Difference between revisions of "Rtl8187 wireless"

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(Method 4: Using Ndiswrapper)
(contained only general information, the driver itself "should just work" or the general informations are enough)
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{{i18n|Rtl8187 wireless}}
#REDIRECT [[Wireless Setup]]
[[Category:Wireless Networking (English)]]
This page describes how to get the '''rtl8187''' wifi-driver working
Note: The rtl8187 driver is in the kernel (thus the driver comes with the kernel26 package)
The rtl8187 chip is made for usb-cards/dongles
It supports 802.11(a)/b/g and the following encryptions:  WEP, WPA and WPA2
The driver's source is released under the GPL
=Using and testing the driver/Troubleshooting=
Make sure that you have loaded the rtl8187 module with
modprobe rtl8187
Then run
dmesg | grep rtl8187
You should see some output like this <pre> usbcore: registered new interface driver rtl8187 </pre>
If you see that line everything should be OK
== Using the driver ==
If everything is right, you should have two new interfaces: wlan0 and wmaster0
If you do not see wlan0 just run
ifconfig wlan0 up
To list all available wifi-networks just run
iwlist wlan0 scan
For more information about configuring your wifi-network see here: [http://wiki.archlinux.org/index.php/Wireless_Setup#Setup_and_Boot http://wiki.archlinux.org/index.php/Wireless_Setup#Setup_and_Boot]
== What to do if your connection always times out? ==
=== Method 1: Lowering the transfer rate manually ===
The solution can be found in this thread: http://bbs.archlinux.org/viewtopic.php?pid=299642
Just set the rate to 5.5
iwconfig wlan0 rate 5.5M auto
Actually this worked for a while but it would still start revving out, so making the last
item "fixed" ensures it does not spin.  Btw. If your wireless card has already gone into
meltdown issuing this command will get it working again.
iwconfig wlan0 rate 5.5M fixed
I have also tried setting this in the IWOPTS, but it does not seem to be taking, so now what I do until I get this sorted out is:
  netcfg2 -c <your wireless profile>
  iwconfig wlan0 rate 5.5M fixed
And then it never times out (at least for me)
Found the $POST_UP option, so appending this to your profile config
file, sets the rate correctly when using the netcfg tools.
    POST_UP="iwconfig wlan0 rate 5.5M fixed"
Actually for my card setting the rate higher still works, so now this line looks like:
    POST_UP="iwconfig wlan0 rate 12M fixed"
Now calling;
    netfcg2 -c <wireless profile>
and choosing your profile works without extra commands.
=== Method 2: Lowering the txpower ===
You can try lowering the transmit power as well. This may save power as well:
iwconfig wlan0 txrate 5
or even as low as 1. Valid settings are from 0 to 20 or auto for the stock kernel driver.
=== Method 3: Aircrack-ng patched driver ===
{{Note|Note that this driver only works on kernel26}}
Another method that works for some users are the Aircrack-ng patches for the rtl8187 driver. This driver can be installed by the [http://aur.archlinux.org/packages.php?ID=15375 rtl8187-ng] package from [[AUR]].
Since the above package is outdated as of 11/08/11 you can try installing the [https://aur.archlinux.org/packages.php?ID=51272 linux-aircrack] patched kernel instead from [[AUR]] or the precompiled package from the [https://wiki.archlinux.org/index.php/Unofficial_User_Repositories adslgr32] unofficial repository
=== Method 4: Using Ndiswrapper ===
If everything else fails, then you are left with using Ndiswrapper. Ndiswrapper takes Windows RTL8187 drivers and uses them to enable your card.
1. Install ndiswrapper:
pacman -S ndiswrapper
2. Download the Windows drivers:
wget [http://db.tt/4NB0HbF6 http://db.tt/4NB0HbF6]
3. Extract the drivers:
unzip ndiswrapper.zip
4. If you have the rtl8187 module loaded, then do this:
modprobe -r rtl8187
5. Install the driver:
If you have any previous drivers installed that may or may not have failed remove them:
ndiswrapper -r net8187b
Install the new drivers:
ndiswrapper -i ./ndiswrapper/net8187b.inf
ndiswrapper -m
Make sure that it is installed:
ndiswrapper -l
Try now loading the module
modprobe ndiswrapper
Kernel log shouldn't indicate any errors:
dmesg | tail
If all steps are successful it should be now visible in the iwconfig interfaces list:
6. Add ndiswrapper to the MODULES array in /etc/rc.conf
MODULES=(... powernow-k7 ndiswrapper ...)
7. Blacklist '''rtl8187''' in /etc/modprobe.conf.d/rtl8187.conf
blacklist rtl8187
Proceed to connect as you normally would.
=Misc Links=
*[http://rtl-wifi.sourceforge.net/ Project-page of the rtl-wifi driver project]
*[http://aircrack-ng.org/doku.php?id=r8187 Aircrack-ng information and tweaks for rtl8187 chips]

Revision as of 22:30, 3 August 2013

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