Cooling_fan not recognized after bootloader/firmware update to 2025/03/19 13:41:26 version cec1d3ae (release) (embedded) #690
Description
Describe the bug
Issue can be reproduced on 2 Raspberry Pi 5 with fresh image of Raspberry Pi OS Lite 64bit Bookworm on an SDCARD.
With the bootloader/firmware version from 2025/03/10, the active cooler (original Raspberry Pi cooler) is reliably recognized as can be seen in "cat /sys/devices/platform/cooling_fan/hwmon/hwmon1/fan1_input".
With the updated version the cooling_fan folder won't get created as the system does not seem to recognize the cooler.
A workaround seems to be manually adding the "dtparam=cooling_fan" in /boot/firmware/config.txt.
The kernel version of the fresh image is 6.1.51 and gets updated to 6.12.20 by apt upgrade. However, kernel version does not seem to make a difference.
What could be reason?
Steps to reproduce the behaviour
- sudo raspi-config
- 6 Advanced Options >> A5 Bootloader Version >> Switch between "E1 Latest" = 2025/03/19 and "E2 Default" = 2025/03/10
- Reboot and check the existence of the folder /sys/devices/platform/cooling_fan/
Device (s)
Raspberry Pi 5
Bootloader configuration.
rpi-eeprom-config
[all]
BOOT_UART=1
BOOT_ORDER=0xf461
NET_INSTALL_AT_POWER_ON=1
rpi-eeprom-update
BOOTLOADER: up to date
CURRENT: Wed 19 Mar 13:41:26 UTC 2025 (1742391686)
LATEST: Wed 19 Mar 13:41:26 UTC 2025 (1742391686)
RELEASE: latest (/usr/lib/firmware/raspberrypi/bootloader-2712/latest)
Use raspi-config to change the release
System
cat /etc/rpi-issue
Raspberry Pi reference 2024-11-19
Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 891df1e21ed2b6099a2e6a13e26c91dea44b34d4, stage2
vcgencmd bootloader_version
2025/03/19 13:41:26
version cec1d3ae40f4a1cb24fe3c42d60153968695385b (release)
timestamp 1742391686
update-time 1743694228
capabilities 0x0000007f
vcgencmd version
2025/03/19 13:41:26
Copyright (c) 2012 Broadcom
version cec1d3ae (release) (embedded)
uname -a
Linux 6.12.20+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.12.20-1+rpt1~bpo12+1 (2025-03-19) aarch64 GNU/Linux
Bootloader logs
No response
USB boot
No response
NVMe boot
No response
Network (TFTP boot)
No response