** Description changed: + == 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 cpuf...@vger.kernel.org, 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. - + 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 cpuf...@vger.kernel.org, please. analyzing CPU 0: - no or unknown cpufreq driver is active on this CPU - maximum transition latency: 0.00 ms. - + 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 + 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 + 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 + 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:
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1079900 Title: nForce2 cpufreq driver does not load by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1079900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
