acpi_ibm fails to work on new laptop

[Ian Smith]

On Mon, 11 Jul 2011 16:34:43 -0700, Kevin Oberman wrote:

 > I recently went from a ThinkPad T43 to a T520. On the T520, ac[i_ibm
 > is not functional. 'sysctl dev.acpi_ibm'
 > returns nothing. No volume control, though MUTE does work.

Is the module actually loading?  If so, verbose dmesg shpuld say like
  Preloaded elf module "/boot/kernel/acpi_ibm.ko" at 0xc103b2e0
and presumably whinge if it failed to load?

 > Any idea about a fix? Can I just change the OEMID to LENOVO? (Probably
 > should change all "IBM references to LENOVO while I'm at it.)
 > I'll probably give this a shot, just to see if it works.

Change where?  No OEMID in /sys/dev/acpi_support/acpi_ibm.c at 8.2-R.

cheers, Ian