Hi Hadmut, and thanks for reporting this. Could you please paste the
full journald audit log (`journald -t audit`)? I'd like to see if those
AppArmor denials you are seeing are the only ones, or if there's more.

I cannot see any interface in snapd that would grant access to the
"/sys/devices/pnp*" tree; but it might also be that these warnings are
not fatal, and cura-slicer proceeds to do other operations?

** Changed in: snapd (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1950855

Title:
  Can't enable snap to print on a usb printer

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