https://bugzilla.kernel.org/show_bug.cgi?id=15605
Summary: \_SB_ is not the only root-level namespace device -
introduced by commit 78b8e141
Product: ACPI
Version: 2.5
Kernel Version: 2.6.32-rc1 and later
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: BIOS
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Regression: Yes
Created an attachment (id=25636)
--> (https://bugzilla.kernel.org/attachment.cgi?id=25636)
DSDT that has device AMW0 as a root-level namespace device
In commit 78b8e141, we assume all the root-level namespace devices are \_SB
devices. But this is not true.
Here is part of the output of "grep . /sys/bus/acpi/devices/*/path" in 2.6.33
/sys/bus/acpi/devices/LNXSYSTM:00/LNXSYBUS:00/path:\_SB_
/sys/bus/acpi/devices/LNXSYSTM:00/LNXSYBUS:01/path:\AMW0
and here is the output of "grep . /sys/bus/acpi/drivers/wmi/*/path" in 2.6.31
/sys/bus/acpi/drivers/wmi/PNP0C14:00/path:\AMW0
device \AMW0 is renamed and the ACPI wmi driver is not bind to it any more.
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