USB suspend has recently been disabled by default in Fedora kernels -
see https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=243038#c19
(although it has been turned on and off a few times). The
usbcore.autosuspend=0 parameter was added in 2.6.21 (see
http://www.linuxhq.com/kernel/v2.6/21-rc6/Documentation/kernel-
parameters.txt or
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b5e795f8df42936590ba9c606edc715fe3593284
) .

fishor:
Thank you!

t2000kw:
Do you have the USB id for that USB braille device that was showing this issue?

-- 
some usb_devices fault if usb_suspend enabled
https://bugs.launchpad.net/bugs/85488
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Bugs, which is the bug contact for Ubuntu.

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