Powernow-k8 buggy BIOS override for 2.6.6]
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Quoted 10 lines · Tony Lindgren
Following is the updated patch to make the powernow-k8 driver work on machines with buggy BIOS, such as emachines m6805.
The patch overrides the PST table only if
check_pst_table()fails.The minimum value for the override is 800MHz, which is the lowest value on all
x86_64systems AFAIK. The max value is the current running value.This patch should be safe to apply, even if Pavel's ACPI table check is added to the driver. Or does anybody see a problem with it?
Does the ACPI fallback not do the right thing ?
I don't really see the point of limping along with a 2-state PST if we can derive the proper info from the ACPI table.
Dave
Quoted 7 lines · Dave Jones
Quoted 5 lines · Tony Lindgren
Following is the updated patch to make the powernow-k8 driver work on machines with buggy BIOS, such as emachines m6805.
The patch overrides the PST table only if
check_pst_table()fails.
Quoted 7 lines
Quoted 5 lines
The minimum value for the override is 800MHz, which is the lowest value on all
x86_64systems AFAIK. The max value is the current running value.This patch should be safe to apply, even if Pavel's ACPI table check is added to the driver. Or does anybody see a problem with it?
Does the ACPI fallback not do the right thing ?
Does not work for me. But looks like that's because I had to turn off ACPI processor module since 2.6.6 since it would hang my system. It could also be that the hang is caused by the powernow-k8. I will check that.
Quoted 2 lines
I don't really see the point of limping along with a 2-state PST if we can derive the proper info from the ACPI table.
Sure if the ACPI table check works properly. But even with 2-state PST, being able to change from 1800MHz to 800MHz on battery increases the battery life quite a bit. And it does not necessarily require ACPI :)
Regards,
Tony