On 4/12/25 11:42, Jon Elson wrote:
On 4/12/25 04:35, Nicklas SB Karlsson wrote:
Think I had some similar problem with a computer years ago. Might
have been something with the graphics card I had to
disable but can't remember.
OK, I have had a similar problem on a Beagle Bone computer. The issue
was tracked down to bad times left in the system log, and the computer
booting up with ancient time of day settings that dated back to when
it was compiled. This was on a point-to-point network where we were
not permitted to get onto the hospital's internal network. Do you
have a network time server on your network, that can provide correct
time to the computer when it boots up? If not, can the computer reach
a network time server on the wide area net? Is that address
programmed in?
The issue seems to be when the system starts with an ancient time
setting, runs for a couple hours and is then shut down. the clock at
shutdown is ancient + 2 hours. Then, next time you boot, the time is
set back to "ancient", ie, 2 hours BEFORE the last time in the logs.
This causes any process that needs some privilege, like LinuxCNC, to
hang for some timeout period.
I don't know if this is Gene's problem, but it sounds like it could be.
My printers are all klipper powered, no hdwe clocks on arm64's. So I
have ntpsec setup on this machine, using debians pool for a reference,
making this machine a level 3 ntp server, and all the printers except
one, which seems to be hard coded in an old bullseye install, use this
machine for chrony, which works better than ntpsec on arm64's. So my
whole net has a max of maybe 1 millisecond error compared to the others,
maybe 3 milisecs from debians pool, So I'm not abusing pool.debian.org.
At least that is the theory. I also have dhcpd setup to serve only the
MAC of that particular printer.
One manual fix was to set the clock to the actual time with the date
command.
I do that as a primer on the arm64's before I launch chrony on the arms.
Jon
Thanks Jon.
Cheers, Gene Heskett, CET.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
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