** Changed in: hwe-next
Status: Incomplete => Triaged
** Changed in: hwe-next
Importance: High => Medium
** Changed in: linux (Ubuntu)
Importance: High => Medium
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https://bugs.launchpad.net/bugs/1118657
Title:
Lenovo m490/k4350/b580/L530/k29 - ACPI Warnings for
\_SB_.PCI0.LPCB.H_EC.LED_
Status in HWE Next Project:
Triaged
Status in “linux” package in Ubuntu:
Triaged
Status in “linux” source package in Precise:
Confirmed
Status in “linux” source package in Quantal:
Confirmed
Bug description:
Suspend and hibernate stress test got failed with following errors in logs:
s3: HIGH Kernel message: [10512.177806] ACPI Warning: For
\_SB_.PCI0.LPCB.H_EC.LED_: Excess arguments - needs 1, found 2
(20110623/nspredef-326)
s4: HIGH Kernel message: [11728.328110] ACPI Warning: For
\_SB_.PCI0.LPCB.H_EC.LED_: Excess arguments - needs 1, found 2
(20110623/nspredef-326)
Steps:
1. Log into desktop
2. Run s3/s4 stress test for 30 times
Expected results:
Suspend and hibernate stress got passed without any error
Actual results:
s3/s4 got failures in log file
Diagnosis:
This warning is generated by the ACPI LED method expects 1 argument, but the
kernel driver thinkpad_acpi.c function led_set_status will evaluate the ACPI
LED method with two arguments (let and led_status):
Method (LED, 1, NotSerialized)
{
If (H8DR)
{
Store (Arg0, MLED)
}
Else
{
And (RBEC (0x0B), 0xFD, Local0)
Or (Local0, Arg0, Local0)
WBEC (0x0B, Local0)
}
}
and I also checked with lenovo thiinkpad x220, x200, seems it accepts two
arguments in ACPI LED method:
Method (LED, 2, NotSerialized)
{
Or (Arg0, Arg1, Local0)
If (\H8DR)
{
Store (Local0, HLCL)
}
Else
{
\WBEC (0x0C, Local0)
}
}
It seems the spec change, if yes, we might need the spec.
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