I have several NICs enslaved to a bridge.
Enabling powermanagement (setting the pcie device power/control to auto) for
an intel I211 Gigabit Network device hangs the Linux kernel's netlink interface.
Commands like `ip addr show` no longer work but just hang.
Note: There's nothing connected to the i211, so I assume it goes to sleep indeed.
There's no recovery -- trying to echo "on" to the power/control does not recover
the netlink interface -- I have not found a better recovery than rebooting yet.
This problem did not exist in 5.10.y kernels, it does exist in 5.15..
The device is powered by the igb driver.
Let me know if this problem is not known yet and you need more information.
Kurt Garloff <[email protected]>