Dear developers and other users,

One week ago, I reported problems with my USB Drive (a Leading Driver
UD-11), when trying to use it with Linux.

The problems still persist after many different kernel releases, using
both kernels from the 2.4 and the 2.6 series.

Unfortunately, it seems that my messages were ignored after some point,
but if it is for lack of information, then I would like to know which
information is needed (I even provided a decoded Oops, but if that is
not sufficient, please let me know).

The problems that I have is that, despite all my efforts, the drive is
only part of the time recognized as a valid block device. About 80% of
the time, it simply is not recognized as a block device and I see many
error messages generated by the kernel (see attached dmesg).

I can use my drive without any problems under both MacOS X and under
Windows and sometimes under Linux, which leads me to think that it is
not a problem with the drive itself but only with the kernel.

Using a 2.6.0-test9 kernel, when my drive is not recognized, I remove
the drive and then plug it again, I see khub enter the "D" state. From
there on, if I try to disable the hotplug subsystem (via
/etc/init.d/hotplug stop), hotplug also becomes ininterruptible.

If you want to see my earlier messages about the problem, please see:
http://www.ussg.iu.edu/hypermail/linux/kernel/0311.0/0650.html
http://www.ussg.iu.edu/hypermail/linux/kernel/0311.0/0652.html
http://www.ussg.iu.edu/hypermail/linux/kernel/0311.0/0850.html
http://www.ussg.iu.edu/hypermail/linux/kernel/0311.0/0998.html

I put here attached both a dmesg after a fresh boot (and the device
ignored) and a dmesg of the system after I remove and reinsert the USB
Drive.

Please, help.


Thanks in advance, Rogério Brito.

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  Rogério Brito - rbrito@ime.usp.br - http://www.ime.usp.br/~rbrito
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