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Running one system in AP mode with DHCP turns out not to avoid the problem.  I 
tried AP/DHCP and the wireless connection went dead just like it does with 
ad-hoc after several hours.  Me thinks it must be related to USB 
driver/support issues.  I am using the uhci usb device driver rather than the 
usb-uhci (as recommended) though I did try the usb-uhci anyway and got the 
hard system lockup after about an hour.  

With AP/DHCP going, even when the communication between systems died, the 
wireless connection remained - xvnet still counts off incrementing management 
frames and my laptop with hostap still indicates a connection.  No 
information is transferrable between systems, however.  As with ad-hoc when 
the connection goes south, pinging produces destination unreachable messages 
and the usb device (wusb11) fails to increment/detect incoming packets from 
the pinging laptop.

This problem exists with the 2.4.18-6mdk and 2.4.18-8.1mdk kernel.  
Unfortunately, the 2.4.19 mdk kernels have other problems that render them a 
nonsolution for me (buggy/broken supermount, failure to handle my zip drive, 
usb problems, plus a few other odds and ends).

praedor

On Monday 25 November 2002 04:26 pm, you wrote:
> Hi, I'm going to jump in with a few systemic suggestions.  First set
> your HostAP to managed mode. Second install NoCat Auth to manage your
> routing on your AP.  Third get DHCP server running on your server.  Put
> Pump on your client.
[...]
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> > On Behalf Of Praedor Atrebates
> > Sent: Sunday, November 24, 2002 11:00 AM
> > To: Mandrake-expert
> > Cc: Atmel-driver-usb; [EMAIL PROTECTED]
> > Subject: Problems with wireless...unknown source (long)
> >
> >
> > I am having problems with wireless connectivity between an
> > IBM Thinkpad with
> > prism2-based wireless card using hostap_cs and my desktop
> > with a wusb11 v2.6
> > wireless device using the atmel driver.  Both systems are
> > running Mandrake
> > 8.2, kernel 2.4.18-6mdk.
[...]
> > but only for segments of hours.  After a few hours (first
> > time around 3,
> > second time ~8 hours - overnight), with no change obvious in
> > the state of
> > either system, the wireless connection just stops working.
> > The syslogs of
> > each system still indicates they are "connected" but any
> > attempt to ping
> > either direction produces destination unreachable messages.
> > The pings are
> > sent to the correct IPs, however.
[...]
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