kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

This bug was nominated against a series that is no longer supported, ie
quantal.  The bug task representing the quantal nomination is being
closed as Won't Fix.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu Quantal)
       Status: Fix Committed => Won't Fix

-- 
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/1079900

Title:
  nForce2 cpufreq driver does not load by default

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Quantal:
  Won't Fix
Status in “linux” source package in Raring:
  Fix Released

Bug description:
  == Quantal SRU Justification ==
  cpufreq-nforce2 is not autoloadable.  We built this in for past releases (eg Precise 12.04).  Reinstate this as built in rather than enabled as a module.

  == Test Case ==
  Boot a kernel with cpufreq-nforce2 driver enabled as a module and confirm the cpufreq-nforce2 doesn't load by default.  Because the cpufreq driver is not loaded, there is no /sys/devices/system/cpu/cpu0/cpufreq/ directory. This is used by CPU monitoring and/or scaling software to report or change CPU speed, governor etc. All software using this interface will fail unless the cpufreq driver is explicitly loaded post boot.

  Then boot a kernel with the cpufreq-nforce2 driver built in and
  confirm the described issues above are resolved.

  ----------

  nForce2 cpufreq driver does not load by default

  On upgrading to Quantal 12.10 from Precise 12.04.1 I noticed that the
  cpufreq nforce2 driver (cpufreq-nforce2) no longer loads at boot.

  The driver loads fine manually with modprobe or by adding an explicit
  /etc/default/loadcpufreq file. Once loaded all works as expected.

  Incidentally, trying to load it using kernel command line parameter
  cpufreq_driver=cpufreq-nforce2 fails. Is this a bug? Am I misusing it?
  Is it related to this problem?

  I also tried a clean install of Quantal to rule out upgrade jip. Same
  result.

  The last kernel published to updates on Precise before my upgrade was:
  % uname -a
  Linux NF7-S1 3.2.0-32-generic-pae #51-Ubuntu SMP Wed Sep 26 21:54:23 UTC 2012 i686 athlon i686 GNU/Linux

  which works as expected:

  % cpufreq-info
  cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
  Report errors and bugs to cpufreq@xxxxxxxxxxxxxxx, please.
  analyzing CPU 0:
    driver: nforce2
    CPUs which run at the same hardware frequency: 0
    CPUs which need to have their frequency coordinated by software: 0
    maximum transition latency: 0.00 ms.
    hardware limits: 1.46 GHz - 2.09 GHz
    available cpufreq governors: conservative, ondemand, userspace, powersave, performance
    current policy: frequency should be within 1.46 GHz and 2.09 GHz.
                    The governor "performance" may decide which speed to use
                    within this range.
    current CPU frequency is 2.09 GHz.

  The Quantal kernel is:
  % uname -a
  Linux NF7-S1 3.5.0-18-generic #29-Ubuntu SMP Fri Oct 19 10:27:31 UTC 2012 i686 athlon i686 GNU/Linux

  which doesn't load the nforce2 driver on boot.

  % cpufreq-info
  cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
  Report errors and bugs to cpufreq@xxxxxxxxxxxxxxx, please.
  analyzing CPU 0:
    no or unknown cpufreq driver is active on this CPU
    maximum transition latency: 0.00 ms.

  There has been some builtin / module shuffling since the 3.2.0 kernel wrt cpufreq. For 3.2.0:
  % ls /lib/modules/3.2.0-32-generic-pae/kernel/drivers/cpufreq

  p4-clockmod.ko
  pcc-cpufreq.ko

  For 3.5.0:
  % ls /lib/modules/3.5.0-18-generic/kernel/drivers/cpufreq/

  cpufreq-nforce2.ko
  gx-suspmod.ko
  longhaul.ko
  longrun.ko
  p4-clockmod.ko
  powernow-k6.ko
  powernow-k7.ko

  So, cpufreq-nforce2 was a builtin for the 3.2.0 kernel and is now a
  module. Coincidence? Looks suspicious.

  Consequences
  Because the cpufreq driver is not loaded, there is no /sys/devices/system/cpu/cpu0/cpufreq/ directory. This is used by CPU monitoring and/or scaling software to report or change CPU speed, governor et cetera. All s/w using this interface will fail unless the cpufreq driver is explicitly loaded post boot. I noticed the problem because my conky stopped working -- it references /sys/devices/system/cpu/cpu0/cpufreq/*. Once the driver is manually loaded, the conky works as expected.

  To reproduce
  This will require access to old metal. This bug report comes from an Abit NF7-S V2 with an AMD Athlon XP-M which has been running Ubuntu since Lucid without problem. I would expect any nForce2 chipset motherboard to reproduce this bug.

  There is a similar bug (fix released) for the PCC cpufreq driver:
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1061126

  Thank you.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: linux-image-3.5.0-18-generic 3.5.0-18.29
  ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
  Uname: Linux 3.5.0-18-generic i686
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  p          1911 F.... pulseaudio
  Date: Fri Nov 16 21:47:57 2012
  HibernationDevice: RESUME=UUID=b3f266c2-a7bf-4448-87f7-ecbc65e1f22b
  InstallationDate: Installed on 2012-05-19 (180 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  MarkForUpload: True
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.5.0-18-generic root=UUID=1814a781-3e1c-468c-abff-8b99f9b8f6d9 ro rootdelay=50 vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-18-generic N/A
   linux-backports-modules-3.5.0-18-generic  N/A
   linux-firmware                            1.95
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to quantal on 2012-11-11 (5 days ago)
  dmi.bios.date: 11/22/2004
  dmi.bios.vendor: Phoenix Technologies, LTD
  dmi.bios.version: 6.00 PG
  dmi.board.name: NF7-S/NF7,NF7-V (nVidia-nForce2)
  dmi.board.vendor: http://www.abit.com.tw/
  dmi.board.version: 2.X,1.0
  dmi.chassis.type: 3
  dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd11/22/2004:svn:pn:pvr:rvnhttp//www.abit.com.tw/:rnNF7-S/NF7,NF7-V(nVidia-nForce2):rvr2.X,1.0:cvn:ct3:cvr:

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1079900/+subscriptions