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Re: [Bug 1467274] Re: [HP Pavilion dv7-4272us] Display glitches occur

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: foobar <hbaker1@xxxxxxxxxxxx>
Date: Sun, 05 Jul 2015 00:22:02 -0000
Reply-to: Bug 1467274 <1467274@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
After turning off radeon.dpm=1, the temperature at idle goes up about 2
degrees C.

However, if I then do

echo low > /sys/class/drm/card0/device/power_profile
echo low > /sys/class/drm/card1/device/power_profile

The temperature at idle goes down about 4 degrees C -- i.e., less than
when dpm=1.

The k10temp is now about 62.5 degrees C at idle.
The acpitz temperature is now about 62.0 degrees C at idle.

These temps are still much higher than my little ASUS laptops, which idle at about 50 degrees C,
but 62.5 degrees C is still perhaps 10-15 degrees cooler than when running certain apps on the same HP machine in Windows 7.

The internal temps of this HP laptop were so high running Windows7 that
they compromised the internal hard disk.

However, I was able to relocate the internal hard disk to another bay inside the laptop where it was 20 degrees cooler,
so I think I've now fixed the disk-frying problem.

At 02:38 PM 7/4/2015, Christopher M. Penalver wrote:
>** Summary changed:
>
>- [HP Pavilion dv7-4272us] Xorg radeon.dpm=1 causes glitches
>+ [HP Pavilion dv7-4272us] Display glitches occur
>
>** Description changed:
>
>- Setting radeon.dpm=1 keeps causing glitches every time the display
>- changes from the IGD to DIS and vice versa.
>+ Display glitches occur every time the display changes from the IGD to
>+ DIS, and vice versa.
>  
>- It may be related to the HDMI audio, which I tried to turn off using
>- radeon.audio=0.
>+ I'm trying to _keep the DIS GPU *turned off* in order to save power and
>+ keep this laptop cool.
>  
>- Below are the lines from the kernel log having to do with snd_hda_intel
>- (which shouldn't be there when radeon.audio=0).  I'm trying to _keep the
>- DIS GPU *turned off* in order to save power & 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.
>- 
>+ 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!
>- Jun 21 08:27:17 HP-ubuntu kernel: [   33.986011] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:27:24 HP-ubuntu kernel: [   41.882048] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:27:25 HP-ubuntu kernel: [   42.002129] snd_hda_intel 0000:02:00.1: Cannot lock devices!
>- Jun 21 08:27:37 HP-ubuntu kernel: [   54.370654] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:27:42 HP-ubuntu kernel: [   60.151334] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:27:43 HP-ubuntu kernel: [   60.272329] snd_hda_intel 0000:02:00.1: Cannot lock devices!
>- Jun 21 08:27:45 HP-ubuntu kernel: [   62.586013] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:27:50 HP-ubuntu kernel: [   68.187551] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:27:51 HP-ubuntu kernel: [   68.307916] snd_hda_intel 0000:02:00.1: Cannot lock devices!
>- Jun 21 08:27:53 HP-ubuntu kernel: [   70.311697] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:27:58 HP-ubuntu kernel: [   75.350919] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:27:58 HP-ubuntu kernel: [   75.471116] snd_hda_intel 0000:02:00.1: Cannot lock devices!
>- Jun 21 08:27:59 HP-ubuntu kernel: [   76.960028] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:28:04 HP-ubuntu kernel: [   82.198684] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:28:05 HP-ubuntu kernel: [   82.318660] snd_hda_intel 0000:02:00.1: Cannot lock devices!
>- Jun 21 08:28:06 HP-ubuntu kernel: [   83.808935] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:28:11 HP-ubuntu kernel: [   89.216865] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:28:12 HP-ubuntu kernel: [   89.336835] snd_hda_intel 0000:02:00.1: Cannot lock devices!
>- Jun 21 08:28:14 HP-ubuntu kernel: [   91.327234] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:28:19 HP-ubuntu kernel: [   96.356640] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:28:19 HP-ubuntu kernel: [   96.476630] snd_hda_intel 0000:02:00.1: Cannot lock devices!
>- Jun 21 08:28:21 HP-ubuntu kernel: [   98.583366] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:28:26 HP-ubuntu kernel: [  104.185234] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:28:27 HP-ubuntu kernel: [  104.305245] snd_hda_intel 0000:02:00.1: Cannot lock devices!
>- Jun 21 08:28:28 HP-ubuntu kernel: [  105.804332] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:28:33 HP-ubuntu kernel: [  111.206946] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:28:34 HP-ubuntu kernel: [  111.326995] snd_hda_intel 0000:02:00.1: Cannot lock devices!
>- Jun 21 08:28:36 HP-ubuntu kernel: [  113.310242] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:28:41 HP-ubuntu kernel: [  118.341024] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:28:41 HP-ubuntu kernel: [  118.461117] snd_hda_intel 0000:02:00.1: Cannot lock devices!
>- Jun 21 08:28:43 HP-ubuntu kernel: [  120.476298] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:28:48 HP-ubuntu kernel: [  126.179202] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:28:49 HP-ubuntu kernel: [  126.299191] snd_hda_intel 0000:02:00.1: Cannot lock devices!
>- Jun 21 08:28:50 HP-ubuntu kernel: [  127.782650] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:28:55 HP-ubuntu kernel: [  133.201728] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:28:56 HP-ubuntu kernel: [  133.321778] snd_hda_intel 0000:02:00.1: Cannot lock devices!
>- Jun 21 08:28:57 HP-ubuntu kernel: [  134.809172] snd_hda_intel 0000:02:00.1: Enabling via VGA-switcheroo
>- Jun 21 08:29:02 HP-ubuntu kernel: [  140.176341] snd_hda_intel 0000:02:00.1: Disabling via VGA-switcheroo
>- Jun 21 08:29:03 HP-ubuntu kernel: [  140.296434] 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:
>-  Advanced Micro Devices, Inc. [AMD/ATI] RS880M [Mobility Radeon HD 4225/4250] [1002:9712] (prog-if 00 [VGA controller])
>-    Subsystem: Hewlett-Packard Company Device [103c:1641]
>-  Advanced Micro Devices, Inc. [AMD/ATI] Robson CE [Radeon HD 6370M/7370M] [1002:68e4] (prog-if 00 [VGA controller])
>-    Subsystem: Hewlett-Packard Company Radeon HD 6370M [103c:1641]
>+ 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:
>-  LANGUAGE=en_US
>-  PATH=(custom, no user)
>-  XDG_RUNTIME_DIR=<set>
>-  LANG=en_US.UTF-8
>-  SHELL=/bin/bash
>+ 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
>
>-- 
>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
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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:
   Advanced Micro Devices, Inc. [AMD/ATI] RS880M [Mobility Radeon HD 4225/4250] [1002:9712] (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Device [103c:1641]
   Advanced Micro Devices, Inc. [AMD/ATI] Robson CE [Radeon HD 6370M/7370M] [1002:68e4] (prog-if 00 [VGA controller])
     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:
   LANGUAGE=en_US
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-21-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

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References

[Bug 1467274] [NEW] Xorg radeon.dpm=1 causes glitches
From: foobar, 2015-06-21