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Thread: CPU runs at 95 degrees C

  1. #1
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    CPU runs at 95 degrees C

    Is there a way to undervolt or slow down the cpus bus so that I don't harm my laptop? I have a l Core2 duo Intel 2.17 g. cpu with a single fan and running O/S Ubuntu Precise 12.04 LTS. I spend hours at the laptop sometimes and like this minute, the temperature therefore has the stress of just Chromium. Even if I could adjust the browser to run at 16bit could that help?
    Last edited by acodea; October 28th, 2013 at 01:14 AM.

  2. #2
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    Re: CPU runs at 95 degrees C

    95C will shorten the life of the CPU. Shutdown will happen at 100 or 110C. Your machine should probably run at 70C with maximum load. I would suspect you have a loose heatsink or the heat paste is old and needs to be renewed. There is a way to undervolt Intel CPU's, but that won't help in this case. You have a mechanical problem that needs to be fixed right away.

    Undervolting causes the current to increase which can actually increase the temperature for certain workloads, so it is not recommended for this problem. Perhaps in the BIOS there is a way to declock (slow down) the processor. Also cpufreqd and a panel application that allows you to select the processor speed (to 800 MHz) would be needed to get enough reduction.
    Last edited by tgalati4; October 28th, 2013 at 12:16 AM.
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  3. #3
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    Re: CPU runs at 95 degrees C

    Also cpufreqd and a panel application that allows you to select the processor speed (to 800 MHz) would be needed to get enough reduction.
    !
    I have installed cpufreqd and am looking in to building a gui. There is just so little in the way of programs I can use for this distro. Somehow, 12.04 has been slipped past on this subject without taking a chance on your own coding and (decoding) skills.

    These outputs doesn't show anything suggesting what I may use to control cpu freq as cpufreqd install did hint at.

    $ cpufreq-info
    cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
    Report errors and bugs to cpufreq@vger.kernel.org, please.
    analyzing CPU 0:
    driver: acpi-cpufreq
    CPUs which run at the same hardware frequency: 0 1
    CPUs which need to have their frequency coordinated by software: 0
    maximum transition latency: 10.0 us.
    hardware limits: 1000 MHz - 2.17 GHz
    available frequency steps: 2.17 GHz, 1.67 GHz, 1.33 GHz, 1000 MHz
    available cpufreq governors: conservative, ondemand, userspace, powersave, performance
    current policy: frequency should be within 2.17 GHz and 2.17 GHz.
    The governor "performance" may decide which speed to use
    within this range.
    current CPU frequency is 2.17 GHz.
    cpufreq stats: 2.17 GHz:92.37%, 1.67 GHz:7.51%, 1.33 GHz:0.01%, 1000 MHz:0.11% (82)
    analyzing CPU 1:
    driver: acpi-cpufreq
    CPUs which run at the same hardware frequency: 0 1
    CPUs which need to have their frequency coordinated by software: 1
    maximum transition latency: 10.0 us.
    hardware limits: 1000 MHz - 2.17 GHz
    available frequency steps: 2.17 GHz, 1.67 GHz, 1.33 GHz, 1000 MHz
    available cpufreq governors: conservative, ondemand, userspace, powersave, performance
    current policy: frequency should be within 2.17 GHz and 2.17 GHz.
    The governor "performance" may decide which speed to use
    within this range.
    current CPU frequency is 2.17 GHz.
    cpufreq stats: 2.17 GHz:92.47%, 1.67 GHz:7.50%, 1.33 GHz:0.00%, 1000 MHz:0.03% (55)
    -----------------------------------------------------------------------------------------------------------------------------------------------------------
    $ pstree
    init-+-NetworkManager-+-dhclient
    | |-dnsmasq
    | `-2*[{NetworkManager}]
    |-accounts-daemon---{accounts-daemon}
    |-acpid
    |-and
    |-atd
    |-atop
    |-avahi-daemon---avahi-daemon
    |-bluetoothd
    |-chromium-browse-+-chromium-browse
    | |-chromium-browse---chromium-browse---chromium-browse---+
    | |-chromium-browse---5*[{chromium-browse}]
    | `-32*[{chromium-browse}]
    |-clamd---{clamd}
    |-colord---2*[{colord}]
    |-console-kit-dae---64*[{console-kit-dae}]
    |-cpufreqd---{cpufreqd}
    |-cron
    |-cupsd
    |-3*[dbus-daemon]
    |-2*[dbus-launch]
    |-2*[dconf-service---2*[{dconf-*********]]
    |-e-addressbook-f---2*[{e-addressbook-f}]
    |-freshclam
    |-2*[gconfd-2]
    |-geoclue-master
    |-6*[getty]
    |-gnome-keyring-d---8*[{gnome-keyring-d}]
    |-gnome-shell-cal---2*[{gnome-shell-cal}]
    |-gnome-terminal-+-bash---pstree
    | |-gnome-pty-helpe
    | `-4*[{gnome-terminal}]
    |-goa-daemon---{goa-daemon}
    |-gsd-printer---{gsd-printer}
    |-gvfs-afc-volume---{gvfs-afc-volume}
    |-2*[gvfs-fuse-daemo---3*[{gvfs-fuse-daemo}]]
    |-gvfs-gdu-volume
    |-gvfs-gphoto2-vo
    |-2*[gvfsd]
    |-gvfsd-burn
    |-gvfsd-http---2*[{gvfsd-http}]
    |-gvfsd-metadata
    |-gvfsd-trash
    |-hddtemp
    |-irqbalance
    |-lightdm-+-Xorg---2*[{Xorg}]
    | |-lightdm-+-gnome-session-+-deja-dup-monito---2*[{deja-dup-monit+
    | | | |-gdu-notificatio---2*[{gdu-notificati+
    | | | |-gnome-screensav---2*[{gnome-screensa+
    | | | |-gnome-settings--+-syndaemon
    | | | | `-3*[{gnome-settings+
    | | | |-gnome-shell---5*[{gnome-shell}]
    | | | |-indicator-multi---2*[{indicator-mult+
    | | | |-nautilus---2*[{nautilus}]
    | | | |-nm-applet---2*[{nm-applet}]
    | | | |-psensor---3*[{psensor}]
    | | | |-ssh-agent
    | | | |-synapse---2*[{synapse}]
    | | | |-update-notifier---2*[{update-notifie+
    | | | |-vino-server---2*[{vino-server}]
    | | | `-3*[{gnome-session}]
    | | `-{lightdm}
    | `-2*[{lightdm}]
    |-master-+-pickup
    | `-qmgr
    |-mission-control---2*[{mission-control}]
    |-modem-manager
    |-3*[mount.ntfs]
    |-mousetweaks---2*[{mousetweaks}]
    |-polkitd---{polkitd}
    |-pulseaudio-+-gconf-helper
    | `-2*[{pulseaudio}]
    |-rsyslogd---3*[{rsyslogd}]
    |-rtkit-daemon---2*[{rtkit-daemon}]
    |-timidity
    |-ubuntu-geoip-pr---2*[{ubuntu-geoip-pr}]
    |-ubuntuone-syncd---3*[{ubuntuone-syncd}]
    |-udevd---2*[udevd]
    |-udisks-daemon-+-udisks-daemon
    | `-2*[{udisks-daemon}]
    |-upowerd---2*[{upowerd}]
    |-upstart-socket-
    |-upstart-udev-br
    |-whoopsie---{whoopsie}
    |-zeitgeist-daemo---{zeitgeist-daemo}
    |-zeitgeist-datah---{zeitgeist-datah}
    `-zeitgeist-fts-+-cat
    `-{zeitgeist-fts}
    -----------------------------------------------------------------------------------------------------------------------------------------------------------
    Last edited by acodea; October 28th, 2013 at 01:21 AM.

  4. #4
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    Re: CPU runs at 95 degrees C

    There are several indicator/selectors for cpufreqd. Choose one that works with your environment.

    tgalati4@Mint14-Extensa ~ $ apt-cache search cpufreq
    mate-applets - Various applets for the MATE panel
    mate-applets-common - Various applets for the MATE panel (common files)
    collectd-core - statistics collection and monitoring daemon (core system)
    cpufreqd - fully configurable daemon for dynamic frequency and voltage scaling
    cpufrequtils - utilities to deal with the cpufreq Linux kernel feature
    gnome-applets - Various applets for the GNOME panel - binary files
    indicator-cpufreq - CPU frequency scaling indicator
    libcpufreq-dev - development files to deal with the cpufreq Linux kernel feature
    libcpufreq0 - shared library to deal with the cpufreq Linux kernel feature
    xfce4-cpufreq-plugin - cpufreq information plugin for the Xfce4 panel
    xfce4-goodies - enhancements for the Xfce4 Desktop Environment
    -------------------------------------
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  5. #5
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    Ubuntu 15.10 Wily Werewolf

    Re: CPU runs at 95 degrees C

    If your laptop is several years old you probably need to clean the fan. I found a tutorial online for my HP* and the fan was half chocked with fluff. Now it runs cool.
    * In my case you remove three screws underneath and then remove the keyboard to access the fan.

  6. #6
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    Re: CPU runs at 95 degrees C

    The governor "performance" may decide which speed to use
    That's not what you want:
    Code:
    sudo cpufreq-set -g ondemand
    Also, you want to make sure 3D is working properly for Unity, so the CPU isn't being used for graphics accel:
    Code:
    /usr/lib/nux/unity_support_test -p

  7. #7
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    Re: CPU runs at 95 degrees C

    Quote Originally Posted by Temüjin View Post
    That's not what you want:
    Code:
    sudo cpufreq-set -g ondemand
    Also, you want to make sure 3D is working properly for Unity, so the CPU isn't being used for graphics accel:
    Code:
    /usr/lib/nux/unity_support_test -p
    I checked to make sure that hasn't changed.

    The cpufreq GUI reset whenever I used it. I still use the gui, and it shows the cpufreq setting took.
    Code:
    sudo cpufreq-set -g ondemand
    Code:
    /usr/lib/nux/unity_support_test -p
    [/QUOTE]

    PHP Code:
    Not software rendered:    yes
    Not blacklisted
    :          yes
    GLX fbconfig
    :             yes
    GLX texture from pixmap
    :  yes
    GL npot 
    or rect texturesyes
    GL vertex program
    :        yes
    GL fragment program
    :      yes
    GL vertex buffer object
    :  yes
    GL framebuffer object
    :    yes
    GL version is 1.4
    +:       yes


    Unity 3D supported
    :       yes 
    Last edited by acodea; October 28th, 2013 at 05:03 PM. Reason: c, ch, ch, changes

  8. #8
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    Re: CPU runs at 95 degrees C

    Quote Originally Posted by tgalati4 View Post
    There are several indicator/selectors for cpufreqd. Choose one that works with your environment.

    tgalati4@Mint14-Extensa ~
    Code:
    $ apt-cache search cpufreq
    mate-applets - Various applets for the MATE panel
    mate-applets-common - Various applets for the MATE panel (common files)
    collectd-core - statistics collection and monitoring daemon (core system)
    cpufreqd - fully configurable daemon for dynamic frequency and voltage scaling
    cpufrequtils - utilities to deal with the cpufreq Linux kernel feature
    gnome-applets - Various applets for the GNOME panel - binary files
    indicator-cpufreq - CPU frequency scaling indicator
    libcpufreq-dev - development files to deal with the cpufreq Linux kernel feature
    libcpufreq0 - shared library to deal with the cpufreq Linux kernel feature
    xfce4-cpufreq-plugin - cpufreq information plugin for the Xfce4 panel
    xfce4-goodies - enhancements for the Xfce4 Desktop Environment
    'Tis a good list and the day is young
    https://wiki.ubuntu.com/5-A-Day

    This was placed here to ignore

  9. #9
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    Re: CPU runs at 95 degrees C

    Well, check to see what's using the CPU when it gets that hot:
    Code:
    sudo apt-get install htop
    htop
    If nothing is pegging the CPU, then you may be looking at the wrong sensor output, or the sensor's output may be suspect (or as others have suggested, it may be a dust or heatsink issue).

  10. #10
    Join Date
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    Re: CPU runs at 95 degrees C

    Quote Originally Posted by Temüjin View Post
    Well, check to see what's using the CPU when it gets that hot:
    Code:
    sudo apt-get install htop
    htop
    If nothing is pegging the CPU, then you may be looking at the wrong sensor output, or the sensor's output may be suspect (or as others have suggested, it may be a dust or heatsink issue).

    Why is chromium and all browsers running as root? This was the first question I ask. Why is something like this close to the internet running with privileges elevated?
    https://wiki.ubuntu.com/5-A-Day

    This was placed here to ignore

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