Questions tagged [clock]
Questions about the timekeeping mechanisms on Unix/Linux systems and/or interaction with the on-board hardware clock. Questions on the use of network time protocols should use the respective tags for those instead, unless they also involve the system's hardware clock. Not to be used for questions on the CPU's clock oscillator frequency (aka "overclocking").
186 questions
1 vote
0 answers
19 views
Clock in Plasma taskbar gone after upgrade to Debian 13 - how to display time again?
After upgrading from Debian 12 with KDE to Debian 13 the clock in the bottom right of the taskbar is gone. I used Event Calender and now the calendar is not working anymore and shows "This Widget ...
- 4,896
0 votes
0 answers
71 views
PTP time sync in slave device not working?
I am trying to sync hardware clock with software clock in slave device in ptp setup, but the offset value suddenly jumps from 28 ns to -617 ns. I tried varying pi_proportional_const(0.7) and ...
- 1
0 votes
0 answers
63 views
Changed behavior of sleep command in Linux suspend and resume testing
I am working on an embedded Linux system (kernel-5.10.220). Now I am testing the suspend and resume in this system with a watchdog time as the wakeup source to wake system up from suspend. The ...
- 651
0 votes
2 answers
301 views
How to confirm that the kernel is (or is not) updating the hwclock/RTC
This question is a follow-up to this answer. In general, my objective is to learn if my system (Debian/Raspberry Pi 5 'bookworm') is updating my RTC/hardware clock from the system time. Please note ...
- 3,898
4 votes
1 answer
725 views
Show live clock in bash in front of command prompt
I am looking for a way to show the current live time/clock in bash before the command prompt. What I researched so far, there are some possibilities for that. E.g. I know the bash variable PS1 can be ...
- 273
3 votes
0 answers
93 views
Linux clock source from FPGA
I'm trying to get the Linux kernel (and system as a whole) to sync to a monotonically incrementing clock from a FPGA register in memory. The clock is 64-bits wide and divided into two 32-bit sections: ...
0 votes
4 answers
1k views
System clock offsetting from HW clock on boot
I recently did a full update to my Arch Linux system and now, for some reason, the system clock is being set to an offset of +5 hours on boot, compared to the HW clock. I am in US EST (UTC-5). When I ...
- 2,650
0 votes
0 answers
247 views
How can I force systemd journalctl to output log in sequential order in case of frequent clock changes?
I have a standalone debian-based system that -- for the simplicity -- can be taken as not having RTC. The system clock can be set during operation, both forwards and backwards. I thought that ...
- 101