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-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1467274

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

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1467274/+subscriptions

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