Speaking about wired connections I've always had an excellent network performance with Ubuntu. However, I bought a wireless network adapter a few months ago (RaLink RT2561/RT61 802.11g PCI). The link quality is simply horrible and I'm disconnected from minute to minute -- me and the wifi router are in the same room. Sometimes I even have to reboot if I wish to reconnect. This is an example of the best I can get with it:
The problem also exists in Debian Lenny. I know it's not a matter of hardware because it doesn't happen in a similar computer with Windows XP installed, which gives me a signal strength of 95/100 and not less (but the link quality is also awful on Ubuntu in that machine).
lo no wireless extensions.
wmaster0 no wireless extensions.
wlan0 IEEE 802.11bg ESSID:"slippersonfire"
Mode:Managed Frequency:2.437 GHz Access Point: 00:1E:58:14:80:34
Bit Rate=11 Mb/s Tx-Power=3 dBm
Retry min limit:7 RTS thr:off Fragment thr=2352 B
Link Quality=30/100 Signal level:-72 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
In face of these circunstances I tried to replace the native RT61PCI driver with a ndiswrapper alternative but in all possible ways I couldn't make it work (wlan0 misteriously isn't listed by iwconfig, although the device is recognized according to lspci and lsmod shows the system is loading the correct drivers).
Well, this forum is my last resort. I've done all I could do. Please, "halp"! Here are the specs:
Network controller: RaLink RT2561/RT61 802.11g PCI
Driver in use: kernel/drivers/net/wireless/rt2x00/rt61pci.ko
System: 2.6.28-15-generic #48-Ubuntu x86_64