Chascon, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags: kernel-fixed-upstream kernel-fixed-upstream-VERSION-NUMBER
where VERSION-NUMBER is the version number of the kernel you tested. For example: kernel-fixed-upstream-v3.11 This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag: needs-upstream-testing If the mainline kernel does not fix this bug, please add the following tags: kernel-bug-exists-upstream kernel-bug-exists-upstream-VERSION-NUMBER As well, please remove the tag: needs-upstream-testing Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding. ** Tags removed: apple macbook pro ** Tags added: needs-bisect needs-upstream-testing regression-release ** Tags added: latest-bios-mbp11.88z.0055.b08.0610121325 ** Attachment removed: "version.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1222112/+attachment/3807318/+files/version.log ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1222112 Title: coretemp: Errata AE18 not fixed, update BIOS or microcode of the CPU! Status in “linux” package in Ubuntu: Incomplete Bug description: 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. --- 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. 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