Motivation:

Cards based on the Mediatek MT7916AN chipset such as AsiaRF's AW7916-NPD and AW7916-AED must be explicitly configured to use either the 6GHz band or the 5GHz band by setting the param enable_6ghz in the module mt7915e. The card may otherwise not work.

Bug:

This setting is not being done in VyOS, despite advertising the card would work out of the box (see T6320). A few months after T6320 was merged, the parameter enable_6ghz was introduced into the module mt7915e (see here) and newer firmware was announced to cease to work unless the parameter was configured. The card may need a full system reboot in order to correctly reload its firmware with the correct settings.

Workaround:

Manually add a file /etc/modprobe.d/mt7915e.conf with the parameter configuration for either 5GHz or 6GHz operation:

# 6GHz
options mt7915e enable_6ghz=1
# 5GHz
#options mt7915e enable_6ghz=0