Help or bug? RTL8192CU driver.

[D. Stussy]

I am having trouble with using the RTL8192CU 802.11n USB network chip.  I have 
verified that I have the correct firmware (the size is 16014 bytes and the MD5 
signature matches the one posted in various forums as correct).  The kernel 
tries to load it, but after about 20 seconds, a message indicating that it was 
not available appears in my kernel log.  No other reason is given.

As the problem occurs on a x86-64-bit system, is there a problem with loading 
firmware into the device on those systems?  Or might I have a buggy network 
device?


USB:  Bus 001 Device 003: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 
802.11n WLAN

syslog/dmesg:
cfg80211: Calling CRDA to update world regulatory domain
rtl8192cu 1-2:1.0: usb_probe_interface
rtl8192cu 1-2:1.0: usb_probe_interface - got id
rtl8192cu: Chip version 0x10
rtl8192cu: MAC address: 48:02:2a:8f:de:0b
rtl8192cu: Board Type 0
rtlwifi: rx_max_size 15360, rx_urb_num 8, in_ep 1

...  [regulatory messages indicating available frequencies] ...

rtl8192cu: Loading firmware rtlwifi/rtl8192cufw.bin
cfg80211: Pending regulatory request, waiting for it to be processed...
usbcore: registered new interface driver rtl8192cu
  [pause for about 20 seconds]
rtlwifi: Firmware rtlwifi/rtl8192cufw.bin not available

Yet, the file is there:
-rw-r--r-- 2 root root 16014 Apr  1  2012 /lib/firmware/rtlwifi/rtl8192cufw.bin

What else should I look for or do?


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