Snap hangs when accessing a special /dev/file (/dev/vcio) [ubuntu-core 16 / RaspberryPi2]

[Jacques Supcik]

Thank you Oliver for your constructive feedback.

I like the idea of a "mailbox-device" and I will open a bug in the
whishlist of snappy.

My snap needs also write access to "/dev/mem":

= AppArmor =
Time: Nov  9 19:09:52
Log: apparmor="ALLOWED" operation="open"
profile="snap.telecom-tower.daemon" name="/dev/mem" pid=3643 comm="tower"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
File: /dev/mem (write)

Should this also be addressed by the "mailbox-device" interface or should I
fill another bug for a "physical-memory" interface? Or do you have an idea
for a better name? Or is there already something available for accessing
/dev/mem?

█  Jacques
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