shm refclock

Paul Theodoropoulos paul at
Wed Apr 10 21:26:42 UTC 2019

On 4/10/19 14:03, dropkick23 at wrote:
> On Sat, 6 Apr 2019 16:21:50 -0700
> Paul Theodoropoulos <paul at <mailto:paul at>> 
> wrote:
> > gpsd needs to start before ntpd when using shm refclock.
> That is completely opposite from my experience.  I have two systemd 
> service files one to start gpsd and one to start ntpd.  the ntpd 
> service file is from ntpsec distribution. gpsd service file is from 
> gpsd distribution and edited to remove reference to gpsd.socket and 
> change After=chronyd.service to ntpd.service.
> New system fresh install of Arch Linux ARM, GPSD and NTPD.
> System is raspi 3+
> Linux tock2 4.19.34-1-ARCH #1 SMP PREEMPT Wed Apr 10 00:14:00 UTC 2019 
> armv7l GNU/Linux

I guess I'd assume then that it's a difference between Raspbian and Arch 
- unless maybe it's something in the /boot/cmdline.txt or config.txt 
hardware setup?

root at RaspiPi3B+ NTPsec: ~ # cat /boot/config.txt

root at RaspiPi3B+ NTPsec: ~ # cat /boot/cmdline.txt
root=/dev/mmcblk0p2 rootfstype=f2fs elevator=deadline 
rootwait nohz=off ipv6.disable=1 dwc_otg.lpm_enable=0 
dwc_otg.fiq_fsm_enable=0 dwc_otg.fiq_enable=0 dwc_otg.nak_holdoff_enable=0

But none of that looks particularly like it'd affect device permissions 
or such.

Paul Theodoropoulos

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