在「Reducing Raspberry Pi 5's power consumption by 140x」這邊看到的,講 Raspberry Pi 5 在 shutdown 狀態下電力消耗過高的問題。
依據 Jeff Geerling 提到,在 shutdown 狀態下仍然會消耗 1.2W~1.6W:
Because of this, a Pi 5 will still sit there consuming 1.2-1.6W when completely shut down, even without anything plugged in except power.
也有提到解決方法是把 POWER_OFF_ON_HALT
改成 1
,他給的範例另外有多一些設定,但跟這次的功耗問題無關:
[all] BOOT_UART=1 WAKE_ON_GPIO=0 POWER_OFF_ON_HALT=1
依照文章裡面的說明設定好,重開再 shutdown 測試就可以看到整個降下來了:
Save that configuration and reboot, then next time you shut down, you should see power consumption go down from 1-2W to 0.01W or even less:
應該算是某種 bug 或是 regression,後續預設值應該會修正?