USB mp3 player not recognized

Bamboe · Posted: Tue Jan 18, 2005 6:54 pm Post subject: USB mp3 player not recognized

Hi,

I'm having troubles getting a external mp3 player (which behaves like an external hard drive) detected.
I am running kernel 2.6.10-ikke4 (which is a rather clean patchset, containing reiser4, vesavb-tng and some bug fixes).
I have hotplug emerged and running, and am using udev for my device node management.
The most important config sections from my .config look like:

feld · Guru Joined: 29 Aug 2004 Posts: 593 Location: USA

do it the NEW usb flash drive / usb storage way and maybe it will work.

Enable:
Device Drivers -> Block Devices -> Low Performance USB Block driver

now when you connect it, it should be @

/dev/uba1

Put it in your fstab if u want a mount point for it.

good luck!

-Feld
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< bmg505> I think the first line in reiserfsck is

if (random(65535)< 65500) { hose(partition); for (i=0;i<100000000;i++) print_crap(); }

Bamboe · Posted: Tue Jan 18, 2005 7:20 pm Post subject:

It is not a low performance drive, it has a high speed 30gb harddrive, so for now I'll keep trying to do it the classical way. I'm going to try with an other kernel now and double check all my config options, and see where I get.

jamesshuang · Tux's lil' helper Joined: 08 Aug 2002 Posts: 120

Perhaps try modularizing the USB stuff, and try loading, and unloading the usbstorage module?

Bamboe · Posted: Tue Jan 18, 2005 7:34 pm Post subject:

OK, that's what I'm doing now. Compiling now the latest gentoo-dev-sources, should be ready within 20 minutes or something...

Bamboe · Posted: Tue Jan 18, 2005 8:07 pm Post subject:

No luck yet: when compiled in as modules, even my usbmouse doesn't get detected after modprobing usb-ehci and usbhid. Could it be a problem with udev or hotplug?

What's strange also, is that when I'm using my kernel with everything compiled in statically, the usb drive isn't detected at boot-up, it only shows up in dmesg when I pull the cable out and put it back in.
This is my dmesg |grep -i usb output:

Bamboe · Posted: Tue Jan 18, 2005 10:32 pm Post subject:

It turns out to be a problem with ehci. First, I noticed my mouse doesn't work when only ehci_hcd and usbhid are loaded. By loading the uhci_hcd module, the mouse works. Then, I unloaded every usb module and loaded only uhci_hcd and usb-storage, and the mp3 player showed up as /dev/sda (and was registeres as a uhci device, resulting in slow transfer speed).

When I have only uhci loaded, I get:

Atle · Apprentice Joined: 16 Sep 2004 Posts: 179

dsd · Posted: Tue Jan 18, 2005 11:37 pm Post subject:

ehci only supports usb2 devices. your mouse is not likely to be usb2 (the bandwidth is not needed) and it looks like your mp3 player is not usb2 either.

usb2 is backwards compatible with usb1.1 by the means of providing two controllers on the same port (ehci and uhci). the idea is that you load both uhci and ehci so that you can support both types of devices.
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http://dev.gentoo.org/~dsd

Bamboe · Posted: Wed Jan 19, 2005 9:28 am Post subject:

You're right, I figured that out too. But the strange thing is that it disappears from /proc/bus/usb/devices as of the moment I load ehci-hcd. (while it is present when only uhci-ecd is loaded)

It seems that the mp3 player (an Archos AV340 with 40gb hdd) is really an USB2 device according to it's specifications and the dmesg output: