The overheating is probably due to the fact that you have a ATI Technologies Inc M92 [Mobility Radeon HD 4500 Series] graphics chip. ATI/AMD graphics have historically had only limited power management support under Linux. The good news is that better power management has of ATI/AMD graphics has now arrived!
Better power management for AMD/ATI Radeon R600 and newer hardware was introduced in the 3.11 linux kernel and refined in the 3.12 kernel. A PPA of the 3.12.6 kernel is available at http://kernel.ubuntu.com /~kernel-ppa/mainline/ and instructions on how to install and uninstall it are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds To use this power management for the AMD/ATI Radeon you will need to select it at boot by adding radeon.dpm=1 to your GRUB kernel boot options as described at https://help.ubuntu.com/community/Grub2/Troubleshooting#Editing_the_GRUB_2_Menu_During_Boot If you have R700 or newer hardware (other than APUs) you will also need to install the latest AMD graphics microcode (ucode) files to /lib/firmware/radeon These are available at http://people.freedesktop.org/~agd5f/radeon_ucode/ Get the version ending in "smc". R700 basically means Radeon HD 4000 series and newer. However note that according to Wikipedia and http://xorg.freedesktop.org/wiki/RadeonFeature/#index5h2 the Mobility Radeon HD 4225/4250 is a RV620 chip, so anyone with one of those shouldn't need the updated firmware files. Ubuntu 13.10 "Saucy Salamander" is based on the 3.11 kernel and includes the updated AMD smc firmware. See the blog post at http://www.botchco.com/agd5f/?p=57 for further information. Unlike the older dynpm method, the new DPM method works with multiple monitors and there shouldn't be any flickering as the performance level changes are handled by dedicated hardware rather than the driver. The currently under-development 3.13 upstream kernel enables DPM by default (without needing the radeon.dpm=1 boot parameter I mentioned above) for Radeon HD 4000 through Radeon HD 7000 series graphics processors but with some specific ASICs being excluded. Also make sure you have removed all dust from inside the computer, particulary from the CPU and GPU fans and heatsinks (on a laptop at the very least run a vacuum cleaner nozzle along the external air vents). You can also put the edge of a book under the back edge of your laptop so that it is raised off the desk at a slight angle, or purchase a laptop cooling pad (with USB powered fans) to sit the laptop on. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-power-manager in Ubuntu. https://bugs.launchpad.net/bugs/864660 Title: computer over heat,and auto restart after 11.04 Status in “gnome-power-manager” package in Ubuntu: Incomplete Bug description: fans works not properly,and cause my book over heat,it turns slower when start ubuntu than grub boot select stage,and also slower than log into windows 7. ProblemType: Bug DistroRelease: Ubuntu 11.04 Package: gnome-power-manager 2.32.0-2ubuntu2.1 ProcVersionSignature: Ubuntu 2.6.38-11.50-generic 2.6.38.8 Uname: Linux 2.6.38-11-generic i686 Architecture: i386 CheckboxSubmission: 5999bce6c3f5385199327662324fbfc2 CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f Date: Sun Oct 2 22:46:49 2011 ExecutablePath: /usr/bin/gnome-power-manager GnomeSessionIdleInhibited: No GnomeSessionInhibitors: None GnomeSessionSuspendInhibited: No InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007) MachineType: LENOVO 0578MDC ProcEnviron: LANGUAGE=en_US:en LANG=en_US.utf8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic root=UUID=99228a9b-596f-4067-a022-0fa40cf05b15 ro quiet splash vt.handoff=7 SourcePackage: gnome-power-manager UpgradeStatus: Upgraded to natty on 2011-04-29 (156 days ago) XsessionErrors: (google-chrome:5192): GdkPixbuf-CRITICAL **: gdk_pixbuf_new_from_data: assertion `width > 0' failed (google-chrome:5192): GdkPixbuf-CRITICAL **: gdk_pixbuf_new_from_data: assertion `width > 0' failed dmi.bios.date: 10/14/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 80ET42WW (1.19 ) dmi.board.name: 0578MDC 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:bvr80ET42WW(1.19):bd10/14/2010:svnLENOVO:pn0578MDC:pvrThinkPadEdge:rvnLENOVO:rn0578MDC:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 0578MDC dmi.product.version: ThinkPad Edge dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/864660/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
