Comcast, possbily motivated by the fear that I would get fed up with their service and move to a region of the country where I might find an alternative cable provider, failed to show up yesterday to fix the connection problem that has persisted for several months now. Nor did they call.
Supposedly they will come to work on it today.
Update: No show from Comcast on Saturday. Someone was supposed to come on Sunday. No show on Sunday, but the individual reported that no one was home (untrue.) Looking to switch to DSL later this week.