Subject: USB Lockups
From: Michael Cohen <lkml@ohdarn.net>
To: linux-kernel@vger.kernel.org
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Date: 07 Jan 2002 19:20:29 -0500
Message-Id: <1010449229.4069.6.camel@ohdarn.net>
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Sender: linux-kernel-owner@vger.kernel.org

More experience with USB lockups here.

I have an Apollo Pro (694x) and an Apollo Super South (686b),
and it's interesting how quickly this machine freezes under 2.4.18-pre1.
All I have to do is send about 100KiB/second over my NIC and the USB
(moving the mouse and tapping on the keys on my USB HID devices causes
a hard lock with no messages of any kind.  Can't even get a serial
console.)
Tried with UHCI and JE driver. JE doesn't recognize the USB controller
half the time.  It seems to me that this is similar to the problem
with a saturated PCI bus that someone posted a latency fix for.
I'd appreciate any input.  A similar machine does this on windows as
well, too.  BIOS is as late as it gets.

-------
Michael Cohen

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