Dear support team,
after updating Reachy2 and rebooting , I am getting the repeating bubble sound and the core service cannot start.
There is an error about “bad serial number” but dont know what to make of it. Attached you find also a screenshot from the tio session, where I also got a grub and ethercat error. The grub error does not persist. I can log on to the bedrock pc via tio and ssh and also on to the dashboard via ethernet connection.
This is copied from the dashboard logs:
Kcore exited with code 0
Container core Removing
Container core Stopped
core | Playing WAVE ‘/home/reachy/dev/reachy2_sounds/MA_BANT_Bubbles_Pops_2.wav’ : Signed 24 bit Little Endian in 3bytes, Rate 48000 Hz, Stereo
core | [ERROR] [launch]: Caught exception in launch (see debug for traceback): Bad serial number “r2-0002”. Expected values are [‘dvt’, ‘beta’, ‘pvt’]
core | Validating configuration files…
core |
core | Replaced mobile_base.serial_number MB-001 => MB-0032
core | Replaced serial_number reachy2-pvt-default => r2-0002
core | e[93m[reachy.yaml] configuration overridee[0m
core |
core | --------------------------------------------------
core | Configuration
core | --------------------------------------------------
core | [INFO] [launch.user]:
core | No logs&bags to clear
core | [INFO] [launch]: Default logging verbosity is set to INFO
core | [INFO] [launch]: All log files can be found below /home/reachy/.ros/log/2025-09-19-15-15-52-495716-r2-0002-107
core | Sound config written to ~/.asoundrc
core | Buffer Size: 2048
core | Period Size: 512
core | Source Card: 1,0
core | Sink Card: 1,0
core | ALSA configuration generated with the following settings:
core | Input : Rode, Output: Rode
Container core Stopping
Stopping Reachy2 Core…
Attaching to core
Container core Created
Container core Creating
Started Reachy2 Core.
What a clear sky to launch a [core] container
Starting Reachy2 Core…
Stopped Reachy2 Core.
reachy2-core.service: Scheduled restart job, restart counter is at 55.
reachy2-core.service: Deactivated successfully.
Container core Removed
Container core Removing
Container core Stopped
Container core Stopping
e[Kcore exited with code 0
core | Playing WAVE ‘/home/reachy/dev/reachy2_sounds/MA_BANT_Bubbles_Pops_2.wav’ : Signed 24 bit Little Endian in 3bytes, Rate 48000 Hz, Stereo
core | [ERROR] [launch]: Caught exception in launch (see debug for traceback): Bad serial number “r2-0002”. Expected values are [‘dvt’, ‘beta’, ‘pvt’]
core | Validating configuration files…
core |
core | Replaced mobile_base.serial_number MB-001 => MB-0032
core | Replaced serial_number reachy2-pvt-default => r2-0002
core | e[93m[reachy.yaml] configuration overridee[0m
core |
core | --------------------------------------------------
core | Configuration
core | --------------------------------------------------
core | [INFO] [launch.user]:
…….
and it goes on like this forever ……
NOTE: I need use fixed IPs with Reachy in order to connect to my companys network. Both for ethernet and wifi. I am doing that through a netplan configuration but dont think that this has anything to do with the core service not starting.
Thanks for your help,
Alexandros
