Public bug reported: Affects fullscreen YouTube, VLC or OnLive.
Since Kubuntu 14.04 I have a screen tearing which is quite annoying... It looks like 4/5 of the screen gets painted on time and the rest is refreshed too late. The problem occurs since Kubuntu 14.04. Changing Nvidia drivers does not help. Currently I'm on the recommended 331.89 driver. No problem on Debian and previous versions of Kubuntu. Temporary resolution is: 1) Go to System Settings -> Desktop Effects 2) Go to Advanced tab 3) Change the Scaling Method to whichever other option 4) Apply settings The problem reoccurs after restart or resume from suspend or hybernation. --------------------------------------------------------------------- The following FIXED the problem completely: --------------------------------------------------------------------- Create file: /etc/profile.d/Tearing.sh Insert this code: export __GL_YIELD="USLEEP" Then make it executable with: chmod +x /etc/profile.d/Tearing.sh Once that's done, reboot. The GL_YIELD worked for me, and now vertical sync appears to be working as it should. (https://www.kubuntuforums.net/showthread.php?63946-No-vertical-sync- with-NVIDIA&highlight=tearing) --------------- Output of "sudo lshw -C display; lsb_release -a; uname -a; free -m" as follows: *-display description: VGA compatible controller product: G96 [GeForce 9500 GT] vendor: NVIDIA Corporation physical id: 0 bus info: pci@0000:01:00.0 version: a1 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vga_controller bus_master cap_list rom configuration: driver=nvidia latency=0 resources: irq:50 memory:e2000000-e2ffffff memory:c0000000-cfffffff memory:e0000000-e1ffffff ioport:2000(size=128) *-display description: Display controller product: 82G33/G31 Express Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 02 width: 32 bits clock: 33MHz capabilities: msi pm bus_master cap_list configuration: driver=i915 latency=0 resources: irq:47 memory:e3200000-e327ffff ioport:3460(size=8) memory:d0000000-dfffffff memory:e3100000-e31fffff No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Utopic Unicorn (development branch) Release: 14.10 Codename: utopic Linux CNRI-PC 3.16.0-18-generic #25-Ubuntu SMP Fri Sep 26 02:44:15 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux total used free shared buffers cached Mem: 7909 4353 3555 94 529 1306 -/+ buffers/cache: 2518 5391 Swap: 10001 0 10001 ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: xserver-xorg-core 2:1.16.0-1ubuntu1 ProcVersionSignature: Ubuntu 3.16.0-18.25-generic 3.16.3 Uname: Linux 3.16.0-18-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.7-0ubuntu2 Architecture: amd64 Date: Sun Sep 28 15:32:03 2014 ExecutablePath: /usr/bin/Xorg InstallationDate: Installed on 2014-09-13 (14 days ago) InstallationMedia: Kubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140826.1) ProcEnviron: SourcePackage: xorg-server UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: xorg-server (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug utopic -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1374976 Title: Screen tearing Nvidia - since Kubuntu 14.04 Status in “xorg-server” package in Ubuntu: New Bug description: Affects fullscreen YouTube, VLC or OnLive. Since Kubuntu 14.04 I have a screen tearing which is quite annoying... It looks like 4/5 of the screen gets painted on time and the rest is refreshed too late. The problem occurs since Kubuntu 14.04. Changing Nvidia drivers does not help. Currently I'm on the recommended 331.89 driver. No problem on Debian and previous versions of Kubuntu. Temporary resolution is: 1) Go to System Settings -> Desktop Effects 2) Go to Advanced tab 3) Change the Scaling Method to whichever other option 4) Apply settings The problem reoccurs after restart or resume from suspend or hybernation. --------------------------------------------------------------------- The following FIXED the problem completely: --------------------------------------------------------------------- Create file: /etc/profile.d/Tearing.sh Insert this code: export __GL_YIELD="USLEEP" Then make it executable with: chmod +x /etc/profile.d/Tearing.sh Once that's done, reboot. The GL_YIELD worked for me, and now vertical sync appears to be working as it should. (https://www.kubuntuforums.net/showthread.php?63946-No-vertical-sync- with-NVIDIA&highlight=tearing) --------------- Output of "sudo lshw -C display; lsb_release -a; uname -a; free -m" as follows: *-display description: VGA compatible controller product: G96 [GeForce 9500 GT] vendor: NVIDIA Corporation physical id: 0 bus info: pci@0000:01:00.0 version: a1 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vga_controller bus_master cap_list rom configuration: driver=nvidia latency=0 resources: irq:50 memory:e2000000-e2ffffff memory:c0000000-cfffffff memory:e0000000-e1ffffff ioport:2000(size=128) *-display description: Display controller product: 82G33/G31 Express Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 02 width: 32 bits clock: 33MHz capabilities: msi pm bus_master cap_list configuration: driver=i915 latency=0 resources: irq:47 memory:e3200000-e327ffff ioport:3460(size=8) memory:d0000000-dfffffff memory:e3100000-e31fffff No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Utopic Unicorn (development branch) Release: 14.10 Codename: utopic Linux CNRI-PC 3.16.0-18-generic #25-Ubuntu SMP Fri Sep 26 02:44:15 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux total used free shared buffers cached Mem: 7909 4353 3555 94 529 1306 -/+ buffers/cache: 2518 5391 Swap: 10001 0 10001 ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: xserver-xorg-core 2:1.16.0-1ubuntu1 ProcVersionSignature: Ubuntu 3.16.0-18.25-generic 3.16.3 Uname: Linux 3.16.0-18-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.7-0ubuntu2 Architecture: amd64 Date: Sun Sep 28 15:32:03 2014 ExecutablePath: /usr/bin/Xorg InstallationDate: Installed on 2014-09-13 (14 days ago) InstallationMedia: Kubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140826.1) ProcEnviron: SourcePackage: xorg-server UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1374976/+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
