Robert Unverzagt, thank you for reporting this and helping make Ubuntu better.
As per https://wiki.ubuntu.com/Kernel/LTSEnablementStack the Utopic stack you are using is EOL as of August 2016. If you update to the supported Xenial stack is this still reproducible? ** Tags added: latest-bios-a10.11 ** Changed in: xorg (Ubuntu) Importance: Undecided => Low ** Changed in: xorg (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1608112 Title: radeon 0000:01:00.0: ring 0 stalled for more than 10016msec Status in xorg package in Ubuntu: Incomplete Bug description: While watching a video in full screen, video freezes followed by audio stopping, then display says "no signal." The first time this happens the video will begin again about 10 seconds later. However, when it happens again the display cannot be reactivated without a reboot. dmesg logs the above error message and the subsequent measures to softreset the GPU. Error occurs at 615 seconds. Graphics card is Radeon HD 7870. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xorg 1:7.7+1ubuntu8.1 ProcVersionSignature: Ubuntu 3.16.0-77.99~14.04.1-generic 3.16.7-ckt27 Uname: Linux 3.16.0-77-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.14.1-0ubuntu3.21 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: Sat Jul 30 13:29:21 2016 DistUpgraded: Fresh install DistroCodename: trusty DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] Pitcairn XT [Radeon HD 7870 GHz Edition] [1002:6818] (prog-if 00 [VGA controller]) Subsystem: Gigabyte Technology Co., Ltd Device [1458:2554] InstallationDate: Installed on 2016-07-26 (3 days ago) InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1) MachineType: MSI MS-7751 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-77-generic.efi.signed root=UUID=ff5b97bc-87e5-42fc-a7bc-63c9b50d1af1 ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/09/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V10.11 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z77A-GD65 (MS-7751) dmi.board.vendor: MSI dmi.board.version: 2.0 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: MSI dmi.chassis.version: 2.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV10.11:bd10/09/2013:svnMSI:pnMS-7751:pvr2.0:rvnMSI:rnZ77A-GD65(MS-7751):rvr2.0:cvnMSI:ct3:cvr2.0: dmi.product.name: MS-7751 dmi.product.version: 2.0 dmi.sys.vendor: MSI version.compiz: compiz 1:0.9.11.3+14.04.20160425-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.64-1~ubuntu14.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri N/A version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core N/A version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A xserver.bootTime: Sat Jul 30 13:13:52 2016 xserver.configfile: default xserver.devices: input Power Button KEYBOARD, id 6 input Power Button KEYBOARD, id 7 input Valve Software Steam Controller KEYBOARD, id 8 input Logitech Unifying Device. Wireless PID:404d KEYBOARD, id 9 xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.16.0-1ubuntu1.2~trusty2 xserver.video_driver: radeon To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1608112/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
