The video glitches only happen when the GPU switches between the GPU on and the GPU off.
Otherwise, the display is solid, both when the GPU is enabled, and when it is disabled. Other symptoms: The GPU turns on and off every 3 seconds or so when the system first starts up. However, after the CPU's reach a certain temperature -- ~60 Celsius -- the GPU then seems to stay off (more-or-less). But if I start up VLC, VLC seems to try to turn the GPU on, and the whole cycle starts again. I have tried to disable "hardware decoding" in VLC, but apparently that is harder than it looks. I tried removing all of the VDPAU libraries, in hopes that VLC wouldn't be able to fiddle with the GPU. However, that didn't help. (It didn't hurt, either.) Something in the DRI module seems to want to keep the GPU turned on, and I want to keep it turned off. Please, please, tell me how to disable the GPU completely! Thanks. At 11:40 AM 1/18/2016, Christopher M. Penalver wrote: >foobar, to clarify, does the display glitches persist after the change >of the display, or only as it is changing? > >** Changed in: xorg (Ubuntu) > Status: New => Incomplete > >-- >You received this bug notification because you are subscribed to the bug >report. >https://bugs.launchpad.net/bugs/1467274 > >Title: > [HP Pavilion dv7-4272us] Display glitches occur > >Status in xorg package in Ubuntu: > Incomplete > >Bug description: > Display glitches occur every time the display changes from the IGD to > DIS, and vice versa. > > I'm trying to _keep the DIS GPU *turned off* in order to save power > and keep this laptop cool. > > I can't tell who keeps turning the DIS GPU back on, but I'd love to know how > to keep the DIS GPU locked OFF. > Jun 21 08:26:59 HP-ubuntu kernel: [ 8.039633] snd_hda_intel 0000:02:00.1: > Handle VGA-switcheroo audio client > Jun 21 08:27:07 HP-ubuntu kernel: [ 24.115390] snd_hda_intel 0000:02:00.1: > Disabling via VGA-switcheroo > Jun 21 08:27:07 HP-ubuntu kernel: [ 24.335777] snd_hda_intel 0000:02:00.1: > Cannot lock devices! > Jun 21 08:27:09 HP-ubuntu kernel: [ 26.313673] snd_hda_intel 0000:02:00.1: > Enabling via VGA-switcheroo > Jun 21 08:27:14 HP-ubuntu kernel: [ 31.891104] snd_hda_intel 0000:02:00.1: > Disabling via VGA-switcheroo > Jun 21 08:27:15 HP-ubuntu kernel: [ 32.011109] snd_hda_intel 0000:02:00.1: > Cannot lock devices! > > ... > > ProblemType: Bug > DistroRelease: Ubuntu 15.04 > Package: xorg 1:7.7+7ubuntu4 > ProcVersionSignature: Ubuntu 3.19.0-21.21-generic 3.19.8 > Uname: Linux 3.19.0-21-generic x86_64 > .tmp.unity.support.test.0: > > ApportVersion: 2.17.2-0ubuntu1.1 > 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 Jun 21 08:43:10 2015 > DistUpgraded: Fresh install > DistroCodename: vivid > DistroVariant: ubuntu > ExtraDebuggingInterest: Yes > GraphicsCard: > Â Advanced Micro Devices, Inc. [AMD/ATI] RS880M [Mobility Radeon HD > 4225/4250] [1002:9712] (prog-if 00 [VGA controller]) > Â Â Â Subsystem: Hewlett-Packard Company Device [103c:1641] > Â Advanced Micro Devices, Inc. [AMD/ATI] Robson CE [Radeon HD 6370M/7370M] > [1002:68e4] (prog-if 00 [VGA controller]) > Â Â Â Subsystem: Hewlett-Packard Company Radeon HD 6370M [103c:1641] > InstallationDate: Installed on 2015-06-06 (15 days ago) > InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) > MachineType: Hewlett-Packard HP Pavilion dv7 Notebook PC > ProcEnviron: > Â LANGUAGE=en_US > Â PATH=(custom, no user) > Â XDG_RUNTIME_DIR=<set> > Â LANG=en_US.UTF-8 > Â SHELL=/bin/bash > ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-21-generic > root=UUID=0a49d103-e2eb-4b21-a433-c41a1ef8d27b ro quiet splash radeon.dpm=1 > radeon.audio=0 vt.handoff=7 > SourcePackage: xorg > Symptom: display > Title: Xorg freeze > UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' > UpgradeStatus: No upgrade log present (probably fresh install) > dmi.bios.date: 02/25/2013 > dmi.bios.vendor: Hewlett-Packard > dmi.bios.version: F.29 > dmi.board.asset.tag: Base Board Asset Tag > dmi.board.name: 1641 > dmi.board.vendor: Hewlett-Packard > dmi.board.version: 67.33 > dmi.chassis.type: 10 > dmi.chassis.vendor: Hewlett-Packard > dmi.chassis.version: N/A > dmi.modalias: > dmi:bvnHewlett-Packard:bvrF.29:bd02/25/2013:svnHewlett-Packard:pnHPPaviliondv7NotebookPC:pvr0583120000242B20000620100:rvnHewlett-Packard:rn1641:rvr67.33:cvnHewlett-Packard:ct10:cvrN/A: > dmi.product.name: HP Pavilion dv7 Notebook PC > dmi.product.version: 0583120000242B20000620100 > dmi.sys.vendor: Hewlett-Packard > version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1 > version.ia32-libs: ia32-libs N/A > version.libdrm2: libdrm2 2.4.60-2 > version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.2-0ubuntu1 > version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A > version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.2-0ubuntu1 > version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3 > version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2 > version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2 > version.xserver-xorg-video-intel: xserver-xorg-video-intel > 2:2.99.917-1~exp1ubuntu2.2 > version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau > 1:1.0.11-1ubuntu2build1 > xserver.bootTime: Sun Jun 21 08:27:01 2015 > xserver.configfile: default > xserver.errors: RADEON(G0): [XvMC] Failed to initialize extension. > xserver.logfile: /var/log/Xorg.0.log > xserver.version: 2:1.17.1-0ubuntu3 > xserver.video_driver: radeon > >To manage notifications about this bug go to: >https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1467274/+subscriptions -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1467274 Title: [HP Pavilion dv7-4272us] Display glitches occur To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1467274/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
