I really hate intermittent bugs.  The previous two times (before just
now) that I turned the AV receiver & TV back on, everything reverted to
normal (VGA-0 off, HDMI-0 on at 1920x1080 60 hz at 0x0, DVI-D-0 offset
to 1920x0).  However, just now, turning the AV receiver & TV on resulted
in:  VGA-0 on, 1024x768 at 2944x0; HDMI-0 on, 1920x1080 60 hz at 0x0;
DVI-D-0 on, 1920x1080 at 1920x0.
However, just running 'xrandr > xrandr.output3' (i.e., just outputting
the current xrandr state to a text file) caused the monitors to reset to
the correct values (although 'xrandr.output3' still showed the incorrect
values).  Running 'xrandr' again showed the correct values.

I will try to install the latest upstream kernel this weekend and see if
that makes any difference.

** Attachment added: "xrandr output after turning HDMI accessories back on 
(failed to restore previous settings)"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1787861/+attachment/5178982/+files/xrandr.output3

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https://bugs.launchpad.net/bugs/1787861

Title:
  Displays not detected/positioned correctly when
  disconnected/reconnected

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