(This is an update to my posting from January 31, 2016.)
I recently got a Marantz AV receiver, but I had an annoying problem connecting my MythTV system to the television through it: things are fine if, when I boot up the MythTV system, the TV is

Solution to an HDMI problem connecting MythTV system to TV via a receiver (version 2)

Ubuntu/Mythbuntu 14.04 – how to stop the screen from blanking after a period of inactivity
I wanted to stop the screen on my Mythbuntu MythTV system from being blanked after a period of inactivity. (This is to improve the usability of the system – otherwise when someone is faced with a blank TV screen it’s difficult enough trying to figure
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Solution to an HDMI problem connecting MythTV system to TV via a receiver
April 2016: I now advocate a different approach to solving this problem – see my update at https://vaughanharper.com/2016/04/28/solution-to-an-hdmi-problem-v2/ .
I recently got a Marantz AV receiver, but I had an annoying problem connecting my MythTV system to the television through it: things are fine if, when I boot