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Rockbox mail archiveSubject: Re: usb-storage not recognizing archos 20g fm recorder in linuxRe: usb-storage not recognizing archos 20g fm recorder in linux
From: Christian Mahr <christian.mahr.ulm_at_arcor.de>
Date: Mon, 27 Oct 2003 21:47:02 +0100 Hi all, I have observed that hotplugging my archos recorder 20 to Linux depends sometimes on the sequence of what you do first: a) switch-on archos first, wait for complete power-up, then connect b) connect USB first, then power-on As I overserved, option a) works much more reliable than b). From my investigations (switching on tracing in usb-storage) in ealier kernel versions I believe that during b) the USB interface in the archos is not fully operable during boot, at a time linux already wants to access the disk. So sometimes the first accesses to the disk fail on a USB-block-exchange-level. On he other hand, until very recently, the re-tries from linux side following an USB failure did not work in all of the possible error scenarios. Such hang-ups can be be ovserved when you see usb-drivers in "D" or "DW" state.... my current kernel version 2.4.23-pre7 seems to work best so far, but i did not do a exhaustive research on this very recent kernel version. Cheers Christian Am Freitag, 24. Oktober 2003 20:30 schrieb John covici: > Well I put the line in fstab and I got drivers and devices under > /proc/bus/usb, but under devices there is nothing, under drivers > there is usbdevfs usbhub and when I do the modprobe for usb-storage > there is usb-storage but the device is still not detected. > > on Friday 10/24/2003 Alexandre Belloni(abelloni_at_nerim.net) wrote > > > On Fri, Oct 24, 2003 at 10:39:59AM -0400, John covici wrote : > > > What do you mean "mounted your usbfs" -- this is part of the /proc > > > file system which of course is mounted. > > > > Do you have a line like that in your /etc/fstab ? > > > > none /proc/bus/usb usbfs defaults 0 0 > > > > if not, usbfs is not mounted so there is nothing in /proc/bus/usb > > > > -- > > Alexandre Belloni > > AE-UTBM: http://ae.utbm.fr - - Lolut: http://lolut.utbm.info > > Key fingerprint = A7C6 7CD4 4328 59D1 79FD B8BB 945F 4DD5 B634 89BD -- Christian Mahr (privat) christian.mahr.ulm_at_arcor.deReceived on 2003-10-27 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |