kernel-packages team mailing list archive

[Andy Whitcroft <apw@xxxxxxxxxxxxx>]

@Michael -- the fix you propose for the issue was applied to 14.04 in
the upstream stable update v3.13.3, the commit below:

  commit 318729d307dc565a1c44bb02a8710b5a4f0b4037
  Author: Alex Deucher <alexander.deucher@xxxxxxx>
  Date:   Sat Jan 11 10:55:55 2014 -0500

    drm/radeon: disable dpm on BTC
    
    commit 919cf555c04e16dafb1fba56904eb23889a812c3 upstream.

That commit (and v3.13.3 in general) are contained in the Ubuntu
3.13.0-10.30 upload, which would imply that fix was in the kernel in the
-release pocket, in Ubuntu 3.13.0-24.46, and it cirtainly seems to be
correctly applied there.

That said it does appear some other fixes have been applied in this area
which may well have reenabled it for some of these cards.  It appears
some further investigation is needed, to determine why the fixes for
this have not worked and to feed this back to stable.

-- 
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https://bugs.launchpad.net/bugs/1297464

Title:
  1002:6739 14.04 randomly reboots

Status in “linux” package in Ubuntu:
  Triaged
Status in “linux” source package in Trusty:
  New

Bug description:
  I've noticed after installing Ubuntu 14.04 on my computer, that a DPM
  issue exists. DPM needs to be disabled by default like in kernel 3.14
  so that the live CD or desktop session does not instantly reboot the
  machine.

  WORKAROUND: Edit grub.cfg on the bootable flash drive and adding
  radeon.dpm=0 to the boot options, along with cd'ing to
  /target/etc/default and editing grub with the same change before
  rebooting after installation to bypass it.

  ---
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     2789 F.... pulseaudio
   /dev/snd/controlC1:  ubuntu     2789 F.... pulseaudio
  CasperVersion: 1.340
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  IwConfig:
   eth0      no wireless extensions.

   lo        no wireless extensions.
  LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: System manufacturer System Product Name
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz.efi root=UUID=E3B4-EDF6 debian-installer/language=en keyboard-configuration/layoutcode=us iso-scan/filename=/username-14.04-desktop-amd64.iso boot=casper file=/cdrom/preseed/username.seed noprompt quiet splash radeon.dpm=0 --
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  RfKill:

  Tags:  trusty
  Uname: Linux 3.13.0-24-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 06/17/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2102
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: M4A79XTD EVO
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev X.0X
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2102:bd06/17/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A79XTDEVO:rvrRevX.0X:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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