Can not get Realtek RTL8188CU USB adapter to work on 10.2-BETA1 laptop

[Kevin Lo]

Try running kldload urtwn-rtl8192cfwT or adding this to /boot/loader.conf:

urtwn-rtl8192cfwT_load="YES"

The latter will require a reboot to take effect.

	Kevin

On Fri, Jul 17, 2015 at 11:22:28AM -0400, William Bulley wrote:
> 
> I have a new laptop with an Intel core i7-5600U CPU running 10.2-BETA1 FreeBSD.
> 
> I tried following the directions here:
> 
>    https://vzaigrin.wordpress.com/2014/04/14/how-to-setup-usb-wifi-on-raspberry-pi-with-freebsd/
> 
> and I tried the directions in the "% man 4 urtwn" man page:
> 
>      To compile this driver into the kernel, place the following lines in your
>      kernel configuration file:
> 
>            device ehci
>            device uhci
>            device ohci
>            device usb
>            device urtwn
>            device wlan
> 
>      Alternatively, to load the driver as a module at boot time, place the
>      following line in loader.conf(5):
> 
>            if_urtwn_load="YES"
> 
>      In both cases, place the following line in loader.conf(5) to acknowledge
>      the firmware license (see below):
> 
>            legal.realtek.license_ack=1
> 
>   [[I did both: rebuilt kernel AND added two lines to the /boot/loader.conf file]]
> 
>      and
> 
>      This driver requires the firmware built with the urtwnfw module to work.
>      For the loaded firmware to be enabled for use the license at
>      /usr/share/doc/legal/realtek must be agreed by adding the following line
>      to loader.conf(5):
> 
>            legal.realtek.license_ack=1
> 
>      and
> 
>      The urtwn driver supports Realtek RTL8188CU/RTL8188RU/RTL8188EU/RTL8192CU
>      based USB IEEE 802.11b/g/n wireless network adapters, including:
> 
>            Edimax EW-7811Un   [[which is the product I have]]
> 
> Given that I have the urtwn(4) driver built into the kernel, and that I have
> those two lines in the /boot/loader.conf file, it isn't surprising that the
> laptop seems to detect the USB adapter at boot time:
> 
>    unix% dmesg | grep -i urtwn
>    urtwn0: <vendor 0x7392 product 0x7811, class 0/0, rev 2.00/2.00, addr 1> on usbus0
>    urtwn0: MAC/BB RTL8188CUS, RF 6052 1T1R
>    urtwn0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
>    urtwn0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
> 
> However, this error occurs in /var/log/messages when I try to use it:
> 
>    urtwn-rtl8192cfwT: You need to read the LICENSE file in /usr/share/doc/legal/realtek/.
>    urtwn-rtl8192cfwT: If you agree with the license, set legal.realtek.license_ack=1 in /boot/loader.conf.
>    module_register_init: MOD_LOAD (urtwn-rtl8192cfwT_fw, 0xc2aa24f0, 0) error 1
>    urtwn-rtl8192cfwT: could not load firmware image, error 8
>    urtwn0: failed loadfirmware of file urtwn-rtl8192cfwT
> 
> There is in fact, the /usr/share/doc/legal/realtek license file at that
> location.  But the urtwn(4) man page also says this:
> 
>    DIAGNOSTICS
>      urtwn%d: error %d, could not read firmware %s  For some reason, the
>      driver was unable to read the microcode file from the filesystem.  The
>      file might be missing or corrupted.
> 
> When I issue this command as root "# ifconfig wlan0 create wlandev urtwn0"
> I get this error:
> 
>    ifconfig: create: bad value
> 
> The "could not read firmware" sub-string from the man page is close enough
> to the generated error sub-string when I try to use the USB adapter:
> 
>    "could not load firmware image"
> 
> to make me think the microcode file is missing or corrupted.
> 
> These files are in the /usr/src/sys/contrib/dev/urtwn directory:
> 
> unix% ls -l /usr/src/sys/contrib/dev/urtwn
> -rw-r--r--   1 root  wheel   2115 Jul 12 09:22 LICENSE
> -rw-r--r--   1 root  wheel  19198 Jul 12 09:22 urtwn-rtl8188eufw.fw.uu
> -rw-r--r--   1 root  wheel  21765 Jul 12 09:22 urtwn-rtl8192cfwT.fw.uu
> -rw-r--r--   1 root  wheel  21765 Jul 12 09:22 urtwn-rtl8192cfwU.fw.uu
> 
> Since the adapter reports itself to be a RTL8188CUS, then the first of
> the three firmware/microcode files above should be loaded, yet the error
> message reproduced above is looking for the rtl8192cfwT firmware file.
> But even that file is present -- the second of the above three files.
> 
> Does anyone know how to make this wi-fi adapter work in 10.2BETA1 on
> this laptop?  It seems to work on the Raspberry Pi (see the URL above)
> on an earlier 10.x system, so it ought to work today on 10.2BETA1 one
> might surmise.  Any thoughts on how to make this adapter work?  Thanks.
> 
> Regards,
> 
> web...
> 
> -- 
> 
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