Ubuntu

Comment 2 for bug 830949

I have a dell mini 9. It should be very similar CPU (if not the same) as the N10.
I updated it today.
Following that, I plug in an external monitor (max res 1280x1024) through a VGA cable. I was able to run Unity in these configuration:

laptop: 1024x600 external monitor: 800x600: no major issue to report. Unity works well.

laptop: 1024x600 external monitor: 832x624: no major issue to report. Unity works well.

laptop: 1024x600 external monitor: 1024x768: starting to see some empty regions on the external monitor (black). Probably the limited video memory of the dell mini 9 is kicking in...

laptop: 1024x600 external monitor: 1152x864: unusable

My dell mini 9 system only has 1 GigaByte of RAM so it is possible that past a certain resolution, the system can't handle an external monitor correctly. It is also likely that the driver doesn't provide much help either...

However, I couldn't reproduce the bug as reported here. From the picture of the bug, it looks like the system is trying to drive an HD monitor; probably one with an even higher resolution than my external monitor. So, I wonder if the system has enough RAM for that. Even if it does, we can't be certain how that RAM it is allocated (between the GPU and the CPU).

 - Is it possible to know the details of that particular system (in the picture): how much RAM does it has?
 - What is the resolution of the external monitor?
 - Is it possible to lower the external monitor resolution when setting up a multi-monitor configuration?
 - Does the problem shown in the picture still occurs when the external monitor resolution is at its lowest?