http://bugzilla.kernel.org/show_bug.cgi?id=6980
------- Additional Comments From [EMAIL PROTECTED] 2006-09-01 11:43 -------
This looks like a bug in the DSDT. The _BST method is
declared "NotSerialized", yet it creates a namespace object (STAT) AND it
performs blocking I/O operations on the Embedded Controller that will
relinquish the interpreter. A second thread that attempts to reenter the
method at this time (during EC I/O) will fail, in unpredictable (timing-
dependent) ways.
Method (_BST, 0, NotSerialized)
{
Name (STAT, Package (0x04)
{
0x01,
0x00,
0x0F28,
0x39D0
})
... /* EC operations to get battery status */
Return (STAT)
}
Changing the declaration above to:
Method (_BST, 0, Serialized)
Fixes the problem here.
You can either fix the DSDT and override the BIOS version, or set the
serialized flag in the Linux configuration, I think it's like this:
acpi_serialize = TRUE
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