[Bug 35138] New: Noisy fan with Toshiba L500 Laptop

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Mar 9 03:15:40 PST 2011


           Summary: Noisy fan with Toshiba L500 Laptop
           Product: xorg
           Version: 7.6
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: denisw at online.de
         QAContact: xorg-team at lists.x.org

Created an attachment (id=44266)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=44266)
The output of sensors-detect


I am using Debian unstable (Linux 2.6.37, xorg 7.6) on a Toshiba L500 laptop
-which has a built-in AMD Radeon HD 4650 graphics card - and am experiencing
serious fan noise with xf86-video-ati driver (6.14.0). The GPU fan seems
reasonably quiet when first starting the computer, but after a while of
moderate desktop usage, it suddenly spins up extremely - presumably to maximum
speed - and remains there until I reboot; the fan seems to never be spun down
by the operating system. With the propietary fglrx driver, however, fan speed
seems to be controlled properly, without sudden spin-ups and with spin-downs on
idleness. (But that driver has other problems and I would like to use a Free
Software driver.)

There seems to be a thermal control chip (i2c) for the Radeon card, and the
appropiate drivers seem to be loaded:

# lsmod | grep radeon
radeon                682777  2 
ttm                    44440  1 radeon
drm_kms_helper         22085  1 radeon
drm                   152653  4 radeon,ttm,drm_kms_helper
i2c_algo_bit            4105  1 radeon
i2c_core               16549  6
power_supply            7683  3 radeon,battery,ac

I have also run lm_sensor's sensors-detect tool, answering every probing
question with YES, but it only recommended me the "coretemp" driver (which I
have enabled, but as expected it did not change anything). I have attached the
output of sensors-detect if that helps.

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