Hi there,

On Wed, 17 Mar 2004, John H. wrote:

> 00:10.0 USB Controller: VIA Technologies, Inc. VT6202 [USB 2.0 controller] (rev 80)
>
> I am having really ugly problems with usb on my new machine with linux.

Join the club.

Until now my advice would have been forget 2.4 kernels and VIA for
USB.  If you can use 2.6 then try that, but don't expect it to be
plain sailing all the way.  However recently (today) it has popped up
on the list that there may be some important differences between Linux
and Debian as far as USB is concerned.  I don't yet know what's going
on there but I mean to find out.

Here's my experience with USB and VIA and Linux (both RedHat and
Slackware) kernels:

2.4.18 Crashes the kernel.
2.4.19 Crashes the kernel.
2.4.20 Crashes the kernel.
2.4.21 Crashes the kernel.
2.4.22 Crashes the kernel.
2.4.23 Crashes the kernel.
2.4.24 Crashes the kernel.

2.6.0-pre1 as 2.6.1 below.
2.6.1
Doesn't crash the kernel at least, but if you unmount any usb-storage
device you can't mount it again until after you next reboot PLUS our
VPN doesn't reconnect about 30% of the time when our French site
renegotiates a DHCP lease.  So I gave up with 2.6 and had to go back
to 2.4.24.  Which I'm afraid means that I had to give up using USB for
the moment since  most of the time I can't risk crashing kernels like
that.  Of course this makes it kinda hard to work on the documentation
but I'm doing the best I can working from other peoples' experiences.

I plan to have another go as soon as I can (a) catch up with 2.4.2x
kernels on all our boxes, (b) try a patch that should stop corruption
of our IDE drives and (c) find out why some stuff seems to work on
Debian (Knoppix-maybe other Debian?) but seems not to work on the
Slackware and RedHat Linux systems I have unfortunately to maintain...

> usb 1-3: device not accepting address 39, error -110

This probably means interrupt problems as it says in the FAQ.  YMMV.

If anyone out there has experience of using Debian and USB will they
please speak up now?  I'm particularly interested if you have seen
differences between the performance of Debian and Linux on the same
hardware.

73,
Ged.


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