I am having some problems with my very small wireless network. I have ADSL via a 4-port Netgear DG834 router to which is connected my floor-standing machine running Debian Sarge (up to date). Connected to the router is a Netgear WG602 wireless access point. I also have a Dell Latitude (fairly old at 400 MHz) and a Netgear WG511 PCMCIA wireless network card.
I bought the WG511 because I'd seen on the web that it worked well with Linux using the Prism54 drivers. I discovered shortly after the purchase that there were two versions of the card - one made in Taiwan and one made in China. The Chinese one didn't have the Prism chipset and would not work with the current Linux drivers. I, of course, ended up with the Chinese version.
I then discovered 'ndiswrappers'. This Linux software acts as a translation layer between the Windows XP drivers, on the CD that came with the card, and Linux. I installed that and have a working card.
That's where the problems start. I can connect to the Internet and get data transfer speeds which are the same as I'd expect with the eth0 PCMCIA network card in the laptop connected to the router by cable - about 60kb download.
If I try to mount a directory on the floor-standing machine everything slows down. It takes around 7 seconds to mount the directory compared with instantaneous over the cable network, the 'ls' command takes 2 secs and 'ls -l' takes 50 seconds. During that 50 seconds the data transfer light on the WG511 flickers slowly and intermittently - the time when there is no data transfer is much greater overall than the time when data is being transferred. There is no great CPU activity either. Connecting from the floor-standing machine to the laptop is just as slow. Trying the same with X running makes it even slower. Screen repaints are also very slow under X.
I just tried copying a small file from one machine to the other and typing and screen painting was very slow but the actual copy was almost instantaneous. It appears that just mounting something on the remote machine slows the laptop down and, once disconnected, every thing goes back to normal.
This all makes communication between the two computers via wireless virtually unusable.
Any suggestions would be gratefully received. I'm out of ideas (I never had many in the first place).
Output of iwconfig:
wlan0 IEEE 802.11g ESSID:"mynet" Mode:Managed Frequency:2.462 GHz Access Point: 00:08:5B:67:03:8D Bit Rate:54 Mb/s Tx-Power:32 dBm RTS thr:2347 B Fragment thr:2346 B Encryption key:off Power Management:off Link Quality:100/100 Signal level:-38 dBm Noise level:-256 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0
Barry Samuels http://www.beenthere-donethat.org.uk The Unofficial Guide to Great Britain