On 2014-11-10 12:04, Matthew Garrett wrote:
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.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.
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