From: Fernando Perez <fperez@co...> - 2004-02-29 21:46:31
I'm a new user of the software, many thanks in advance to the developers!
I grabbed the CVS from 02-28-04 (yesterday) and it built fine on a stock
Fedora Core 1 box, once I made sure that sharutils was installed (uudecode
missing doesn't stop the build, which I think it should because without it
things fail in a somewhat mysterious manner).
I'm running it on a Dell Inspiron 4100 laptop with kernel 2.4.22-1.2135.nptl
and a D-Link DWL-G650 card, revision C1. My AP is a D-Link 624 configured
with 128-bit WEP in 'open' mode. I was able to configure the wep keys without
much hassle, and now whenever I simply plug the PC Card in, it finds the AP
and establishes a connection automatically. So far so good :)
However, I am experiencing a strange problem: after some time (10-20 minutes)
of lightweight usage (web browsing over a 256K DSL line, email, and NO other
machines on the network), I begin to drop packets left and right. A ping to a
known live machine, which initially gives me return times ~ 60 ms and 0 packet
loss, starts giving increasingly large packet loss until the link becomes
essentially useless. I typically notice it because web browsing begins to
crawl, and the ping tests confirm the problem.
So far the solution has been to just pull the card out and plug it in again.
The new link always seems to start 'fresh' with good quality, but it only
lasts that way for a few minutes.
This is what iwconfig shows me:
localhost[~/tmp]> iwconfig ath0
ath0 IEEE 802.11 ESSID:"XXXXXX" Nickname:"localhost"
Mode:Managed Frequency:2.437GHz Access Point: XXXXXXXXXXXXXX
Bit Rate:54Mb/s Tx-Power:off Sensitivity=0/3
Retry:off RTS thr:off Fragment thr:off
Link Quality:62/94 Signal level:-33 dBm Noise level:-95 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
and the link quality appears at this level even when the packet dropping
I also don't understand why the link quality is so low: right now I am
sitting only a few feet away from the AP, and when this same card is used from
a Windows laptop, it reports 90+% link quality from the same location. I
don't know if the two issues are related.
If anyone has any suggestions on either how to fix the degradation problem, or
on what additional diagnostics I may provide, I'd be very appreciative.