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Subject: Re: USB2 on Linux - an eye witness' story!
From: tr16_at_mail.inf.tu-dresden.de
Date: 2002-04-23


On Tue, Apr 23, 2002 at 10:24:03AM +0100, Charlie Stross wrote:
> On Tue, Apr 23, 2002 at 12:24:09AM +0200, Daniel Stenberg wrote:
> >
> > I configured, rebuilt, rebooted and had problems since then. After I've
> > insmod'ed my USB kernel mods and I switched on my Archos Recorder, I always
> > got segfaults when doing 'cat /proc/scsi/scsi', but 'cat
> > /proc/bus/usb/devices' seemed to find and identify my Archos.
>
> On a related note: I run PowerPC Linux on an iBook2. (Current distro is
> SuSE 7.3 with kernel 2.4.12.)
>
> The first time I plugged the Jukebox in and loaded usb-storage, it failed
> to recognize the device at all, no matter what I did -- so I rebooted into
> MacOS X for a while. Subsequently I needed Linux, and happened to reboot
> with the Jukebox plugged in. Guess what? Problem goes away, Jukebox shows
> up.
>
> Now the one point to note is that the iBook has a DVD/CDRW, and I was manually
> loading ide-scsi so I could burn CD's on it. Here's what my /proc/scsi/scsi
> currently shows:
>
> Attached devices:
> Host: scsi0 Channel: 00 Id: 00 Lun: 00
> Vendor: FUJITSU Model: MHN2200AT Rev: 7257
> Type: Direct-Access ANSI SCSI revision: 02
> Host: scsi1 Channel: 00 Id: 00 Lun: 00
> Vendor: TOSHIBA Model: DVD-ROM SD-R2002 Rev: 1B29
> Type: CD-ROM ANSI SCSI revision: 02
>
> One of these SCSI hosts is USB mass storage; the other is IDE-SCSI, and
> I have a sneaking suspicion (haven't yet done the neccessary series of reboots
> to confirm this) the the order you load them in is significant.

I use ide-scsi as well (kernel parameter, 2.4.18) and it works well. and it was
0,1,0 before i bought my archos or used usb-storage.

However it is important to turn the jukebox on before plugging in the usb
cable. otherwise there are crashes. In the beginning i just put it the
cable from the dc adapter and thought it would work...
Maybe this is related to the jukebox doing things the kernel doesnt expect.
And it doesnt work with the JE uhci module, I lost the fs on the jukebox
when I used it. But it hang quite a while, so this is probably timeout
related, and not because of data corruption.

Torvald



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