Van Snyder wrote: > I was convinced to do > > apt-get update; apt-get upgrade > > to try to repair a problem in my Debian 10 installation. Now it has a > mish-mash of 10 & 11 pieces.
That's not possible unless you also edited /etc/apt/sources.list (or a file in sources.list.d/). Complete your upgrade to 11; it's past time. 12 will be available in a few months. Double check the sources, run apt update and then apt dist-upgrade. Reboot with the new kernel. -dsr-

