Given that "kernel panic" was seen on the screen, I don't think this is a Compiz issue. Given that both people commenting in this bug have Broadcom cards, I suspect the problem is in bcmwl.
** Package changed: compiz (Ubuntu) => bcmwl (Ubuntu) ** No longer affects: compiz -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1402857 Title: crashed to text only screen, kernel panic Status in bcmwl package in Ubuntu: Triaged Bug description: I wasn't running anything other than Firefox, which had just been sitting stationary for about 10 minutes and then the screen went to some text only page. I only remember seeing the words "Kernel panic" in some of the lines. It's done it twice so far today. I'm not the most...tech savvy...person, so I'm not really sure how to fix this? ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: compiz-core 1:0.9.12.0+15.04.20141120-0ubuntu3 Uname: Linux 3.18.0-031800rc7-generic i686 NonfreeKernelModules: wl .tmp.unity.support.test.0: ApportVersion: 2.14.7-0ubuntu10 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 Date: Mon Dec 15 17:56:49 2014 DistUpgraded: Fresh install DistroCodename: vivid DistroVariant: ubuntu DkmsStatus: bcmwl, 6.30.223.248+bdcom, 3.16.0-28-generic, i686: installed bcmwl, 6.30.223.248+bdcom, 3.18.0-031800-generic, i686: installed bcmwl, 6.30.223.248+bdcom, 3.18.0-031800rc6-generic, i686: installed bcmwl, 6.30.223.248+bdcom, 3.18.0-031800rc7-generic, i686: installed EcryptfsInUse: Yes ExecutablePath: /usr/bin/compiz GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] RS880M [Mobility Radeon HD 4225/4250] [1002:9712] (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:0479] InstallationDate: Installed on 2014-11-29 (16 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release i386 (20141022.1) MachineType: Dell Inc. Inspiron One 2305 ProcEnviron: LANGUAGE=en_US PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.18.0-031800rc7-generic root=UUID=36d9257f-32a5-484d-b8ae-58dd9cc622ee ro quiet splash vt.handoff=7 SourcePackage: compiz UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/22/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A06 dmi.board.name: 0DPRF9 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 13 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnDellInc.:bvrA06:bd03/22/2011:svnDellInc.:pnInspironOne2305:pvrNotSpecified:rvnDellInc.:rn0DPRF9:rvrA00:cvnDellInc.:ct13:cvrNotSpecified: dmi.product.name: Inspiron One 2305 dmi.product.version: Not Specified dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.12.0+15.04.20141120-0ubuntu3 version.libdrm2: libdrm2 2.4.58-2 version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.2-0ubuntu1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.2-0ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.16.2.901-1ubuntu3 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 2:2.99.916+git20141119-1~exp1ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2 xserver.bootTime: Mon Dec 15 17:15:09 2014 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.16.2.901-1ubuntu3 xserver.video_driver: radeon To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1402857/+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