1) On the firmware errors: they come from the open b43 driver, since the firmware is not installed. This is something the b43-fwcutter package can help with, if you want to use that.
2) As for the driver installation issue, I wonder if ubuntu-drivers is confused, finding both bcmwl-kernel-source (isn't this a transitional package in Lunar?) and broadcom-sta-source in the image (which, I assume, have overlapping modaliases)?
3) The actual lack of a network device sounds like the driver is not working, in which case, I would like to see the "dmesg" output.
1) On the firmware errors: they come from the open b43 driver, since the firmware is not installed. This is something the b43-fwcutter package can help with, if you want to use that.
2) As for the driver installation issue, I wonder if ubuntu-drivers is confused, finding both bcmwl-kernel-source (isn't this a transitional package in Lunar?) and broadcom-sta-source in the image (which, I assume, have overlapping modaliases)?
3) The actual lack of a network device sounds like the driver is not working, in which case, I would like to see the "dmesg" output.