On Sat, Jan 31, 2009 at 2:43 PM, Dale <rdalek1...@gmail.com> wrote: > Mark Knecht wrote: >> Hi, >> I know nothing of this part of the Linux boot process. If it's >> *fairly* simple can someone point me at the right stuff to understand >> how Gentoo creates a link from /dev/rtc to rtc0? When in the boot >> process does this link become valid? >> >> Is it something that's held in a file and recreated from that file >> on each boot? Is it created automagically by Gentoo Angels that look >> after my well being but seldom reveal themselves? Is it created by the >> kernel itself when something is specifically configured to do so? >> Something else? >> >> Thanks, >> Mark >> >> lightning src # uname -a >> Linux lightning 2.6.27-gentoo-r8 #6 Fri Jan 30 18:55:56 PST 2009 >> x86_64 AMD Athlon(tm) 64 Processor 3000+ AuthenticAMD GNU/Linux >> lightning src # ls -al /dev/rtc* >> lrwxrwxrwx 1 root root 4 2009-01-30 10:58 /dev/rtc -> rtc0 >> crw-r--r-- 1 root root 254, 0 2009-01-30 10:58 /dev/rtc0 >> lightning src # >> >> >> > > From my understanding udev creates all the "stuff" in /dev. You can > change the rules that it uses to make them tho. I think there is > documentation on gentoo.org to help with that. So far, mine has worked > well enough. Lucky I guess. > > That help? > > Dale
Hi Dale, While poking around in a bunch of different kernel config files - some gentoo-sources - some not - I found there is an option in Device Drivers -> RTC that ONLY shows up when you tell the kernel to build the support in. (I.e. - not off or modular) The option says <*> Set system time from RTC on startup or resume (rtc0) RTC used to set the system time So, it appears it's a kernel oriented thing which allows it to get set very early in the boot process. My problem on a kernel I built yesterday was "File has a date in the future" sort of messages. I had this set as modular so it couldn't load that early. The other problem was that since it was a module and apparently I didn't load that module the command hwclock -r failed. I've reconfigured the kernel and will build it and test after I get finished with an emerge -e world later today. Thanks for the response. Hope this info helps someone else in the future. (and me after the reboot!) ;-) Cheers, Mark
