On Fri, 28 Oct 2011, Alexander Bruy wrote:
> Few days ago I found this thread [2] in mailing list, seems
> thinkpad_acpi now has experimental SL series support. I tried to load
> thinkpad_acpi module on my laptop and get next output in
> /var/log/messages

No extra support for the SL-series was added to thinkpad-acpi.  What
happened is that Lenovo added known ThinkPad firmware APIs to the
SL-series firmware, and the driver started working on limited mode on SL
thinkpads with the newer firmware.

So, if your SL-500 is not using the latest firmware, try to upgrade it.
It might help.

> thinkpad_acpi: ThinkPad BIOS 6AET58WW, EC unknown

That looks like an SL firmware *without* the APIs thinkpad-acpi uses, so
it won't work.  Either update to a firmware which has those APIs (if one
is available), or you'll have to use a different driver.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

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