Showing posts with label udev. Show all posts
Showing posts with label udev. Show all posts

Sunday, October 11, 2015

How to install D-Link DWA-123 Wireless N 150 adapter in debian

Today I got myself a new wireless usb device. Pricing for D-Link DWA-123 wireless N 150 is very affordable and only at 17MYR (01 september 2015) in local computer store. So I got myself a unit and try out, and it's working fine after more than ten days. I will share with you how do I install this unit in linux debian.

If you are using kernel 4.0 or above, the module should come together with the kernel. You can identify below and you plug the device into the usb port.

 root@localhost:~# modinfo r8188eu  
 filename:    /lib/modules/4.0.0-2-amd64/kernel/drivers/staging/rtl8188eu/r8188eu.ko  
 version:    v4.1.4_6773.20130222  
 author:     Realtek Semiconductor Corp.  
 description:  Realtek Wireless Lan Driver  
 license:    GPL  
 srcversion:   A3DA328AE8853D31D90212F  
 alias:     usb:v0DF6p0076d*dc*dsc*dp*ic*isc*ip*in*  
 alias:     usb:v2001p3311d*dc*dsc*dp*ic*isc*ip*in*  
 alias:     usb:v2001p3310d*dc*dsc*dp*ic*isc*ip*in*  
 alias:     usb:v2001p330Fd*dc*dsc*dp*ic*isc*ip*in*  
 alias:     usb:v07B8p8179d*dc*dsc*dp*ic*isc*ip*in*  
 alias:     usb:v056Ep4008d*dc*dsc*dp*ic*isc*ip*in*  
 alias:     usb:v0BDAp0179d*dc*dsc*dp*ic*isc*ip*in*  
 alias:     usb:v0BDAp8179d*dc*dsc*dp*ic*isc*ip*in*  
 depends:    usbcore  
 staging:    Y  
 intree:     Y  
 vermagic:    4.0.0-2-amd64 SMP mod_unload modversions   
 parm:      rtw_ips_mode:The default IPS mode (int)  
 parm:      ifname:The default name to allocate for first interface (charp)  
 parm:      if2name:The default name to allocate for second interface (charp)  
 parm:      rtw_initmac:charp  
 parm:      rtw_channel_plan:int  
 parm:      rtw_chip_version:int  
 parm:      rtw_rfintfs:int  
 parm:      rtw_lbkmode:int  
 parm:      rtw_network_mode:int  
 parm:      rtw_channel:int  
 parm:      rtw_wmm_enable:int  
 parm:      rtw_vrtl_carrier_sense:int  
 parm:      rtw_vcs_type:int  
 parm:      rtw_busy_thresh:int  
 parm:      rtw_ht_enable:int  
 parm:      rtw_cbw40_enable:int  
 parm:      rtw_ampdu_enable:int  
 parm:      rtw_rx_stbc:int  
 parm:      rtw_ampdu_amsdu:int  
 parm:      rtw_lowrate_two_xmit:int  
 parm:      rtw_rf_config:int  
 parm:      rtw_power_mgnt:int  
 parm:      rtw_smart_ps:int  
 parm:      rtw_low_power:int  
 parm:      rtw_wifi_spec:int  
 parm:      rtw_antdiv_cfg:int  
 parm:      rtw_antdiv_type:int  
 parm:      rtw_enusbss:int  
 parm:      rtw_hwpdn_mode:int  
 parm:      rtw_hwpwrp_detect:int  
 parm:      rtw_hw_wps_pbc:int  
 parm:      rtw_max_roaming_times:The max roaming times to try (uint)  
 parm:      rtw_fw_iol:FW IOL (int)  
 parm:      rtw_mc2u_disable:int  
 parm:      rtw_80211d:Enable 802.11d mechanism (int)  
 parm:      rtw_notch_filter:0:Disable, 1:Enable, 2:Enable only for P2P (uint)  
 parm:      debug:Set debug level (1-9) (default 1) (int)  
 root@localhost:~# dpkg -S /lib/modules/4.0.0-2-amd64/kernel/drivers/staging/rtl8188eu/r8188eu.ko  
 linux-image-4.0.0-2-amd64: /lib/modules/4.0.0-2-amd64/kernel/drivers/staging/rtl8188eu/r8188eu.ko  

If you get the following message in your syslog,

 Sep 1 19:12:33 localhost kernel: [ 385.525522] r8188eu 1- firmware: failed to load rtlwifi/rtl8188eufw.bin (-2)  
 Sep 1 19:12:33 localhost kernel: [ 385.525530] r8188eu 1- Direct firmware load for rtlwifi/rtl8188eufw.bin failed with error -2  
 Sep 1 19:12:33 localhost kernel: [ 385.525534] r8188eu 1- Firmware rtlwifi/rtl8188eufw.bin not available  
 Sep 1 19:12:33 localhost kernel: [ 385.525539] MAC Address = 00:00:00:00:00:00  

What you need to do next is to install the firmware. The firmware is in the repository and you can install as easy as apt-get.

 root@localhost:~# apt-get install firmware-realtek  

Now the userspace application should be able to identify the device correctly. I am using gnome so, it is detected as USB Wi-FI. Note that I have an existing pci wifi as shown in the screenshot below.

Try out to device to retrieve the IP address etc. If you get your wireless to a funky name such as wlxc412f52da87d , then you can create a rule in the udev configuration file.

 # cat /etc/udev/rules.d/70-persistent-net.rules  
 # This file was automatically generated by the /lib/udev/write_net_rules  
 # program, run by the persistent-net-generator.rules rules file.  
 # You can modify it, as long as you keep each rule on a single  
 # line, and change only the value of the NAME= key.  
 # PCI device 0x0000:0x0000 (atl1c)  
 SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:00:00:00:00:00", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"  
 # PCI device 0x0000:0x0000 (brcm80211)  
 SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:00:00:00:00:0", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"  
 # USB device 0x0000:0x0000 (r8188eu)  
 SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:00:00:00:00:00", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan1"  

As you can see above, PCI device my existing device and you should add another line similar to the above. You need to replace ATTR{address} value to your device mac address. When the operating system bring up this device, it will be renamed to wlan1 instead of a random interface name next time.