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Re: [Bug 1467274] Re: Xorg radeon.dpm=1 causes glitches

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: foobar <hbaker1@xxxxxxxxxxxx>
Date: Sat, 04 Jul 2015 15:14:43 -0000
Reply-to: Bug 1467274 <1467274@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Re: "if you remove kernel parameters radeon.dpm=1
radeon.audio=0 are there any visual glitches?"

I believe so, but I'll check this again & send you another email.

As I mentioned in several bug reports, my goal is to minimize
the operating temperature of this laptop, which tends to run
hot even in Windows 7.

The good news is that Ubuntu 15.05 runs less hot than Win7 under
exactly the same workload -- playing the same videos with VLC.

Interestingly, the DIS GPU takes a lot more power to display
hidef H264 video than does the CPU, so the lowest power way to
play videos is to keep the DIS GPU completely turned off, and
to clamp the operating freq of the triple cores to 800MHz.  Thanks
to clever programming for h264 decode, there is still enough
computing power of 3 cores at 800MHz to display the video.

For 1080p, I have to unclamp the cpu frequencies ("ondemand" v
"low"), but this raises the operating temperature by only a
handful of degrees C.

At 07:28 AM 7/4/2015, Christopher M. Penalver wrote:
>foobar, just to confirm, if you remove kernel parameters radeon.dpm=1
>radeon.audio=0 are there any visual glitches?
>
>** Tags removed: needs-full-computer-model
>** Tags added: latest-bios-f.29
>
>** Summary changed:
>
>- Xorg radeon.dpm=1 causes glitches
>+ [HP Pavilion dv7-4272us] Xorg radeon.dpm=1 causes glitches
>
>-- 
>You received this bug notification because you are subscribed to the bug
>report.
>https://bugs.launchpad.net/bugs/1467274
>
>Title:
>  [HP Pavilion dv7-4272us] Xorg radeon.dpm=1 causes glitches
>
>Status in xorg package in Ubuntu:
>  Incomplete
>
>Bug description:
>  Setting radeon.dpm=1 keeps causing glitches 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.
>
>  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.
>
>  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]
>  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
>
>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
Touch seeded packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1467274

Title:
  [HP Pavilion dv7-4272us] Xorg radeon.dpm=1 causes glitches

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Setting radeon.dpm=1 keeps causing glitches 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.

  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.

  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]
  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
[Bug 1467274] Re: Xorg radeon.dpm=1 causes glitches
From: Christopher M. Penalver, 2015-07-04