Pi 5: Active Cooler runs at full speed on Ubuntu 23.10
A quick fix for the fan running at 100% speed on a Raspberry Pi 5 with Ubuntu 23.10.
This is a short post regarding an issue that I found when running Ubuntu 23.10 on a new Raspberry Pi 5 with the Active Cooler fan.
The issue: The fan was running at 100% speed regardless of the actual temperature.
Information regarding this issue:
https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/2041741
The fix: A new kernel 6.5.0-1008-raspi was released with the patch included on December 5th, 2023 to solve this issue.
sudo apt update && sudo apt upgrade
sudo rebootUbuntu 23.10 Terminal
Confirm fixed:
Audibly, the fan will considerably quiet down. Otherwise, check the kernel version. If you're at this kernel 6.5.0-1008-raspi or later, the issue should be mitigated upon rebooting into the new kernel.
# uname -r
6.5.0-1008-raspiUbuntu 23.10 Kernel Version