Ok, ignore for now my previous two posts. The two machines "reliably" producing "mount: / is busy" have the packet "plymouth-x11" installed. When uninstalling this packet on these machines the error goes away.
At the moment I suspect that those cases which can be solved by means of disabling the "Available to all users" have a different cause.
Ok, ignore for now my previous two posts. The two machines "reliably" producing "mount: / is busy" have the packet "plymouth-x11" installed. When uninstalling this packet on these machines the error goes away.
At the moment I suspect that those cases which can be solved by means of disabling the "Available to all users" have a different cause.