Comment # 56 on bug 938659 from Markus Elfring

(In reply to Johannes Meixner from comment #52)
> In this particular case the actual problem is that later rules
> falsely override default rules (because those later rules
> are not "for special cases").

I could try to achieve better settings also by an additional udev rule file,
couldn't I?

Further ideas:
* Have you been looking for solutions around similar system configuration
challenges already?

* Do we need the combination of the device access permissions from the groups
"lp" and "plugdev" in the discussed use case?

* Which is the recommended way to extend access control lists by udev
interfaces so that functionality like "printing", "picture scanning" and
"Android software development/debugging" can be used together?
  (Are corresponding device interfaces cleanly separated?)