I have a monitor which connects via VGA to hdmi adapter. I see that the screen shows up and prompts me to start the whole process for setting up ubuntu but then the monitor loses connection after 5 seconds.
Is VGA compatible? I wanted to double check before I go out and buy a new monitor.
This is an old thread, but others may benefit… I am successfully using a DisplayPort to VGA adapter to drive an old 10" VGA display. Works well. One note is that the Apple DisplayPort to VGA adapter does not work, but another non-Apple did work fine.
Success probably depends on any EDID added by the adapter. Sometimes a lack of EDID falls back to a mode the monitor supports, but there are some adapters which automatically report some standard modes even if not custom programmed.
So there are two logical display controllers, one has a monitor with EDID detected, the other does not. Copy and paste the data into http://www.edidreader.com to see what the monitor is telling the driver about itself. If the modes reported in the driver support the modes the EDID reports, then those modes can be used. The display controller without EDID will just be a case of luck as to whether it works (or if there isn’t actually a monitor, then I’ll predict no display will work :P).
Note that interlaced modes and extension modes tend to not be supported.