lockup on USB event kernel 2.4.20

lockup on USB event kernel 2.4.20

[Jay Denebeim]

My SO's computer works fine under redhat 8 which runs on a 2.4.18
kernel, however on redhat 9 with a 2.4.20 kernel it locks up.  Also,
redhat upgraded their kernel to 2.4.20 for rh 8 as well and I saw the
same behavior.

Everything works fine until she moves her mouse which is connected to
the USB, that locks the system.

Is this a known problem?  Any idea how I can debug it?

Thanks
Jay

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Re: lockup on USB event kernel 2.4.20

[Jocelyn Mayer]

> 
> My SO's computer works fine under redhat 8 which runs on a 2.4.18
> kernel, however on redhat 9 with a 2.4.20 kernel it locks up.  Also,
> redhat upgraded their kernel to 2.4.20 for rh 8 as well and I saw the
> same behavior.
> 
> Everything works fine until she moves her mouse which is connected to
> the USB, that locks the system.
> 
> Is this a known problem?  Any idea how I can debug it?
> 
> Thanks
> Jay
Hi,

Is your controler a UHCI one ?
If yes, try to connect your mouse via a hub if it's directly
connected to your computer.
There seem to be an issue with (rare) devices connected directly
to UHCI controlers.
I can easily lock UHCI based computers with an ATMEL Wifi device this way.

Regards.
-- 
Jocelyn Mayer <jma@netgem.com>

Re: lockup on USB event kernel 2.4.20

[Jay Denebeim]

In article <1055446401.4948.408.camel@jma1.dev.netgem.com>, Jocelyn Mayer wrote:

> Is your controler a UHCI one ?

Appears to be using the OHCI driver, so no.

> If yes, try to connect your mouse via a hub if it's directly
> connected to your computer.

Tried it anyway, no joy.

Any other ideas?  Something I could debug would be good.  There's a
definate correlation between moving the mouse and locking up the
machine.  Presumably it is missing an interrupt or something like
that.

Jay

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