VGA works just fine but the second one connected with DVI has artifacts and rendering issues. A fix or workaround is very much appreciated. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1228506 Title: [prime] unsynchronised rendering on secondary displays Status in Accelerated Xorg driver for nVidia cards: Unknown Status in “xserver-xorg-video-intel” package in Ubuntu: Confirmed Bug description: Symptoms are the same as in bug https://bugs.launchpad.net/ubuntu/+source/unity-system-compositor/+bug/1221399 For example, see attached photo, replicable 100% just by moving the mouse fast. In bug https://bugs.launchpad.net/xmir/+bug/1218735 I was told to fill a new bug. Note that this Thinkpad has two video cards. I don't know how to tell if Intel or Nvidia is being used. I'm using the default saucy install, no additional drivers. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: xserver-xorg-video-intel 2:2.21.14-4ubuntu4 ProcVersionSignature: Ubuntu 3.11.0-5.11-generic 3.11.0 Uname: Linux 3.11.0-5-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.12.1-0ubuntu4 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true Date: Sat Sep 21 10:35:28 2013 DistUpgraded: Fresh install DistroCodename: saucy DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:21f5] NVIDIA Corporation GK107GLM [Quadro K1000M] [10de:0ffc] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:21f5] InstallationDate: Installed on 2013-09-13 (7 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130909) MachineType: LENOVO 2449A22 MarkForUpload: True ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-5-generic root=UUID=d9f16f85-5511-470f-972f-687054e80e8f ro quiet splash vt.handoff=7 SourcePackage: xserver-xorg-video-intel UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/21/2012 dmi.bios.vendor: LENOVO dmi.bios.version: G5ET90WW (2.50 ) dmi.board.asset.tag: Not Available dmi.board.name: 2449A22 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrG5ET90WW(2.50):bd12/21/2012:svnLENOVO:pn2449A22:pvrThinkPadW530:rvnLENOVO:rn2449A22:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 2449A22 dmi.product.version: ThinkPad W530 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.10+13.10.20130828.2-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.46-1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.2-1ubuntu1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.2-1ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.14.2.901-2ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu6 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.14-4ubuntu4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1 xserver.bootTime: Fri Sep 20 13:38:20 2013 xserver.configfile: default xserver.errors: Failed to load module "nvidia" (module does not exist, 0) Failed to load module "nvidia" (module does not exist, 0) NOUVEAU(G0): [XvMC] Failed to initialize extension. xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.14.2.901-2ubuntu4 To manage notifications about this bug go to: https://bugs.launchpad.net/nouveau/+bug/1228506/+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
