Public bug reported:
I need to have a script on Ubuntu 8.04 with my Acer Extensa 4420 laptop.
I wanted to use ddcprobe to detect when an external monitor is attached
and use the proper xorg.conf file. Unfortunately the ddcprobe command
probes the vga port and says "input: analog signal" instead of something
like "input: analog signal disconnected". In other words, ddcprobe is
not delineating between an attached monitor or a detached.
I did notice that the Xorg comand will display a manufacturer make/model
properly when the monitor is attached, and show XXX when detached. But
unfortunately that command creates a lot of brief screen weirdness when
being used for detection and reporting only. I also found I couldn't
capture it's output properly in an if statement in Bash on boot.
I would even tolerate some kind of trick in the Grub boot menu so that I
could pass a kernel parameter for when I want to attach a monitor, then
detect that kernel parameter on boot of services, and then swap the
proper xorg.conf file in. But I don't know how to do that either.
** Affects: ubuntu
Importance: Undecided
Status: New
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The ddcprobe command fails to recognize attached or detached external monitor
https://bugs.launchpad.net/bugs/251366
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