Messages in this thread | | | Date | Tue, 11 Nov 2014 07:14:15 -0500 | From | Austin S Hemmelgarn <> | Subject | Re: [PATCH] rtc: Disable EFI rtc for x86 |
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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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