Wifi Not working in Knoppix 7.0.5

[vlct]

Hi, I have Knoppix 7.0.5 DVD on USB stick, and USB Wireless N 802.11n/g/b adapter.

Knoppix's can see my wireless network, the box comes up to put the wifi pass in then tries to connect for a while, but the box comes back up to connect again but never connects.

I have the CD with the drivers and there is a folder on there with drivers for Linux if that's of any use??

Also I am new to Linux based op systems

[klaus2008]

Hi!

You did not write enough about your USB WLAN adapter. I think you should plug in your USB wireless adapter and open an LXTerminal. Then issue the command

lsusb

and tell us all about the wireless adapter.

[vlct]

This is all I got using LXTerminal,

oppix@Microknoppix:~$ lsusb
Bus 001 Device 002: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter

Here is more info from web site,

Specifications

Wireless Standards
IEEE 802.11n
IEEE 802.11g
IEEE 802.11b
Host Interface
High speed USB2.0/1.1 interface
Data Rate

802.11n: up to 150Mbps (downlink) and 150Mbps (uplink)
802.11g: 54 / 48 / 36 / 24 / 18/ 12 / 9 / 6 Mbps auto fallback
802.11b: 11 / 5.5 / 2 / 1 Mbps auto fallback

Frequency Band
2.4GHz ISM (Industrial Scientific Medical) Band
Chipset
Realtek 8188CUS
RF Frequency
2412 ~ 2462 MHz (North America)
2412 ~ 2472 MHz (Europe)
2412 ~ 2484 MHz (Japan)
Radio Channel
1 ~ 14 channels (Universal Domain Selection)
Range Coverage
Up to 3 times farther range than 802.11g
Antenna type
Integrated Antenna
Roaming
Full mobility and seamless roaming from cell to cell
RF Output Power
13 - 17 dBm (Typical)
Modulation
11n: BPSK, QPSK, 16QAM, 64QAM with OFDM
11g: BPSK, QPSK, 16QAM, 64QAM, OFDM
11b: DQPSK, DBPSK, DSSS, CCK
Data Security
64/128-bit WEP Encryption
WPA, WPA-PSK, WPA2, WPA2-PSK. TKIP/AES
Network
Auto-switch to use 802.11n or 802.11g or 802.11b mode
Supports Ad-Hoc, Infrastructure WLAN network
Wireless roaming
Data rate auto fall-back under noisy environment or longer range distance
Site Survey with Profile function
Configuration & Management
Plug-and-Play setup and installation
Management Utility supports 2000 / XP/ Vista / 7
Media Access Control
CSMA/CA with ACK

Operating System
Windows XP 32/64-bit, Vista 32/64-bit，7
Linux and MAC OS X

[klaus2008]

It is a well known bug. Look at https://bugs.launchpad.net/ubuntu/+s...x/+bug/1030858

I use an wireless LAN adapter by Edimax with the same chipset. In post #73 of the thread mentioned above you will find a link for the latest Linux driver. If you are curious you can install this driver and boot up your system using the additional cheat code 'modprobe.blacklist=rtl8192cu'.

[vlct]

Ok, I have got the updated drivers for this.

So how do I go about installing this driver??

And also the "additional cheat code 'modprobe.blacklist=rtl8192cu", how do I boot up the system using that?? Where do I type that??

Like I said, I am new to Linux based op systems.

[klaus2008]

In the following I suppose you downloaded the driver archive file to you desktop.

You have to open an LXTerminal, change to the directory with the driver archive file and unzip the file. Issue

cd /home/knoppix/Desktop
unzip RTL8192xC_USB_linux_v3.4.4_4749.20121105.zip

The files will be extracted to a new subdirectory. Issue

cd RTL8188C_8192C_USB_linux_v3.4.4_4749.20121105
sudo bash install.sh

This will compile and install the new driver files.

Now you can edit GRUB's configuration file. Issue

sudo leafpad /boot/grub/menu.lst

This will load the configuration file into the leafpad text editor. Search for the line starting with 'kernel /boot/vmlinuz' and append the cheat code modprobe.blacklist=rtl8192cu at the end of the line. Save the file and close leafpad text editor.

The you should be ready to reboot your system. After reboot connect your USB wireless LAN adapter and try connecting to your wireless network.

[vlct]

I have installed the driver but im not sure where to put the "modprobe.blacklist=rtl8192cu"

Here is the menu.lst file,





# menu.lst - See: grub( 8 ), info grub, update-grub( 8 )
# grub-install( 8 ), grub-floppy( 8 ),
# grub-md5-crypt, /usr/share/doc/grub
# and /usr/share/doc/grub-legacy-doc/.

## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not change this entry to 'saved' or your
# array will desync and will not let you boot your system.
default 0

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 5

# Pretty colours
color cyan/blue white/blue

## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line) and entries protected by the
# command 'lock'
# e.g. password topsecret
# password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret

#
# examples
#
# title Windows 95/98/NT/2000
# root (hd0,0)
# makeactive
# chainloader +1
#
# title Linux
# root (hd0,1)
# kernel /vmlinuz root=/dev/hda2 ro
#

#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below

## DO NOT UNCOMMENT THEM, Just edit them to your needs

## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
## kopt_2_6_8=root=/dev/hdc1 ro
## kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=/dev/sda1 ro

## default grub root device
## e.g. groot=(hd0,0)
# groot=(/dev/sda,0)

## should update-grub create alternative automagic boot options
## e.g. alternative=true
## alternative=false
# alternative=true

## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
## lockalternative=false
# lockalternative=false

## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=

## should update-grub lock old automagic boot options
## e.g. lockold=false
## lockold=true
# lockold=false

## Xen hypervisor options to use with the default Xen boot option
# xenhopt=

## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0

## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
## altoptions=(single-user) single
# altoptions=(single-user mode) single

## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
## howmany=7
# howmany=all

## should update-grub create memtest86 boot option
## e.g. memtest86=true
## memtest86=false
# memtest86=true

## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false

## should update-grub add savedefault to the default options
## can be true or false
# savedefault=false

## ## End Default Options ##

title Debian GNU/Linux, kernel 3.6.11-64
root (/dev/sda,0)
kernel /boot/vmlinuz-3.6.11-64 root=/dev/sda1 ro

title Debian GNU/Linux, kernel 3.6.11-64 (single-user mode)
root (/dev/sda,0)
kernel /boot/vmlinuz-3.6.11-64 root=/dev/sda1 ro single

title Debian GNU/Linux, kernel 3.6.11
root (/dev/sda,0)
kernel /boot/vmlinuz-3.6.11 root=/dev/sda1 ro

title Debian GNU/Linux, kernel 3.6.11 (single-user mode)
root (/dev/sda,0)
kernel /boot/vmlinuz-3.6.11 root=/dev/sda1 ro single

### END DEBIAN AUTOMAGIC KERNELS LIST

[klaus2008]

I see I made a little mistake. I read your first post again and found

Hi, I have Knoppix 7.0.5 DVD on USB stick, and USB Wireless N 802.11n/g/b adapter.

You are using syslinux as bootloader. Thus you have to edit /mnt-system/boot/syslinux/syslinux.cfg and append the cheat code at the right place. Open an LXTerminal and issue

sudo leafpad /mnt-system/boot/syslinux/syslinux.cfg

Search for a section that looks like

LABEL knoppix
KERNEL linux
APPEND ramdisk_size=100000 lang=de apm=power-off initrd=minirt.gz nomce libata.force=noncq hpsa.hpsa_allow_any=1 loglevel=1 tz=localtime

Place the cursor at the end of the line that starts with 'APPEND' and add the cheat code.

APPEND ramdisk_size=100000 lang=de apm=power-off initrd=minirt.gz nomce  libata.force=noncq hpsa.hpsa_allow_any=1 loglevel=1 tz=localtime modprobe.blacklist=rtl8192cu

Save the file and close the text editor. Then reboot the system. Of course the cheat code 'lang=de' could be 'lang=en' if you are using english language.

[vlct]

When I open "sudo leafpad /mnt-system/boot/syslinux/syslinux.cfg" there is nothing in there, its just a empty file??

[vlct]

Something happened to my USB Knoppix where Leafpad would not open anymore and also the text files wouldn't open anymore either.

So I reloaded the USB stick with a fresh install of Knoppix , reinstalled the new Wifi driver, and now Wifi IS working with no cheat code??

Thanks for your help with this klaus2008.