rsu wireless driver crapshoot

My Internet connection on this computer is very iffy at best, not running as I type this. 

Motherboard is MSI Z77 MPOWER. 

Ethernet is Realtek (re): good with NetBSD, Linux and Haiku, (Free,Open and DragonFly)BSD bug out.

Only Internet connection for FreeBSD is Hiro H50191 USB-stick wireless adapter, chipset RTL8191SU, device rsu.

Sometimes it connects.  Running ifconfig (by itself), I get, whether connection is working ot not,

lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
	options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
	inet6 ::1 prefixlen 128 
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 
	inet 127.0.0.1 netmask 0xff000000 
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
rsu0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 2290
	options=1<RXCSUM>
	ether 00:13:33:a2:86:f0
	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
	media: IEEE 802.11 Wireless Ethernet autoselect mode 11g
	status: associated
wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	ether 00:13:33:a2:86:f0
	inet 192.168.0.102 netmask 0xffffff00 broadcast 192.168.0.255 
	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
	media: IEEE 802.11 Wireless Ethernet OFDM/54Mbps mode 11g
	status: associated
	ssid Maclura_pomifera channel 8 (2447 MHz 11g) bssid a0:f3:c1:f9:39:7a
	country US authmode WPA2/802.11i privacy ON deftxkey UNDEF
	AES-CCM 2:128-bit txpower 0 bmiss 7 scanvalid 60 bgscan
	bgscanintvl 300 bgscanidle 250 roam:rssi 7 roam:rate 5 protmode CTS
	roaming MANUAL

Looks good, but running host on a valid domain, such as
host bluegrass.net
gives me

;; connection timed out; no servers could be reached

Even when the connection is successful, it can quit any time without warning, and only way I can tell is by trying to reach an internet domain.

I feel like Cinderella, but she had the advantage of knowing that her coach would turn back to a pumpkin at exactly midnight.

Internet connectivity problems are the same whether I run FreeBSD-current or 10.0-STABLE.  FreeBSD < 10.0 offers no internet connectivity at all.

Now I have to save this message, shutdown and boot into NetBSD to send it.

I also use NetBSD to update src, ports and doc trees with subversion.

Tom