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Bug#584187: linux-image-powerpc64: windfarm drivers fail to be loaded on boot

Package: linux-image-powerpc64
Version: 2.6.32+25
Severity: normal

When this host boots, it requires the 'windfarm_pm112' driver loaded,
otherwise the fans turn on at full speed and don't turn off.

If I manually run:

    $ sudo modprobe windfarm_pm112

the fans immediately cycle down to a normal operating speed and stay

This is a regression; for the past several years the fans would be
controlled properly on boot. It was only when rebooting a few weeks
ago that this problem became apparent.

I don't know whether this is a problem with the kernel package, or
which specific upgrade introduced the regression, but it's related to
detecting whether the drivers need to be loaded automatically. Perhaps
udev? How would I diagnose the change further?

-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (990, 'testing'), (900, 'stable')
Architecture: powerpc (ppc64)

Kernel: Linux 2.6.32-3-powerpc64 (SMP w/2 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_AU.UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages linux-image-powerpc64 depends on:
ii  linux-image-2.6.32-3-powerpc6 2.6.32-9   Linux 2.6.32 for 64-bit PowerPC

linux-image-powerpc64 recommends no packages.

linux-image-powerpc64 suggests no packages.

-- no debconf information

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