Public bug reported: The Pi Zero 2W, 2B, and 3B all fail to light their power LED once the kernel starts booting under noble (I hope this is only on noble; I only just noticed this during ISO testing and it's quite possible I missed it on earlier revisions...).
Specifically, on the 2W (which only has a combined activity and power LED), /sys/class/leds/ACT/trigger is [actpwr] on RaspiOS, which makes it illuminate by default and blink off during mmc0 activity. This trigger setting appears to be unavailable under the Ubuntu kernel. On the 2B and 3B, the trigger is set to [none] which results in the LED initially illuminating while the bootloader is running and then disappearing. The default under RaspiOS is [input] which makes it illuminate normally, but switch off on undervolt. This trigger settging also appears unavailable under the Ubuntu kernel. ** Affects: linux-raspi (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: raspi-image rls-nn-incoming ** Tags added: raspi-image ** Changed in: linux-raspi (Ubuntu) Status: New => Confirmed ** Tags added: rls-nn-incoming -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-raspi in Ubuntu. https://bugs.launchpad.net/bugs/2060942 Title: Missing power LED on earlier models Status in linux-raspi package in Ubuntu: Confirmed Bug description: The Pi Zero 2W, 2B, and 3B all fail to light their power LED once the kernel starts booting under noble (I hope this is only on noble; I only just noticed this during ISO testing and it's quite possible I missed it on earlier revisions...). Specifically, on the 2W (which only has a combined activity and power LED), /sys/class/leds/ACT/trigger is [actpwr] on RaspiOS, which makes it illuminate by default and blink off during mmc0 activity. This trigger setting appears to be unavailable under the Ubuntu kernel. On the 2B and 3B, the trigger is set to [none] which results in the LED initially illuminating while the bootloader is running and then disappearing. The default under RaspiOS is [input] which makes it illuminate normally, but switch off on undervolt. This trigger settging also appears unavailable under the Ubuntu kernel. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/2060942/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp