mharsch/rtc_trixie.md

Created May 10, 2026 01:56

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Configure POWERplate24 Realtime Clock on Raspberry Pi OS Trixie

Raw

rtc_trixie.md

Notes

Trixie doesn't install fake-hwclock by default (no need to remove)
Kernel will pick up rtc time early in the boot process automatically
Supposedly, the kernel watches drift and syncs rtc every 11 minutes
No startup scripts to modify anymore (changed with Trixie)

Setup Procedure

enable i2c using raspi-config
add dtoverlay=i2c-rtc,pcf8523 to /boot/firmware/config.txt
install hwclock by installing the package util-linux-extra
reboot
check date with timedatectl status
if the rtc time doesn't match system time, sync with sudo hwclock -w

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