It looks like regularly blacklisting USB devices in the kernel will soon
be at an end. According to this git commit
http://git.kernel.org/?p=linux/kernel/git/gregkh/usb-2.6.git;a=commit;h=7d2c592609a7da950b458403f1936d382f38ff9c
USB autosuspend will be disabled for everything bar USB hubs. I suspect
those devices (or perhaps categories of devices) that do suspend can
probably be dealt with by HAL and perhaps put into some sort of
whitelist. Some of the discussion leading up to the change can be read
on http://kerneltrap.org/Linux/Whitelists_and_Blacklists (which mentions
that nearly 2/3rds of all printers can't cope with USB autosuspend).

Will this change be backported to Ubuntu Gutsy?

-- 
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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