I set udev's loglevel to "debug" and saw something interesting in my
logs [1] after turning on the printer. Specifically, the following line
appears to be of interest:
Oct 12 19:38:26 foutboxd udevd-work[7541]: '/lib/udev/usb_id' (stderr)
'error opening USB device 'descriptors' file'
Maybe the 'descriptors' file hasn't been created when the udev rules
fire? I think this would explain why subsequent calls to udevadm
test/trigger apply the correct group to the printer.
Random coincidence, my Canon PIXMA iP3000's print head died soon after I
noticed the above error, more than three years after the printer was
bought. Time to get a cheap laser printer (I'm considering the Samsung
ML-1640) I guess, since getting a new print head for my old inkjet
printer would cost more. :<
PS: Sorry for going a bit off-topic about my dead printer, I felt like
talking about it a little. :(
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[1] http://omploader.org/vMmphMg
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