Raspberry Pi Forums

Posted: **Fri Apr 17, 2015 6:03 pm**

Model: Raspberry Pi 2
OS: Raspbian 3.18.7-v7+ (the latest)
dmesg:
[ 4.419683] usb 1-1.5: Product: 802.11n NIC
[ 4.426241] usb 1-1.5: Manufacturer: Realtek
[ 4.432859] usb 1-1.5: SerialNumber: 00E04C0001
[ 4.774418] random: nonblocking pool is initialized
[ 4.870391] usbcore: registered new interface driver uas
[ 4.955725] r8188eu: module is from the staging directory, the quality is unknown, you have been warned.
[ 4.980114] Chip Version Info: CHIP_8188E_Normal_Chip_TSMC_D_CUT_1T1R_RomVer(0)
[ 5.030313] usbcore: registered new interface driver r8188eu

lsmod: r8188eu 435113 0

everything seems fine but i don't see the device from 'lsusb' or 'ifconfig -a' (the device didn't show up in the usb list and there is no wlan0). how can the device is probed and driver installed in dmesg but not in lsusb?

any suggestion would be greatly appreciated.

Posted: **Fri Apr 17, 2015 6:47 pm**

dogmarcopolo wrote:Model: Raspberry Pi 2
OS: Raspbian 3.18.7-v7+ (the latest)
dmesg:
[ 4.419683] usb 1-1.5: Product: 802.11n NIC
[ 4.426241] usb 1-1.5: Manufacturer: Realtek
[ 4.432859] usb 1-1.5: SerialNumber: 00E04C0001
[ 4.774418] random: nonblocking pool is initialized
[ 4.870391] usbcore: registered new interface driver uas
[ 4.955725] r8188eu: module is from the staging directory, the quality is unknown, you have been warned.
[ 4.980114] Chip Version Info: CHIP_8188E_Normal_Chip_TSMC_D_CUT_1T1R_RomVer(0)
[ 5.030313] usbcore: registered new interface driver r8188eu

lsmod: r8188eu 435113 0

everything seems fine but i don't see the device from 'lsusb' or 'ifconfig -a' (the device didn't show up in the usb list and there is no wlan0). how can the device is probed and driver installed in dmesg but not in lsusb?

any suggestion would be greatly appreciated.

If the device does not show in lsusb then I'm surprised the module r8188eu is showing in lsmod. The wifi module should show in lsusb even if the driver is not installed.

The module shown loaded with command lsmod, r8188eu, requires a separate firmware file for the wifi adapter to work. I don't think that it is currently included in the linux image so check if file rtl8188eufw.bin is in directory /lib/firmware/rtlwifi. If you do not have the firmware file you should be able to download and install it in the correct directory with the command

Code: Select all

sudo wget https://github.com/lwfinger/rtl8188eu/raw/master/rtl8188eufw.bin -O /lib/firmware/rtlwifi/rtl8188eufw.bin

. Reboot after installing the firmware.

Can you post the output from command lsusb to see what it shows.

MrEngman

Posted: **Sat Apr 18, 2015 12:01 am**

Thanks! that is the exact problem. Now wireless is working, appreciated!

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