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Thread: Lenovo G550 Overheating

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  1. #1
    Join Date
    Dec 2009
    Buenos Aires, Argentina
    Ubuntu 12.04 Precise Pangolin

    Lenovo G550 Overheating

    OK, so I' ve read a few posts here and none of them led to an useful solution. System is up to date, running Lucid Lynx 10.04 32-bits. As far as I could guess, it might be related to outdated graphic drivers + not applying silicone heat sink compound after cleaning. However, I don' t think that will lower it to normal values. I' ve cleaned it almost performing a complete disassemble of it around a month ago and I' m about to apply silicone.

    Relevant code outputs are as follows:

    Linux ivan-ub 2.6.32-45-generic #99-Ubuntu SMP Tue Oct 16 16:31:11 UTC 2012 i686 GNU/Linux
    Graphic card driver (outdated, search my other posts if you know how to help me with my other current questions):
    00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 09)
    grep cooling and grep acpi (lsmod | grep fan gives no answer):
    $ dmesg | grep cooling
    [    0.380471] processor LNXCPU:00: registered as cooling_device0
    [    0.386456] processor LNXCPU:01: registered as cooling_device1
    [   16.611604] acpi device:07: registered as cooling_device2
    $ dmesg | grep acpi
    [    0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
    [    0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
    [    0.000000] ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
    [    0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
    [   16.611604] acpi device:07: registered as cooling_device2
    Solution found so far: open main back cover and place a 60cm. diameter air circulator around 1 m. away from laptop, inclination of about 15, maybe 35 degrees.

    After it stopped converting some files and an hour with fan on, temp lowered to 36-ish °C, being initial CPU-cores temp around 102-109 (Being critical 119°, so it was pretty bad).

    Hard Disk Drive Temperature was at all times between 37 and 41 Celsius after and during heavy Hard Disk Drive use respectively, don' t know critical values, but I believe they are around 60-70, maybe 75.

    Temp log
    (Written by me as a description, if needed, to provide further details)

    Conditions: outside temperature is around 20°C late in the evening so temp' s gonna drop a bit more. Relative Humidity 73%. Window a bit open, wind direction and speed West - Northwest / 5.6 km/h.

    Applications currently opened: chromium-browser with 18 tabs opened, including flash-dependant ones (and maybe java as well); one terminal window with one tab in use and a file browser window. Only current activity I' m doing is writing on this post. Temp2 already on 46 celsius and graphic is in red. I believe is graphic card - which by the way it is an onboard Intel GM45 graphics card with outdated drivers. Fan is still off. Lowering laptop inclination to 0° (back cover still off, temperature is stable). Switched tabs, fan kicked in at low speed. Trying YT HD video (yeah, I'm an a-hole). Playing at 720p. Fan went to mid-speed 2 seconds after it started. Fan' s running a bit faster at 0:17. Placing back-cover again. Well, it seems that temperature is still stable at around 46°C. Copying some files. Temperature on hardware monitor remains the same as per dialogue box opened but it rose to 55°C on terminal (using sensors command). Fan speed raising (Duh!). HDD temp rose to 43°C. Operation ended.

    Note for you guys about temp log written: I don' t think sensors installing sensors monitor is helping reduce heat? Will check how temp is when normal using is done and update you once you suggest me to do something about this.

    Hope you can help. Shall I inform you any other output, just let me know. Thanks in advanced.

    PS: sorry for the long post. I' m trying to give as much information as I can.
    Last edited by ivotkl; December 1st, 2012 at 06:47 AM. Reason: Forgot to add driver information.
    Using Ubuntu since 9.04, loving it since 2010. Still trying to fully understand it. My boxes' HW specs

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