@James, I've now packaged up thermald for Trusty, which will do auto throttling if the CPU is too hot. Perhaps you can give that a spin.
-- 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/955287 Title: Ubuntu should handle "hot" CPUs by taking preemptive action and warning users Status in “linux” package in Ubuntu: Incomplete Bug description: If the kernel detects your CPU(s) is/are too hot currently (see bug 751689), the kernel calls /sbin/poweroff. This will provide a "graceful" system shutdown. If /sbin/poweroff fails, the kernel just forcibly shuts the system down. However, both strategies are last resorts and are called when the system temperature has reached a critical level. However, the kernel seems to emit an ACPI event when it detects the CPU(s) are merely "hot". I suggest we consider adding an acpi hook to attempt to avoid a "critical" scenario. Currently, the user experience when "critical" gets hit is not good - the system just shuts down with no warning whatsoever. This is alarming in the extreme to users. Ideas: - proactively attempt to kill off power hogging processes (use powertop?) - ramp fans to maximum and present the user with a warning window explaining what is happening. - present the user with a window of high-power processes and ask *them* to select the processes they'd like to kill off in an effort to avoid a system shutdown. Problems: - it is unclear (to me atleast) how close (in terms of degrees centigrade) "hot" and "critical" are (is it different for all CPUs ?) As such, it is unclear how long (time) it might take for a system that is hot to go critical and just shutdown. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: acpi-support 0.140 ProcVersionSignature: Ubuntu 3.2.0-18.29-generic-pae 3.2.9 Uname: Linux 3.2.0-18-generic-pae i686 NonfreeKernelModules: nvidia ApportVersion: 1.94.1-0ubuntu2 Architecture: i386 Date: Wed Mar 14 17:22:09 2012 InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007) ProcEnviron: TERM=xterm PATH=(custom, user) LANG=fr_CA.UTF8 SHELL=/bin/bash SourcePackage: acpi-support UpgradeStatus: Upgraded to precise on 2012-01-12 (62 days ago) --- AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.94.1-0ubuntu2 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: james 3788 F.... pulseaudio /dev/snd/controlC0: james 3788 F.... pulseaudio james 10267 F.... alsamixer Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf2420000 irq 45' Mixer name : 'Conexant CX20585' Components : 'HDA:14f15069,17aa214c,00100302 HDA:14f12c06,17aa2122,00100000' Controls : 9 Simple ctrls : 6 Card1.Amixer.info: Card hw:1 'NVidia'/'HDA NVidia at 0xcdefc000 irq 16' Mixer name : 'Nvidia GPU 0b HDMI/DP' Components : 'HDA:10de000b,10de0101,00100100' Controls : 24 Simple ctrls : 4 Card29.Amixer.info: Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 6IHT37WW-1.12' Mixer name : 'ThinkPad EC 6IHT37WW-1.12' Components : '' Controls : 1 Simple ctrls : 1 Card29.Amixer.values: Simple mixer control 'Console',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] DistroRelease: Ubuntu 12.04 HibernationDevice: RESUME=UUID=67e3cd44-242b-4bbf-918b-28fff81e0312 InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007) MachineType: LENOVO 2516CTO NonfreeKernelModules: nvidia Package: linux (not installed) ProcEnviron: TERM=xterm PATH=(custom, user) LANG=fr_CA.UTF8 SHELL=/bin/bash ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-18-generic-pae root=UUID=7ad192e9-7b26-49d1-8e1c-fefc7dc495cb ro acpi_sleep=nonvs console=ttyUSB0,115200n8r console=tty quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.2.0-18.29-generic-pae 3.2.9 RelatedPackageVersions: linux-restricted-modules-3.2.0-18-generic-pae N/A linux-backports-modules-3.2.0-18-generic-pae N/A linux-firmware 1.71 StagingDrivers: mei Tags: precise staging Uname: Linux 3.2.0-18-generic-pae i686 UpgradeStatus: Upgraded to precise on 2012-01-12 (62 days ago) UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare sbuild dmi.bios.date: 08/27/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 6IET72WW (1.32 ) dmi.board.name: 2516CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr6IET72WW(1.32):bd08/27/2010:svnLENOVO:pn2516CTO:pvrThinkPadT410:rvnLENOVO:rn2516CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 2516CTO dmi.product.version: ThinkPad T410 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/955287/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
