bigtreetech / bigtreetech/CB2

Clock not syncing

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Description

Every time I boot my printer, the date is way wrong. My CB2 is not setting time via NTP servers, even though they're reachable.

after setting the time, `timedatectl` shows:
``` Local time: Thu 2026-03-12 13:21:04 EDT
Universal time: Thu 2026-03-12 17:21:04 UTC
RTC time: Fri 2017-08-04 10:55:19
Time zone: America/New_York (EDT, -0400)
System clock synchronized: no
NTP service: active
RTC in local TZ: no
```

For some reason the RTC is way off

`timedatectl show-timesync` shows
```SystemNTPServers=0.pool.ntp.org 1.pool.ntp.org 2.pool.ntp.org 3.pool.ntp.org
FallbackNTPServers=0.debian.pool.ntp.org 1.debian.pool.ntp.org 2.debian.pool.ntp.org 3.debian.pool.ntp.org
RootDistanceMaxUSec=5s
PollIntervalMinUSec=32s
PollIntervalMaxUSec=34min 8s
PollIntervalUSec=0
Frequency=0
```

Contributor guide

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Research direction

Start by reproducing the problem after boot and inspect the output of `timedatectl` and `timedatectl show-timesync`. Done means the RTC retains the correct time across boots and the system reports successful NTP synchronization.

Written by the indexing model from the issue text.

Assessment

Tech stack
debian, linux
Domain
embedded-iot, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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