Messages in this thread | | | Date | Mon, 10 Nov 2014 15:37:34 -0500 | From | Austin S Hemmelgarn <> | Subject | Re: [PATCH] rtc: Disable EFI rtc for x86 |
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On 2014-11-10 12:04, Matthew Garrett wrote: > On Mon, Nov 10, 2014 at 11:45:06AM -0500, Austin S Hemmelgarn wrote: > >> I agree, without it you need PC CMOS RTC support to access the RTC >> on most systems, which in turn means that you have to enable the CSM >> in the EFI firmware, which is annoying cause you can't easily dual >> boot windows with secure boot when the CSM is enabled. > > CMOS RTC support doesn't depend on the CSM. > That's really interesting, because with it compiled in, I can't boot on my EFI based thinkpad laptop without telling EFI to launch the CSM, and with it compiled out, I can boot fine without the CSM. I'll have to 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.
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