Re: [Bugme-new] [Bug 14778] New: USB (intel chipset) with external mass storage extremely slow or blocking

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Hi,

Alan Stern wrote:
> If you can find an earlier kernel that didn't have this problem, please 
> let us know.  Better yet, find the first version where the problem 
> manifests.
>   

Unfortunately I couldn't reproduce it, because it was working with an
Ubuntu 8.04 release, where the regular kernel did not boot from the
disk. I had replaced that with a self compiled kernel at that time, but
didn't keep the kernel conf.


But the more I test, the more I am confused.

I have tested six (!) different multi-card readers (those cheap x-in-1
readers that have CF, SD, microSD, MMS, ... slots and usually occupy
three or four /dev/sd* devices), and they all cause trouble as described
(one even reports write-enabled SD-cards as write-protected).


On the other hand, I have tested three card readers made for one
particular card type only (SanDisk MicroMate for SD, a no-name
SD-Expresscard-USB-Reader and a no-name CF-Expresscard-USB-Reader) that
worked well, but only if none of the multi-card readers had been
connected since last reboot (or at least that's what it appeared as).


Maybe there's some problem with these multicard readers that brings
something out of order.

regards
Hadmut

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