** Description changed: Symptoms: Excessive fan use. Ran fine with Ubuntu Natty Narwhal, but successive upgrades resulted in both fans running full shortly after bootup (regression). I justified it thinking that Ubuntu had higher requirements, until infrequent failed attempts to boot finally resulted in the on-screen posting of "coretemp: Errata AE18 not fixed, update BIOS or microcode of the CPU!" on Raring. Now on Saucy, although without any failed boots, I find the same error by checking dmesg: dmesg | grep coretemp [ 47.314949] coretemp: Errata AE18 not fixed, update BIOS or microcode of the CPU! [ 47.314958] coretemp: Errata AE18 not fixed, update BIOS or microcode of the CPU! sudo lsmod | grep coretemp outputs coretemp 13195 0 sudo sensors -s gives no output at the moment. I do have the coretemp listed to be loaded: cat /etc/modules # /etc/modules: kernel modules to load at boot time. # # This file contains the names of kernel modules that should be loaded # at boot time, one per line. Lines beginning with "#" are ignored. lp #speedstep_centrino # kernel's job now, cpu frequency scaling #acpi_cpufreq # kernel's job now, cpu frequency scaling cpufreq_ondemand #responsive, cpu frequency scaling #cpufreq_conservative # slow, cpu frequency scaling ## Chip drivers , as per lm-sensors, sudo sensors-detect, and Psensor #coretemp lm63 ## Used by macfanctld from https://launchpad.net/~mactel-support/+archive/ppa applesmc coretemp Comments & observations I do know Errata is code for defective firmware and that this has been dealt with prior http://lkml.org/lkml/2007/6/16/173 (thus this is a regression) and that I'm not alone: https://bbs.archlinux.org/viewtopic.php?id=143492 http://ww.ubuntuforums.org/showthread.php?t=814314 Interestingly, http://ubuntuforums.org/showthread.php?t=1239544 mentions in passing " Intel's microcode update", which I find isn't applicable considering that my fans ran fine on Natty. I find the other suggestion, "put the following into /etc/rc.local" disconcerting considering that software is supposed to accommodate defective microcode and regularly does, but also that half a decade has come and gone with this issue. Still, it seems most plausible that the pertinent microcode is not loaded before the coretemp module jumps into action. WORKAROUND: add in /etc/rc.local : modprobe coretemp + and install + intel-microcode + --- ApportVersion: 2.12.1-0ubuntu3 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: mo 3726 F.... pulseaudio /dev/snd/controlC0: mo 3554 F.... volumeicon mo 3726 F.... pulseaudio DistroRelease: Ubuntu 13.10 HibernationDevice: RESUME=UUID=971dcaf3-f640-4d1c-9cb6-ea8eba0cab54 InstallationDate: Installed on 2011-09-05 (733 days ago) InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1) MachineType: Apple Computer, Inc. MacBookPro1,1 MarkForUpload: True Package: linux (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-4-generic root=UUID=9c44e3b1-d6d1-4ca7-a621-c0142ded125a ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.11.0-4.9-generic 3.11.0-rc7 RelatedPackageVersions: linux-restricted-modules-3.11.0-4-generic N/A linux-backports-modules-3.11.0-4-generic N/A linux-firmware 1.113 StagingDrivers: zram Tags: saucy staging Uname: Linux 3.11.0-4-generic i686 UpgradeStatus: Upgraded to saucy on 2013-09-01 (6 days ago) UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare dmi.bios.date: 10/12/06 dmi.bios.vendor: Apple Computer, Inc. dmi.bios.version: MBP11.88Z.0055.B08.0610121325 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: Mac-F425BEC8 dmi.board.vendor: Apple Computer, Inc. dmi.board.version: PVT dmi.chassis.asset.tag: Asset Tag dmi.chassis.type: 8 dmi.chassis.vendor: Apple Computer, Inc. dmi.chassis.version: Mac-F425BEC8 dmi.modalias: dmi:bvnAppleComputer,Inc.:bvrMBP11.88Z.0055.B08.0610121325:bd10/12/06:svnAppleComputer,Inc.:pnMacBookPro1,1:pvr1.0:rvnAppleComputer,Inc.:rnMac-F425BEC8:rvrPVT:cvnAppleComputer,Inc.:ct8:cvrMac-F425BEC8: dmi.product.name: MacBookPro1,1 dmi.product.version: 1.0 dmi.sys.vendor: Apple Computer, Inc.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1222112 Title: coretemp: Errata AE18 not fixed, update BIOS or microcode of the CPU! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1222112/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
