acpi_smbus_read_2: AE_ERROR 0x10 on a Mac Pro running -STABLE

George Hartzell hartzell at
Sun Jul 15 23:25:45 UTC 2007

Nate Lawson writes:
 > George Hartzell wrote:
 > > Hi,
 > > 
 > > I have an 8-way Mac Pro running -STABLE csup'ed a few weeks ago.  It's
 > > generally working great, but
 > > 
 > >    acpi_smbus_read_2: AE_ERROR 0x10
 > > 
 > > pops up on the console several times per minute.  It doesn't seem to
 > > hurt anything, but it fills up the dmesg buffer and just doesn't seem
 > > right.
 > > 
 > > Does it ring any bells?  What add'l info can I provide that might help
 > > shut it up?
 > It's the acpi_smbat device (smart battery).  For some reason, your
 > system is reporting an error when it reads the battery status every 10
 > seconds or so.
 > I don't know much about the SMbus status codes.  You could start by
 > posting your dmesg (AE_ERROR messages trimmed for size).

I've put dmesg -v, dmesg, sysctl hw.acpi, and acpidump -dt output at:

The top of the dmesg -v output seems to have scrolled out of the

Thanks for taking a look at this.


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