Will do, but not for a few more days.  I'm working on something with a deadline.

Thx for helping with this; there's no reason why radeon.dpm=0 and radeon.dpm=1
shouldn't *both* work, although somewhat differently.

At 04:07 AM 10/28/2015, you wrote:
>foobar, could you please test the latest upstream kernel available from
>the very top line at the top of the page from http://kernel.ubuntu.com
>/~kernel-ppa/mainline/?C=N;O=D (the release names are irrelevant for
>testing, and please do not test the daily folder)? Install instructions
>are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds . This
>will allow additional upstream developers to examine the issue.
>
>If the latest kernel did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this issue is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description:
>kernel-fixed-upstream
>kernel-fixed-upstream-X.Y-rcZ
>
>Where X, Y, and Z are numbers corresponding to the kernel version.
>
>If the mainline kernel does not fix the issue, please add the following tags:
>kernel-bug-exists-upstream
>kernel-bug-exists-upstream-X.Y-rcZ
>
>Please note, an error to install the kernel does not fit the criteria of
>kernel-bug-exists-upstream.
>
>Once testing of the latest upstream kernel is complete, please mark this
>report's Status as Confirmed. Please let us know your results.
>
>Thank you for your understanding.
>
>** Tags added: latest-bios-f.29
>
>** Tags added: regression-release
>
>** Package changed: xorg (Ubuntu) => linux (Ubuntu)
>
>** Changed in: linux (Ubuntu)
>   Importance: Low => Medium
>
>-- 
>You received this bug notification because you are subscribed to the bug
>report.
>https://bugs.launchpad.net/bugs/1509135
>
>Title:
>  Discrete Radeon graphics unit won't stay *off*
>
>Status in linux package in Ubuntu:
>  Incomplete
>
>Bug description:
>  After upgrading from Ubuntu 15.04 to 15.10, the AMD discrete card
>  keeps coming on.
>
>  ProblemType: Bug
>  DistroRelease: Ubuntu 15.10
>  Package: ubuntu-release-upgrader-core 1:15.10.14
>  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
>  Uname: Linux 4.2.0-16-generic x86_64
>  ApportVersion: 2.19.1-0ubuntu3
>  Architecture: amd64
>  CrashDB: ubuntu
>  CurrentDesktop: Unity
>  Date: Thu Oct 22 16:30:42 2015
>  InstallationDate: Installed on 2015-07-25 (89 days ago)
>  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
>  PackageArchitecture: all
>  SourcePackage: ubuntu-release-upgrader
>  Symptom: release-upgrade
>  UpgradeStatus: Upgraded to wily on 2015-10-22 (0 days ago)
>  VarLogDistupgradeTermlog:
>  --- 
>  .tmp.unity.support.test.0:
>   
>  ApportVersion: 2.19.1-0ubuntu3
>  Architecture: amd64
>  BootLog:
>   
>  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
>  CompositorRunning: compiz
>  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
>  CompositorUnredirectFSW: true
>  DistUpgraded: 2015-10-22 15:54:58,273 DEBUG enabling apt cron job
>  DistroCodename: wily
>  DistroRelease: Ubuntu 15.10
>  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] (rev ff) (prog-if ff)
>  InstallationDate: Installed on 2015-07-25 (94 days ago)
>  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
>  MachineType: Hewlett-Packard HP Pavilion dv7 Notebook PC
>  Package: xorg 1:7.7+7ubuntu4
>  PackageArchitecture: amd64
>  ProcEnviron:
>   LANGUAGE=en_US
>   TERM=xterm-256color
>   PATH=(custom, no user)
>   LANG=en_US.UTF-8
>   SHELL=/bin/bash
>  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic root=UUID=08f5c22a-157d-4ff4-886f-b5e3e42acd66 ro quiet splash radeon.dpm=0 vt.handoff=7
>  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
>  Tags:  wily ubuntu compiz-0.9
>  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
>  Uname: Linux 4.2.0-16-generic x86_64
>  UpgradeStatus: Upgraded to wily on 2015-10-22 (4 days ago)
>  UserGroups:
>   
>  _MarkForUpload: True
>  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 1:0.9.12.2+15.10.20151015-0ubuntu1
>  version.ia32-libs: ia32-libs N/A
>  version.libdrm2: libdrm2 2.4.64-1
>  version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
>  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
>  version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
>  version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
>  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
>  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
>  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4
>  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
>  xserver.bootTime: Tue Oct 27 11:19:09 2015
>  xserver.configfile: default
>  xserver.logfile: /var/log/Xorg.0.log
>  xserver.version: 2:1.17.2-1ubuntu9
>  xserver.video_driver: radeon
>
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