This has been fixed upstream in Mesa 10.4, which should eventually make it's way into Ubuntu 15.04 "Vivid Vervet". You can track that at https://launchpad.net/ubuntu/+source/mesa
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1234565 Title: serious opengl bug in 13.04 Status in Mesa: Unknown Status in mesa package in Ubuntu: New Bug description: Tested on two notebooks. Bug appears only in the 13.04 version. 12.10 is OK. Dubblechecked by booting a 12.10 version on USB stick (on the 13.04 notebooks). Problem: OpenGl shading language (GLSL) uniform variables seem to stay undefined, or lose their value somewhere. Tested with a WebGl app as well as a C++ (Qt) application. This bug is also reported a driver issue. If it is related to this driver issue, why is the (old) buggy driver re-installed with 13.04? thanks. ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: xorg 1:7.7+1ubuntu4 ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8 Uname: Linux 3.8.0-31-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.9.2-0ubuntu8.3 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: Thu Oct 3 10:02:20 2013 DistUpgraded: 2013-09-19 15:12:56,016 DEBUG enabling apt cron job DistroCodename: raring DistroVariant: ubuntu DkmsStatus: virtualbox, 4.2.10, 3.8.0-30-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:058b] InstallationDate: Installed on 2013-08-21 (42 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) MachineType: Dell Inc. Dell System XPS L322X MarkForUpload: True ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-31-generic root=/dev/mapper/ubuntu-root ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to raring on 2013-09-19 (13 days ago) dmi.bios.date: 05/15/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A09 dmi.board.name: 0PJHXN dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA09:bd05/15/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn0PJHXN:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.name: Dell System XPS L322X dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.9~daily13.06.19~13.04-0ubuntu1 version.ia32-libs: ia32-libs 20090808ubuntu36 version.libdrm2: libdrm2 2.4.43-0ubuntu1.1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.4-0ubuntu0.1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.4-0ubuntu0.1 version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu6 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.6-0ubuntu4.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1 To manage notifications about this bug go to: https://bugs.launchpad.net/mesa/+bug/1234565/+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