I just installed chromium on my 20.04 machine. I've not used chromium on this system before. It installed but I get this warning:
snap "chromium" has bad plugs or slots: system-packages-doc
$ snap install chromium
2020-07-16T11:52:42+01:00 INFO snap "chromium" has bad plugs or slots: system-packages-doc (unknown interface "system-packages-doc")
2020-07-16T11:52:45+01:00 INFO snap "chromium" has bad plugs or slots: system-packages-doc (unknown interface "system-packages-doc")
chromium 84.0.4147.89 from Canonical✓ installed
WARNING: There is 1 new warning. See 'snap warnings'.
$ snap version
snap 2.45.1+20.04.2
snapd 2.45.1+20.04.2
series 16
ubuntu 20.04
kernel 5.4.0-40-generic
According to the documentation for system-packages-doc, this isn't available until snapd 2.46+, which isn't available in any channel. https://snapcraft.io/docs/the-system-package-doc-interface
channels:
latest/stable: 2.45.2 2020-07-15 (8542) 31MB -
latest/candidate: 2.45.2 2020-07-15 (8542) 31MB -
latest/beta: 2.45.1 2020-06-05 (8140) 31MB -
latest/edge: 2.45.2+git2005.gfdaa74a 2020-07-16 (8596) 31MB -
installed: 2.45.1 (8140) 31MB snapd
Perhaps we shouldn't use interfaces which aren't available yet?
When I added that plug I was told by the snapd team that unknown/
It turns out silence is a loud and scary warning.
I'll revert the addition of the plug for now, until snapd 2.46 is available.