I have been hit by the "monitor not detected" problem too, and at several
times. With an old Targa monitor, but also with some laptop LCD's. I think the
problem is very common, but is often mis-diagnosed as a "driver issue".
Since the introduction of a new x-system in Ubuntu 9.x the problems has become
a virtual show-stopper. In the past Ubuntu had a tool to manually select a
monitor that solved the problem. Now users are simply stuck with the default
resolution of 800x600 which is quite unacceptable, especially on a laptop LCD
that can do 1024x768.
Ubuntu 9.x seems to work on the principle that it is always possible to
auto-detect the capabilities of the Monitor, which is simply a fallacy!
There are many reasons why the plug-and-play (auto-detect) mechanism for
auto-detecting the monitor capabilities is simply not present or working. For
example older monitors from the pre- PnP era, or monitors connected through the
VGA port with a VGA to RGB cable (older trinitron monitors, with RGB RCA video
connectors), or LCD's built into older laptop where the PnP mechanism isn't
implemented, ("because the display capabilities are fixed") all simply do not
support the serial EEPROM with PnP monitor data. Or sometimes even if the
monitor has these capabilities its not working for example because of a bad VGA
cable that doesn't have (or it has but its broken) the wires for the serial
EEPROM with the monitor capabilities.
In any of these cases a non-technical user , (one that is lost when told to
edit the xorg.conf file) is simply confined to 800x600, even if the video
hardware and monitor combo can do much higher resolutions.
A capability to manually select a monitor is essential, and should be provided.
--
can't configure display resolution (monitor, graphics card) manually in gui
https://bugs.launchpad.net/bugs/240916
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