Comment 12 for bug 147369

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David Suffield (david-suffield) wrote : Re: system-config-printer fails to automatically configure a printer

The syslog message "Sep 30 16:15:40 richard-desktop photosmart_7550?serial=CN33I4116P7E: io/hpmud/musb.c 549: invalid product id string: Operation not permitted" means that the /dev/bus/usb/xxx/xxx permissions are not set correctly.

The udev 55-hpmud.rules file from 2.7.9 should fix this issue.