powertop showed a few tunables that were “bad”, but --auto-tune didn’t have much of an effect on the power draw, unfortunately.
Bad VM writeback timeout
Bad Runtime PM for PCI Device Mellanox Technologies MT2910 Family [ConnectX-7]
Bad Runtime PM for PCI Device Realtek Semiconductor Co., Ltd. Device 8127
Bad Runtime PM for PCI Device Mellanox Technologies MT2910 Family [ConnectX-7]
Bad Runtime PM for PCI Device MEDIATEK Corp. Device 7925
Bad Runtime PM for PCI Device Mellanox Technologies MT2910 Family [ConnectX-7]
Bad Runtime PM for PCI Device Samsung Electronics Co Ltd Device a810
Bad Runtime PM for PCI Device Mellanox Technologies MT2910 Family [ConnectX-7]
Good NMI watchdog should be turned off
Good Bluetooth device interface status
I also remembered that wifi and bluetooth were enabled out of the box, so turned both of those off with both rfkill and nmcli radio all off. Not much of an effect on power there, either, unfortunately.
What DID have an effect was disconnecting the direct-attach cable from the ConnectX-7. That dropped power usage by nearly 4W, but it’s still idling at 36W or so.
