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List:       linux-usb-devel
Subject:    [linux-usb-devel] problems with ARCHOS ukebox recoder 20 on USB
From:       Christian Mahr <christian.mahr.ulm () arcor ! de>
Date:       2002-03-31 12:19:59
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Dear All

I am using Linux 2.4.18 with the patch (from 2.4.17)
usb2-ehci-0114.patch and hcd-0120.patch to support usb2.0.


When I first connect the ARCHOS Jukebox Recorder 20 on USB and then
afterwards start the usb support

(either manually or by rchotplug start), everything works fine: I can
mount the drive, read and write it properly.


When I start the usb support first (either manually or by "rchotplug
start"),

it does not (!) work. Symptoms:

- the processes klogd and scshi_eh_1 are in state "D" and "DW".

- var/log/messages shows

Mar 30 23:10:01 Mahrmaid kernel: usb.c: kusbd: /sbin/hotplug add 2
Mar 30 23:10:02 Mahrmaid kernel: Initializing USB Mass Storage driver...

Mar 30 23:10:02 Mahrmaid kernel: usb.c: registered new driver
usb-storage
Mar 30 23:10:02 Mahrmaid kernel: scsi1 : SCSI emulation for USB Mass
Storage devices
Mar 30 23:10:08 Mahrmaid kernel: ehci-hcd.c: 00:12.2 urb_dequeue
c940d220 qh state 1
Mar 30 23:10:08 Mahrmaid kernel: hcd.c: giveback urb c940d220 status
-104
Mar 30 23:10:12 Mahrmaid kernel: ehci-q.c: ep 2-in qtd token 000d8d50
--> status -75
Mar 30 23:10:12 Mahrmaid kernel: hcd.c: giveback urb c940d220 status -75

- the device entry in /proc/scsi/scsi is present but the manufacturer
and drive name is missing

- even the next system shut-down will then create problems

because of the hanging procceses (with fsck after reboot)

The archos itself takes a very long time until ite becomes ready after
switch-on, about 10 seconds.

I already tried to enlarge GET_TIMEOUT to 30 (having
CONFIG_USB_LONG_TIMEOUT set) but no success.

I have got the impression that in these cases the first read to the
manufacturer infos is failing

and somehow the processes become stuck.

Any ideas what I should try to overcome this blocked system? try a newer
patch?


Best regards

    Christian



--
Christian Mahr (privat)                  christian.mahr.ulm@arcor.de




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