On Wednesday 29 November 2017 12:51:56 Jon Elson wrote: > Hello, all, > > I have an everything-server here that runs an old version of > Ubuntu LinuxCNC, mostly for historical (hysterical??) > reasons. Kernel is 2.6.32-122-rtai > > I just had to replace the hardware due to the old one > getting flaky. The new one is a Dell Optiplex 980 with > an Intel i5 CPU, and the system clock drifts badly in the > negative direction. I had been running ntpdate daily by > cron, and this system has a negative time jump of about 12 > seconds when that runs. This causes dovecot to kill itself. > (Doesn't seem to mind positive time jumps.) > > I was never able to get ntpd to run on this, probably due to > the rtai kernel. > > Right now, I changed to running ntpdate hourly, and it gets > a -0.5 second correction, which might be just fine. > > Does anybody have an idea on how to get the clock to be more > accurate (without changing out the CPU clock crystal)? > > Thanks, > > Jon > I've not had to use it in recent history Jon, because ntpd seems to run ok. On everything I have here.
But there is still, in my wheezy listings, adjtimex, which does rather like ntpd, but adjusts the clock itself until it only has to correct it once or twice a day. if the clock starts wandering again, it will shorten the update interval until it either has it in hand, or has run out of adjustment. Its such an old standard, I be dissappointed if its not in your *buntu repo's. Either one of course needs unfettered access to the internet, and a list of 4 or so time servers, such as at pool.ntp.net or whatever your isp uses for a master clock. > ---------------------------------------------------------------------- >-------- Check out the vibrant tech community on one of the world's > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
