[Bug 30922] New: [radeon] Noisy fan with Radeon R600 and Toshiba Satellite L500-164

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=30922

           Summary: [radeon] Noisy fan with Radeon R600 and Toshiba
                    Satellite L500-164
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.38-rc8 (at least since 2.6.35)
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri at kernel-bugs.osdl.org
        ReportedBy: denisw at online.de
        Regression: No


When I use my Toshiba Satellite L500-164 laptop (AMD/ATI Radeon HD 4650) with
the radeon KMS driver, the GPU fan spins up very quickly (and loudly) after
booting and makes no attempt at spinning down subsequently (I need to fully
reboot for this to happen). The resulting noise makes the driver unusable for
me currently, which is unfortunate as it works perfectly otherwise.

I have tested this with every kernel version since I have this laptop, that is,
2.6.35, 2.6.36, 2.6.37 (different distributions each), and 2.6.38-rc8 mainline.

I don't know if it is helpful in any way, but I have looked to see if the
machine has any external thermal sensors attached to the GPU (using lm_sensors
and by looking into sysfs), but only the Intel Core sensors (coretemp) have
been found. I assume that means that the GPU has an internal thermal sensor,
but I don't know.

With the propietary fglrx driver, fan speed control works just fine.

If you need any further information, just ask.

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