Xorg freezes when rendering webGL

[Kai Mast]

On vivid I went to the following URL: http://www.ambiera.at/coppercube/demos/version5/watertest/

When I click on "switch to terrain scene" my system freezes.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: xorg 1:7.7+7ubuntu2
ProcVersionSignature: Ubuntu 3.19.0-7.7-generic 3.19.0
Uname: Linux 3.19.0-7-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.16.1-0ubuntu2
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
CurrentDesktop: Unity
Date: Sun Mar 1 14:34:06 2015
DistUpgraded: 2015-01-24 16:21:53,459 DEBUG enabling apt cron job
DistroCodename: vivid
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GpuHangFrequency: Very infrequently
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Turks PRO [Radeon HD 7570] [1002:675d] (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:2b20]
InstallationDate: Installed on 2014-07-25 (219 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Dell Inc. OptiPlex 7010
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-7-generic root=UUID=e505ac2d-47bc-4eb6-8759-06d542cb82b8 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
SystemImageInfo:
 current build number: 0
 device name:
 channel: daily
 last update: Unknown
Title: Xorg freeze
UpgradeStatus: Upgraded to vivid on 2015-01-24 (35 days ago)
dmi.bios.date: 09/09/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A16
dmi.board.name: 0GY6Y8
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA16:bd09/09/2013:svnDellInc.:pnOptiPlex7010:pvr01:rvnDellInc.:rn0GY6Y8:rvrA03:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 7010
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.12.1+15.04.20150213-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.59-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.0~rc2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.0~rc2-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.16.2.901-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
xserver.bootTime: Sun Mar 1 14:28:28 2015
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input Logitech USB Optical Mouse MOUSE, id 8
 input Dell Dell USB Entry Keyboard KEYBOARD, id 9
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.16.2.901-1ubuntu4
xserver.video_driver: radeon

[penalvch (penalvch)]

Kai Mast, thank you for reporting this and helping make Ubuntu better. As per http://www.dell.com/support/home/us/en/04/product-support/product/optiplex-7010/drivers an update to your computer's buggy and outdated BIOS is available (A20). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it change anything?

If it doesn't, could you please both specify what happened, and provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date

For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette .

Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. As well, you don't have to create a new bug report.

Once the BIOS is updated, and the information above is provided, then please mark this report Status New.

Thank you for your understanding.

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]