Comment 2 for bug 1878206

Thanks for reporting.

Based on the error message, this doesn't seem to be directly caused by firmware-b43-installer. It looks like there's a different apt-get process currently running, perhaps installing other packages in a different terminal? Could you check if all other apt-get processes are finished and if you still get the same error?

Normally it is only possible to run one apt-get process at the time, though it should remove the lock once finished. If a lock is still "left behind" that might be a bug in apt.