Comment 399 for bug 85488

Sitsofe, about the Canon LiDE series: Testing to "prove" it's OK is not worthwhile. I can equally "prove" it's not.

What Ubuntu should do gather vendor information. Contact Canon to ask

(1) how similar the firmware is across the LiDE line and
(2) how well it supports USB suspend, if at all.

Then proceed with that data.

The fact that one LiDE model now barely works for one test configuration does not discount the standing LiDE bug reports, let alone kernel chatter about broken suspend code. Right now they are chattering how to change it. That will throw this whole discussion up in the air. The USB subsystem itself has been rewritten three times.

To clarify what does not work: We boot with scanners plugged in. The Canon LiDE60 prevents USB disk detection from working properly. We boot hand-portable USB disks where possible, so for us, the problem is acute. Anyway it is a different usage pattern than your hotplug test. The last thing we want users doing is hotplugging questionable USB devices that activate questionable kernel code.

Another laptop-lust item came to our annoyance recently, a package called uswsusp which we had to purge because it can't handle udev aliases properly; it needs hardwired device letters. Otherwise it stalls the boot sequence with cryptic device questions when booted on another PC. These laptop-lust "killer features" are getting very tiresome.