Decided to reduce the clutter in the house and replace a wired connection with a wireless one on my wife's system using USB network device Rosewill RNX-X1. I can see and connect to unprotected network, but WPA2 authentication repeatedly fails.

RNX-X1 works on other systems (including TV); also have 2 of 'em and tried each.

Worth noting that I recently switched from Comcast to CenturyLink and so switched routers. The system connected successfully to previous router (Linksys EA4500) using WPA2. Would think it is the router (Actiontec C1000A) but all other devices (TV, iPad, Windows, Blackberry, and Squeezebox) connect ok.

Would appreciate some diagnostic guidance and insight (phrased for a newbie!)

Tests to date:

sudo lshw -class network

    *-network               
   description: Ethernet interface 
   product: RTL8111/8168B PCI Express Gigabit Ethernet controller 
   vendor: Realtek Semiconductor Co., Ltd. 
   physical id: 0 
   bus info: pci@0000:03:00.0 
   logical name: eth0 
   version: 01 
   serial: 00:e0:4d:30:40:a1 
   size: 10Mbit/s 
   capacity: 1Gbit/s 
   width: 64 bits 
   clock: 33MHz 
   capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation 
   configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=N/A latency=0 link=no multicast=yes port=MII speed=10Mbit/s 
   resources: irq:47 ioport:ac00(size=256) memory:fdcff000-fdcfffff memory:fdb00000-fdb1ffff 
    *-network 
   description: Wireless interface 
   physical id: 1 
   bus info: usb@1:2 
   logical name: wlan1 
   serial: 00:02:6f:bd:30:a0 
   capabilities: ethernet physical wireless 
   configuration: broadcast=yes driver=rt2800usb driverversion=3.2.0-31-generic firmware=0.29 link=no multicast=yes wireless=IEEE 802.11bgn 

sudo lspci -v

    00:00.0 RAM memory: NVIDIA Corporation MCP67 Memory Controller (rev a2) 
Subsystem: Biostar Microtech Int'l Corp Device 3409 
Flags: bus master, 66MHz, fast devsel, latency 0 
Capabilities: [44] HyperTransport: Slave or Primary Interface 
Capabilities: [dc] HyperTransport: MSI Mapping Enable+ Fixed- 

    00:01.0 ISA bridge: NVIDIA Corporation MCP67 ISA Bridge (rev a2) 
Subsystem: Biostar Microtech Int'l Corp Device 3409 
Flags: bus master, 66MHz, fast devsel, latency 0 

    00:01.1 SMBus: NVIDIA Corporation MCP67 SMBus (rev a2) 
Subsystem: Biostar Microtech Int'l Corp Device 3409 
Flags: 66MHz, fast devsel, IRQ 11 
I/O ports at fc00 [size=64] 
I/O ports at 1c00 [size=64] 
I/O ports at 1c40 [size=64] 
Capabilities: [44] Power Management version 2 
Kernel driver in use: nForce2_smbus 
Kernel modules: i2c-nforce2 

    00:01.2 RAM memory: NVIDIA Corporation MCP67 Memory Controller (rev a2) 
Flags: 66MHz, fast devsel 

    00:02.0 USB controller: NVIDIA Corporation MCP67 OHCI USB 1.1 Controller (rev a2) (prog-if 10 [OHCI]) 
Subsystem: Biostar Microtech Int'l Corp Device 3409 
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 23 
Memory at fe02f000 (32-bit, non-prefetchable) [size=4K] 
Capabilities: [44] Power Management version 2 
Kernel driver in use: ohci_hcd 

    00:02.1 USB controller: NVIDIA Corporation MCP67 EHCI USB 2.0 Controller (rev a2) (prog-if 20 [EHCI]) 
Subsystem: Biostar Microtech Int'l Corp Device 3409 
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 22 
Memory at fe02e000 (32-bit, non-prefetchable) [size=256] 
Capabilities: [44] Debug port: BAR=1 offset=0098 
Capabilities: [80] Power Management version 2 
Kernel driver in use: ehci_hcd 

    00:04.0 USB controller: NVIDIA Corporation MCP67 OHCI USB 1.1 Controller (rev a2) (prog-if 10 [OHCI]) 
Subsystem: Biostar Microtech Int'l Corp Device 3409 
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 21 
Memory at fe02d000 (32-bit, non-prefetchable) [size=4K] 
Capabilities: [44] Power Management version 2 
Kernel driver in use: ohci_hcd 

    00:04.1 USB controller: NVIDIA Corporation MCP67 EHCI USB 2.0 Controller (rev a2) (prog-if 20 [EHCI]) 
Subsystem: Biostar Microtech Int'l Corp Device 3409 
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 20 
Memory at fe02c000 (32-bit, non-prefetchable) [size=256] 
Capabilities: [44] Debug port: BAR=1 offset=0098 
Capabilities: [80] Power Management version 2 
Kernel driver in use: ehci_hcd 

    00:06.0 IDE interface: NVIDIA Corporation MCP67 IDE Controller (rev a1) (prog-if 8a [Master SecP PriP]) 
Subsystem: Biostar Microtech Int'l Corp Device 3409 
Flags: bus master, 66MHz, fast devsel, latency 0 
[virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8] 
[virtual] Memory at 000003f0 (type 3, non-prefetchable) [size=1] 
[virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8] 
[virtual] Memory at 00000370 (type 3, non-prefetchable) [size=1] 
I/O ports at f000 [size=16] 
Capabilities: [44] Power Management version 2 
Kernel driver in use: pata_amd 
Kernel modules: pata_amd 

    00:07.0 Audio device: NVIDIA Corporation MCP67 High Definition Audio (rev a1) 
Subsystem: Biostar Microtech Int'l Corp Device 820c 
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 22 
Memory at fe024000 (32-bit, non-prefetchable) [size=16K] 
Capabilities: [44] Power Management version 2 
Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+ 
Capabilities: [6c] HyperTransport: MSI Mapping Enable- Fixed+ 
Kernel driver in use: snd_hda_intel 
Kernel modules: snd-hda-intel 

    00:08.0 PCI bridge: NVIDIA Corporation MCP67 PCI Bridge (rev a2) (prog-if 01 [Subtractive decode]) 
Flags: bus master, 66MHz, fast devsel, latency 0 
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32 
I/O behind bridge: 0000c000-0000cfff 
Memory behind bridge: fdf00000-fdffffff 
Prefetchable memory behind bridge: fd000000-fd0fffff 
Capabilities: [b8] Subsystem: NVIDIA Corporation Device cb84 
Capabilities: [8c] HyperTransport: MSI Mapping Enable- Fixed- 

    00:09.0 IDE interface: NVIDIA Corporation MCP67 AHCI Controller (rev a2) (prog-if 85 [Master SecO PriO]) 
Subsystem: Biostar Microtech Int'l Corp Device 5407 
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 23 
I/O ports at 09f0 [size=8] 
I/O ports at 0bf0 [size=4] 
I/O ports at 0970 [size=8] 
I/O ports at 0b70 [size=4] 
I/O ports at dc00 [size=16] 
Memory at fe02a000 (32-bit, non-prefetchable) [size=8K] 
Capabilities: [44] Power Management version 2 
Capabilities: [8c] SATA HBA v1.0 
Capabilities: [b0] MSI: Enable- Count=1/8 Maskable- 64bit+ 
Capabilities: [cc] HyperTransport: MSI Mapping Enable- Fixed+ 
Kernel driver in use: ahci 

    00:0b.0 PCI bridge: NVIDIA Corporation MCP67 PCI Express Bridge (rev a2) (prog-if 00 [Normal decode]) 
Flags: bus master, fast devsel, latency 0 
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0 
I/O behind bridge: 0000b000-0000bfff 
Memory behind bridge: fde00000-fdefffff 
Prefetchable memory behind bridge: 00000000fdd00000-00000000fddfffff 
Capabilities: [40] Subsystem: NVIDIA Corporation Device 0000 
Capabilities: [48] Power Management version 2 
Capabilities: [50] MSI: Enable+ Count=1/2 Maskable- 64bit+ 
Capabilities: [60] HyperTransport: MSI Mapping Enable- Fixed- 
Capabilities: [80] Express Root Port (Slot+), MSI 00 
Capabilities: [100] Virtual Channel 
Kernel driver in use: pcieport 
Kernel modules: shpchp 

    00:0c.0 PCI bridge: NVIDIA Corporation MCP67 PCI Express Bridge (rev a2) (prog-if 00 [Normal decode]) 
Flags: bus master, fast devsel, latency 0 
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0 
I/O behind bridge: 0000a000-0000afff 
Memory behind bridge: fdc00000-fdcfffff 
Prefetchable memory behind bridge: 00000000fdb00000-00000000fdbfffff 
Capabilities: [40] Subsystem: NVIDIA Corporation Device 0000 
Capabilities: [48] Power Management version 2 
Capabilities: [50] MSI: Enable+ Count=1/2 Maskable- 64bit+ 
Capabilities: [60] HyperTransport: MSI Mapping Enable- Fixed- 
Capabilities: [80] Express Root Port (Slot+), MSI 00 
Capabilities: [100] Virtual Channel 
Kernel driver in use: pcieport 
Kernel modules: shpchp 

    00:0d.0 PCI bridge: NVIDIA Corporation MCP67 PCI Express Bridge (rev a2) (prog-if 00 [Normal decode]) 
Flags: bus master, fast devsel, latency 0 
Bus: primary=00, secondary=04, subordinate=04, sec-latency=0 
I/O behind bridge: 00009000-00009fff 
Memory behind bridge: fda00000-fdafffff 
Prefetchable memory behind bridge: 00000000fd900000-00000000fd9fffff 
Capabilities: [40] Subsystem: NVIDIA Corporation Device 0000 
Capabilities: [48] Power Management version 2 
Capabilities: [50] MSI: Enable+ Count=1/2 Maskable- 64bit+ 
Capabilities: [60] HyperTransport: MSI Mapping Enable- Fixed- 
Capabilities: [80] Express Root Port (Slot+), MSI 00 
Capabilities: [100] Virtual Channel 
Kernel driver in use: pcieport 
Kernel modules: shpchp 

    00:0e.0 PCI bridge: NVIDIA Corporation MCP67 PCI Express Bridge (rev a2) (prog-if 00 [Normal decode]) 
Flags: bus master, fast devsel, latency 0 
Bus: primary=00, secondary=05, subordinate=05, sec-latency=0 
I/O behind bridge: 00008000-00008fff 
Memory behind bridge: fd800000-fd8fffff 
Prefetchable memory behind bridge: 00000000fd700000-00000000fd7fffff 
Capabilities: [40] Subsystem: NVIDIA Corporation Device 0000 
Capabilities: [48] Power Management version 2 
Capabilities: [50] MSI: Enable+ Count=1/2 Maskable- 64bit+ 
Capabilities: [60] HyperTransport: MSI Mapping Enable- Fixed- 
Capabilities: [80] Express Root Port (Slot+), MSI 00 
Capabilities: [100] Virtual Channel 
Kernel driver in use: pcieport 
Kernel modules: shpchp 

    00:0f.0 PCI bridge: NVIDIA Corporation MCP67 PCI Express Bridge (rev a2) (prog-if 00 [Normal decode]) 
Flags: bus master, fast devsel, latency 0 
Bus: primary=00, secondary=06, subordinate=06, sec-latency=0 
I/O behind bridge: 00007000-00007fff 
Memory behind bridge: fd600000-fd6fffff 
Prefetchable memory behind bridge: 00000000fd500000-00000000fd5fffff 
Capabilities: [40] Subsystem: NVIDIA Corporation Device 0000 
Capabilities: [48] Power Management version 2 
Capabilities: [50] MSI: Enable+ Count=1/2 Maskable- 64bit+ 
Capabilities: [60] HyperTransport: MSI Mapping Enable- Fixed- 
Capabilities: [80] Express Root Port (Slot+), MSI 00 
Capabilities: [100] Virtual Channel 
Kernel driver in use: pcieport 
Kernel modules: shpchp 

    00:10.0 PCI bridge: NVIDIA Corporation MCP67 PCI Express Bridge (rev a2) (prog-if 00 [Normal decode]) 
Flags: bus master, fast devsel, latency 0 
Bus: primary=00, secondary=07, subordinate=07, sec-latency=0 
I/O behind bridge: 00006000-00006fff 
Memory behind bridge: fd400000-fd4fffff 
Prefetchable memory behind bridge: 00000000fd300000-00000000fd3fffff 
Capabilities: [40] Subsystem: NVIDIA Corporation Device 0000 
Capabilities: [48] Power Management version 2 
Capabilities: [50] MSI: Enable+ Count=1/2 Maskable- 64bit+ 
Capabilities: [60] HyperTransport: MSI Mapping Enable- Fixed- 
Capabilities: [80] Express Root Port (Slot+), MSI 00 
Capabilities: [100] Virtual Channel 
Kernel driver in use: pcieport 
Kernel modules: shpchp 

    00:11.0 PCI bridge: NVIDIA Corporation MCP67 PCI Express Bridge (rev a2) (prog-if 00 [Normal decode]) 
Flags: bus master, fast devsel, latency 0 
Bus: primary=00, secondary=08, subordinate=08, sec-latency=0 
I/O behind bridge: 00005000-00005fff 
Memory behind bridge: fd200000-fd2fffff 
Prefetchable memory behind bridge: 00000000fd100000-00000000fd1fffff 
Capabilities: [40] Subsystem: NVIDIA Corporation Device 0000 
Capabilities: [48] Power Management version 2 
Capabilities: [50] MSI: Enable+ Count=1/2 Maskable- 64bit+ 
Capabilities: [60] HyperTransport: MSI Mapping Enable- Fixed- 
Capabilities: [80] Express Root Port (Slot+), MSI 00 
Capabilities: [100] Virtual Channel 
Kernel driver in use: pcieport 
Kernel modules: shpchp 

    00:12.0 VGA compatible controller: NVIDIA Corporation C68 [GeForce 7050 PV / nForce 630a] (rev a2) (prog-if 00 [VGA controller]) 
Subsystem: Biostar Microtech Int'l Corp Device 1406 
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 21 
Memory at fb000000 (32-bit, non-prefetchable) [size=16M] 
Memory at e0000000 (64-bit, prefetchable) [size=256M] 
Memory at fc000000 (64-bit, non-prefetchable) [size=16M] 
[virtual] Expansion ROM at 80000000 [disabled] [size=128K] 
Capabilities: [48] Power Management version 2 
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+ 
Kernel driver in use: nvidia 
Kernel modules: nvidia_current, nouveau, nvidiafb 

    00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 
Flags: fast devsel 
Capabilities: [80] HyperTransport: Host or Secondary Interface 

    00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 
Flags: fast devsel 

    00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 
Flags: fast devsel 

    00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 
Flags: fast devsel 
Capabilities: [f0] Secure device <?> 
Kernel driver in use: k8temp 
Kernel modules: k8temp 

    03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01) 
Subsystem: Biostar Microtech Int'l Corp Device 2305 
Flags: bus master, fast devsel, latency 0, IRQ 47 
I/O ports at ac00 [size=256] 
Memory at fdcff000 (64-bit, non-prefetchable) [size=4K] 
[virtual] Expansion ROM at fdb00000 [disabled] [size=128K] 
Capabilities: [40] Power Management version 2 
Capabilities: [48] Vital Product Data 
Capabilities: [50] MSI: Enable+ Count=1/2 Maskable- 64bit+ 
Capabilities: [60] Express Endpoint, MSI 00 
Capabilities: [84] Vendor Specific Information: Len=4c <?> 
Capabilities: [100] Advanced Error Reporting 
Capabilities: [12c] Virtual Channel 
Capabilities: [148] Device Serial Number 32-00-00-00-10-ec-81-68 
Capabilities: [154] Power Budgeting <?> 
Kernel driver in use: r8169 
Kernel modules: r8169 

sudo rfkill list all

    2: phy2: Wireless LAN 
Soft blocked: no 
Hard blocked: no