Rate seems limited to 1M

[GNUtoo at no-log.org]

> What signal strength does the Gentoo laptop report at various locations?
At the usual place:
1M           Link Quality=48/100  Signal level=-70 dBm
54M          Link Quality=48/100  Signal level=-72 dBm
Near the router's antenna:
1M           Link Quality=58/100  Signal level=-9 dBm
54M          Link Quality=58/100  Signal level=-9 dBm