hostap hangs when reseting..
Tue May 13 07:56:44 PDT 2003
Better antenna do not help.. :-( i have SNR over 30dB, and reset still
occurs in aprox. 1 time per week... And linux hangs and hangs.. :-((
N49? 02,40' E19? 43,07'
----- Original Message -----
From: Milan Krcmar <milan.krcmar at seznam.cz>
To: Lukas Zvonar <lukic at mag-net.sk>
Sent: Tuesday, May 13, 2003 4:09 PM
Subject: Re: hostap hangs when reseting..
> I've seen many times the idea of receiving a frame during reset causing
> total machine lockup. Is there a reason (proof) for this assumption?
> I have had several (about 5) computers with PRISM2.5 PCI card and hostap
> and can confirm that card reset (should it be triggered on user's behalf
> from iwpriv or from some control condition in hostap) sometimes locks the
> machine (and only hard reset can recover).
> It is a property of each and every computer with PRISM and hostap I know
> of. This is experience of a large user group counting several tens of
> hostap based APs. Various hardware used for computer itself, card mostly
> Zcomax Xi626, but also DLink 520 and so on).
> The only way to make the hostap behave stably is to avoid resets (the most
> frequent reason hostap shedules card reset seems to be weak signal from AP
> while it is in Managed mode, I just had to use a better antenna).
> On Mon, May 12, 2003 at 11:18:55PM +0200, Lukas Zvonar wrote:
> > Hi!
> > Can anybody try this?
> > One machine (say A), have eth0
> > second machine (say B) have br0, where belongs eth0 (connected to A)
> > hostap in ap mode wlan0 (i think it will do the same, if there is no
> > bridgeing, just pure ip routing, the problem is - IMHO - recieved packet
> > when card reset occurs).
> > third machine (say C) is client (i have IBM laptop with Win98 and
> > PCMCIA - it do not depend on it).
> > Machine C starts data transfer with A, for exaple i used flood ping from
> > to C (ping -f -s 500 IPofMachineC)
> > then on machine B i simulate signal lost - when often reset of card
> > caused by TX timeout - i just run: iwpriv wlan0 reset 1
> > And - thats the problem, on some reset (for sure is less then 30 in
> > machine B hangs..
> > I think when card is reseting and some packet is recieved..
> > last CVS version did'n solved the problem... :-((
> > I have used D-Link DWL 520 card in machine B, and RH linux with kernel
> > 2.4.7-10 (standard installation)...
> > I have also tried various firmwares (1.3.6,1.4.9,1.5.6) with the same
> > result, and also debian linux with 2.4.20 kernel, with of course same
> > results..
> > I'm near sure, that it's problem of hostap, because i have seen that
> > people writes about unidentified hangs of machines where hostap is
> > So, can anybody try this to ensure me, that is not HW problem of D-Link
> > or kernel problem (in which i don't believe, because all other things is
> > running properly and system hangs just right after reset of card is
> > started).
> > Lukic
> > N49? 02,40' E19? 43,07'
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> > HostAP at shmoo.com
> > http://lists.shmoo.com/mailman/listinfo/hostap
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