[lwlan-user] Re: [lwlan-devel] prism2 usb lockup especially under load

[matt pepar]

Please ignore previous truncated emails... I can't operate gmail.

Here is what I think solved the netgear ma111 lockup problem for me.

I got exactly the same problem using Linuxant driverloader as I did using
linux-wlan-ng ie. -EILSEQ error message and adapter lockup.

Searching on Google indicated people running Win XP suffered similar lockups
after 5 minutes.

These bits of information made me think the lockup was a hardware/firmware
issue. ie. not a problem with host usb or the software driver (although i
spent some time randomly hacking the code also).

My adapter seemed especially hot after a while as it is situated near the
power supply and gets hot air blown onto it, not to mention the considerable
heat it generates itself.

More searching on "ma111" and "overheating" indicated that overheating may
be a cause of adapter lockup.

I moved the adapter to the front of the PC and loaded the network. The
adapter locked up but after ten minutes instead of five.

So i thought i might be onto something. I got an ice-gel bag from the
freezer and wrapped it around the adapter. I didn't get lockups for an hour
after doing that....

Obviously frozen gel bags aren't a long term solution. So I'll probably cut
open the adapter and fit a heatsink to whichever chip gets the hottest....
For some reason a batch of these ma111's must be particularly heat
sensitive.

Matt.







On 1/2/06, matt pepar <mattpepar at gmail.com> wrote:
>
> Sorry, about truncated last message. Continues here.
>
>
>
> On 1/2/06, matt pepar <mattpepar at gmail.com> wrote:
> >
> > Thanks for your reply.
> >
> > I'm not running hald but I have been doing a lot of searching on google,
> > configuring, coding etc.
> >
> > Here is what I found out:
> >
> > I believe I have solved the problem for my piece of hardware.
> >
> >
> >
> >
> > On 12/31/05, Karl Relton < karllinuxtest.relton at ntlworld.com> wrote:
> > >
> > > On Tue, 2005-12-27 at 08:29 +1100, matt pepar wrote:
> > > > Hi,
> > > >
> > > > I am having trouble with a netgear ma111 usb dongle.
> > > >
> > > > It seems to be the same problem occuring in this message:
> > > >
> > > > http://lists.linux-wlan.com/pipermail/linux-wlan-devel/2005-May/003252.html
> > >
> > > >
> > > > That is, the adapter seems to lock-up (same error messages),
> > > > especially under high load.
> > > >
> > > > I am running kernel 2.6.10 with a VIA 8233 USB host.
> > > > I would be interested in trying to fix this problem.
> > > >
> > > > I imagine that the prism2 pc/pci cards work OK under high load, so
> > > > problems would likely be located in the USB code?
> > > >
> > > > Any thoughts on this?
> > > >
> > >
> > > Matt
> > >
> > > Look over on the linux-wlan-user maillist for the same time period,
> > > where there is alot more discussion.
> > >
> > > It mostly boils down to the hald daemon. Are you still on hal 0.4.7?
> > > If
> > > so, upgrading to 0.5.x is recommended. Even with that, you may need to
> > > arrange things so that your wifi card does not initialise until after
> > > hal has started, and/or sanitise your hotplug/coldplug support code.
> > >
> > > Rest assured though that the problem can be overcome - I haven't had a
> > > lock for months now.
> > >
> > > Karl
> > >
> > >
> >
>
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