Hi Christopher: OK, I have some additional information.
1. I finally figured out a way to kill the Radeon HDMI audio: echo 1 > /sys/bus/pci/devices/0000:02:00.1/remove If I do this after I log into Ubuntu, the Radeon HDMI option is gone, and won't return until I reboot. The other audio devices -- e.g., the analog headphone jack -- continues to work just fine. However, I have not been able to figure out how to kill this HDMI audio device early in the boot sequence, so that the HDMI audio is *never* enabled. Unfortunately, trying to do the same thing with PCI 02:00.0 device -- i.e., the Radeon "DIS" discrete graphics card -- doesn't work; I have to reboot the entire system. 2. The latest (vmlinuz-4.3.0-040300) works the same as the 15.10 kernel; no better, no worse -- at least as far as the Radeon graphics is concerned. Symptoms: the Radeon discrete graphics unit (DIS) unit keeps turning off and on every 5 seconds or so. I used to think that it was the HDMI audio that was somehow triggering this, but now that I learned how to turn the HDMI audio off (see above), I can see that this is not the case. 3. There may be some interaction with the VLC video player. Even though I've told VLC to not use any hardware (i.e., GPU) acceleration, VLC may still be trying to turn on the DIS discrete graphics unit. I haven't been able to find any documentation about how to keep VLC from trying to turn on the DIS graphics unit. I'm open to other suggestions about how to keep the DIS unit turned off. BTW, for some reason, the older (non-DPM) mode for this Radeon graphics unit no longer works correctly. The following command: cat /sys/kernel/debug/vgaswitcheroo/switch tells me that the power state of DIS is "DynOff", even when I boot the machine with radeon.dpm=0. It shouldn't say "DynOff"; it should simply say "Off". 4. I did notice one small change from the previous kernel. I have "xsensors" installed, which reports the temperature of the Radeo graphics unit. In the latest 4.3.0-040300 kernel, when the DIS is "DynOff", the temperature is reported as "0 degrees C". It now reports the temperature only when DIS is on -- e.g., "DynPwr". Henry Baker Santa Barbara, CA At 03:07 AM 10/28/2015, Christopher M. Penalver 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 > >To manage notifications about this bug go to: >https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1509135/+subscriptions -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1509135/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
