system time instability

[Hrant Dadivanyan]

> On Mon, Dec 12, 2016 at 11:04:08PM +0400, Hrant Dadivanyan wrote:
> > Now, when you ask, I start to suspect PPS delivery to uart again - cable
> > and amplifier, but can't understand how the 100ppm error fits into that.
> 
> If you disable PPS sync in ntp config, does the machine keep time adequately ?
> 

Thanks for reminding - yes, I've tried this as well, the issue persists.
So uart shouldn't be in charge.

> There might be relatively long pauses when system management mode handlers
> do something in response to hw events.  E.g. if you have USB emulation of
> AT keyboard enabled in BIOS, try to disable that.  And update the BIOS.

The USB is switched off in the BIOS. I've removed all changes in sysctl.conf
and nice flag from ntpd, recompiled kernel as following:
include         GENERIC
options         PPS_SYNC
device          pf
device          pflog
and started over. Dmesg is attached.

Thank you,
Hrant

-- 
Hrant Dadivanyan (aka Ran d'Adi)		hrant(at)dadivanyan.net
/* "Feci quod potui, faciant meliora potentes." */       ran(at)psg.com
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