USB Lockups

USB Lockups

[Michael Cohen]

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

Re: USB Lockups

[Johannes Erdfelt]

On Mon, Jan 07, 2002, Michael Cohen <lkml@ohdarn.net> wrote:
> 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.

Doesn't recognize the USB controller half the time? This is something I
would expect to either work all of the time, or none of the time.

Do you get any error messages?

JE

Re: USB Lockups

[Michael Cohen]

> > 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.
> 
> Doesn't recognize the USB controller half the time? This is something I
> would expect to either work all of the time, or none of the time.
> 
> Do you get any error messages?

The JE driver strangely seems to be an unstable beast on here.
It more often does not work, though every once in a while it wakes up on
boot.  I've stuck with the standard.  As for error messages, "No devices
found" is the only one I get with the standard driver (when nothing is
plugged in :).  Oh, it's SMP PIII.

------
Michael Cohen


> JE
> 
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Re: USB Lockups

[Johannes Erdfelt]

On Mon, Jan 07, 2002, Michael Cohen <lkml@ohdarn.net> wrote:
> > > 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.
> > 
> > Doesn't recognize the USB controller half the time? This is something I
> > would expect to either work all of the time, or none of the time.
> > 
> > Do you get any error messages?
> 
> The JE driver strangely seems to be an unstable beast on here.
> It more often does not work, though every once in a while it wakes up on
> boot.  I've stuck with the standard.  As for error messages, "No devices
> found" is the only one I get with the standard driver (when nothing is
> plugged in :).  Oh, it's SMP PIII.

It'll say that if usb-uhci is loaded since it has claimed all of the
host controllers.

What sort of instability are you seeing?

JE