Hi.
I used you dsdt.dsl. So, there are two warnings:
DSDT.dsl 1793: Method (Z010, 2, NotSerialized)
Warning 1086 - ^ Not all control paths return a value
(Z010)
DSDT.dsl 2444: And (Local1, 0x01)
Warning 1104 - ^ Result is not used, operator
has no effect
My dsdt.dsl has the same warnings. I removed it making:
1) in warning 1086 add before last "}":
Return (Package (0x02)
{
0x00,
0x00
})
2) in warning 1104 add:
And (Local1, 0x01, Local1)
The dmesg output is:
1) Thats ok
[ 13.965572] ACPI: Looking for DSDT in initramfs... successfully read 41851
bytes from /DSDT.aml.
[ 13.965606] ACPI: Table DSDT replaced by host OS
but
2) Not ok
ACPI Error (psargs-0355): [\_PR_.CPU0._PSS] Namespace lookup failure,
AE_NOT_FOUND
ACPI Error (psparse-0537): Method parse/execution failed [\_PR_.CPU1._PSS]
(Node c31271b0), AE_NOT_FOUND
ACPI Exception (processor_perflib-0234): AE_NOT_FOUND, Evaluating _PSS
[20070126]
--
ACPI Error [...] AE_NOT_FOUND -> Frequency scaling not working at all on C2D
T7500
https://bugs.launchpad.net/bugs/176311
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