About the time clock , as I know , its about the crystal , called jitter ? You can correct it with NTP client or GPS , ( if you have gps )
2014-11-30 23:55 GMT+08:00 <meino.cra...@gmx.de>: > Hi, > > I am using a Arietta G25 (http://www.acmesystems.it/arietta) with > Robert Nelsons Kernel 3.17.3 and the kernel configuration provided > by Acmesystems for their Debian Linux for the Arietta G25 based on > Linux kernel 3.16.1. > As far as I know the only patches they used are agains dts/dtb files > (I use the same ones) and to configure the kernel without the need of > using makeconfig. > > So far so nice...the system boots with a Gentoo stage3 rootfs. > > There only two things left: > 1.) shuthdown -h -H now (as said to be used by Acmesystems) reboots > the system instead of powering it off (which works with their > image). > > 2.) The at91 RTC is missing the "Real"...the difference are several > minutes per hour. > > I compared the dmesg output of the Arietta G25 booted with one and > the other system. With the Gentoo system there is one line which > irritates me and may indicate a way to a solution for the RTC problem: > > [ 0.000000] Main crystal frequency not set, using approximate value > [ 0.000000] master clk is overclocked > [ 0.000000] sched_clock: 32 bits at 128 Hz, resolution 7812500ns, wraps > every 16777216000000000ns > [ 0.000000] Console: colour dummy device 80x30 > [ 0.054687] Calibrating delay loop... 220.07 BogoMIPS (lpj=862208) > > The clock frequency of the CPU is unknown??? The Debian system does > not have that problem... > > Any suggestion how to fix one or (better! :) both problem is VERY 8) > appreciated! Thank you very much in advance for any help! > > Best regards, > Meino > > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
