On Thu, Apr 06, 2000, Dunlap, Randy <[EMAIL PROTECTED]> wrote:
> I did a small Linux-USB plugtest on my machine
> with around 25 USB devices. Here are the config and
> results.
>
> Pentium III 500 MHz + PIIX4 UHCI + add-in PCI/OHCI
>
> USB Devices (25 with hubs):
[.. snip ..]
Impressive list.
> 6 of 7 keyboards are working.
What problem did the one keyboard have? Did it enumerate? etc
> All 3 are listed as diretories in /proc/scsi.
> However, only 2 of them are listed in /proc/scsi/scsi
> (the 2 Y-E DATA floppy drives are listed; the Zip-100
> drive is not listed).
> Could not unload usb-storage module (hangs system);
> had to reboot system. Repeated and was able to unload
> all modules OK.
Interesting, Did you use the last patch I posted? (The most recent one
you resent off to Linus)
I've had numerous problems with the usb-storage driver, all oops' in the
usb-storage kernel threads and all NULL pointer deferences. I'm going to
try the latest patch posted recently.
> - cpia camera + HCD stability (I've seen some instability;
> will report on it later.)
I've seen a couple of problems myself recently. I was working with a
coworker of mine on a demo and after a couple of minutes, the camera
would start spewing STALL's on the control pipe.
According the USB 1.1 specs, this mean a) The command was not recognized
or b) Something really bad went wrong. Since the command doesn't change
much, I don't think a) was the culprit.
I only had this happen with 1 camera, another camera didn't produce this
behaviour. I haven't tested this extensively yet.
I've also seen instability with usb-uhci. It locks my machine hard after
a couple of minutes. Very reproducible. This is the same problem I
reported a couple of weeks ago.
> - increase maximum size of /proc/bus/usb/devices output
> from 8 KB to 16 KB (comments ? make it dynamic ?)
Making it dynamic may be tough since I don't think the code knows how
large the buffer should be.
I'd personally like to see /proc/bus/usb/devices removed and leave it up
to userspace tools. Getting the ASCII stuff working right may be tough.
But the whole ASCII vs binary flamewar is better left to linux-kernel :)
JE
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