Yellow reports only 8GB of RAM on CM5 with 16GB

[goll]

Describe the issue you are experiencing

I have a HA Yellow with a CM5. Installed HAOS 15.0 using rpiboot without any issues.

System only reports 8GB of RAM on a 16GB RAM CM5.

$ free -m
              total        used        free      shared  buff/cache   available
Mem:           7943        1279        5222           2        1442        6582
Swap:          2621           0        2621

$ dmesg | grep Memory
[    0.000000] Memory: 8062484K/8384512K available (15232K kernel code, 2294K rwdata, 4824K rodata, 5248K init, 1110K bss, 256492K reserved, 65536K cma-reserved)

What operating system image do you use?

yellow (Home Assistant Yellow)

What version of Home Assistant Operating System is installed?

15.0

Did the problem occur after upgrading the Operating System?

No

Hardware details

• HA Yellow standard 1.3
• RPi CM5 model CM5116032 (WiFi, 16GB RAM/32GB eMMC) Rev6
• CPU revision e04180 (/proc/cpuinfo)

Steps to reproduce the issue

1. Install HAOS using rpiboot
2. See 8GB of RAM instead of 16GB

Anything in the Supervisor logs that might be useful for us?

Nope

Anything in the Host logs that might be useful for us?

Nope

System information

System Information

version	core-2025.3.4
installation_type	Home Assistant OS
dev	false
hassio	true
docker	true
user	root
virtualenv	false
python_version	3.13.2
os_name	Linux
os_version	6.6.74-haos-raspi
arch	aarch64
timezone	Europe/Zagreb
config_dir	/config

Home Assistant Community Store

GitHub API	ok
GitHub Content	ok
GitHub Web	ok
HACS Data	ok
GitHub API Calls Remaining	5000
Installed Version	2.0.5
Stage	running
Available Repositories	1621
Downloaded Repositories	5

Home Assistant Supervisor

host_os	Home Assistant OS 15.0
update_channel	stable
supervisor_version	supervisor-2025.03.3
agent_version	1.7.2
docker_version	28.0.1
disk_total	28.0 GB
disk_used	6.5 GB
healthy	true
supported	true
host_connectivity	true
supervisor_connectivity	true
ntp_synchronized	true
virtualization
board	yellow
supervisor_api	ok
version_api	ok
installed_addons	Terminal & SSH (9.16.0), Piper (1.5.2), Whisper (2.4.0), Mosquitto broker (6.5.0)

Dashboards

dashboards	3
resources	1
views	1
mode	storage

Network Configuration

REDACTED

Recorder

oldest_recorder_run	March 19, 2025 at 3:23 PM
current_recorder_run	March 28, 2025 at 11:00 PM
estimated_db_size	5.46 MiB
database_engine	sqlite
database_version	3.48.0

Sonoff

version	3.8.2 (c4b6fda)
cloud_online	1 / 1
local_online	1 / 1

Additional information

[sairon]

Unfortunately I don't have it to check, but is it detected correctly in RPi OS?

[goll]

Haven't checked yet, if I understood correctly my only option would be a rpiboot fresh install on the eMMC? I don't have a spare NVMe atm.

[sairon]

Exactly, install RPi OS the same way through rpiboot as you installed HAOS. It might be worth trying to install HAOS for RPi 5 to eMMC, but in that case couple of changes will be needed so you can at least check the serial console. I can provide the instructions later if you can test that too.

[goll]

Used 2024-11-19-raspios-bookworm-arm64-lite.img.xz and immediately shows the correct amount of RAM:

$ free -m
               total        used        free      shared  buff/cache   available
Mem:           16196         265       15927           5         144       15931
Swap:            511           0         511

Grabbed the bootlader_version:

$ vcgencmd bootloader_version
2025/01/22 00:16:51
version a77530632346c8ac1d579fa3c369f9980401e821 (release)
timestamp 1737505011
update-time 0
capabilities 0x0000007f

[Handl3vogn]

Just upgraded my yellow from a cm4 8gb to a cm5 16gb (cm5116032).
And homeassistant is only reporting 8gb.
So same issue happening here.