I have recently replaced a machine running 9:10, with a higher-spec machine running 10:04. This is a "server"
Machine has 2 network cards - and onboard eth0 which connects perfectly to my Homeplug network - no issues there. eth0 is the default gateway on 192.168.1.x
I moved from the old machine, a PCI wireless card which gives me wlan0. This connects to a completely separate network 192.168.2.x. This is my home-office network, and I connect from my office laptop, to the machine using X2Go. Previously, I had no issues whatsoever with this connection - it would stay up indefinitely.
The new machine is in the exact spot the old one was, and the home-office router has not moved. But I now have odd intermittent connection problems which upset X2Go, and drop the session.
Running a constant PING from my laptop to the machine, I get a few dropped packets ever so often. This is bi-directional, as running a constant PING from the server to the router also logs dropped packets.
The output of iwconfig wlan0 is
which seems to suggest that power and radio properties are quite good.
wlan0 IEEE 802.11bg ESSID:"???????????????"
Mode:Managed Frequency:2.437 GHz Access Point: B0:E7:54:1F:51:59
Bit Rate=54 Mb/s Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Link Quality=54/70 Signal level=-56 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
There's nothing (I know of) going on around me in the RF space to cause wi fi issues.
Can anyone suggest further diagnostics I can run to locate any issue ?