** Changed in: linux-raspi (Ubuntu Mantic)
Status: Confirmed => In Progress
** Changed in: linux-raspi (Ubuntu)
Status: Confirmed => Invalid
** Changed in: linux-raspi (Ubuntu Mantic)
Assignee: (unassigned) => Juerg Haefliger (juergh)
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https://bugs.launchpad.net/bugs/2041741
Title:
Fan speed control not working on Pi 5 under Ubuntu 23.10
Status in linux-raspi package in Ubuntu:
Invalid
Status in linux-raspi source package in Mantic:
In Progress
Bug description:
[Impact]
The fan speed control when running Ubuntu 23.10 on a Raspberry Pi 5
does not appear to be working. The fan runs at near maximum speed all
the time and the cur_state in /sys/class/thermal/cooling_device0/ is
stuck at the value of 4 no matter what the CPU temperature. I suspect
it is related to this fault reported on Raspberry Pi OS:
https://forums.raspberrypi.com/viewtopic.php?t=356881
[Test Case]
Plug in a fan and verify that it does not run at full speed all the
times.
[Regression Potential]
Simple modification to the step_wise thermal governor. If bad, might
result in fans always spinning or not at all.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/2041741/+subscriptions
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