Re: [PATCH] rtc: Disable EFI rtc for x86

Austin S Hemmelgarn
2014-11-11T12:14:23Z

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On 2014-11-11 06:38, One Thousand Gnomes wrote:
>>> look further into the options I have set in my kernel build, I may have
>>> changed something else without remembering between booting with and
>>> without the CSM enabled.
>>>
>>
>> It could also be that the non-CSM BIOS somehow remaps the CMOS registers.
>
> I don't believe there is anything which prevents the CSM from faking a
> CMOS clock using SMM from whatever is actually in the hardware.
>
> Alan
>
It wouldn't surprise me if that were the case. I've had some pretty
weird firmware related issues with other Lenovo systems before (like the
brightness hot-keys causing the reported trip points for ACPI thermal
zones to temporarily change).

I've rebuilt the kernel I'm using with everything I can think of
possibly depending on the CSM compiled out or as modules, so I'll
hopefully have some more info soon.

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