Comment 3 for bug 830949
Revision history for this message
| Daniel Manrique (roadmr) wrote Re: [Intel N10 Graphics] Plugging in external monitor to VGA port makes both displays corrupted with thick slanted lines | #3 |
Hi Jay,
As with other systems exhibiting this problem, I retested this with the Oneiric image from 20110823. Rather than the corruption as reported by Jeff, on the external screen I see a black background and only the panel, while the internal screen shows some ghosting of windows and is sluggish/
It seems to me that once the Compiz problem out of the way, we hit that other bug again. Also see bug 790824 for a more technical discussion of this behavior.
To answer your questions:
- Is it possible to know the details of that particular system (in the picture): how much RAM does it has?
I can give you any details you need on the Inspiron Mini 1018 which had the same behavior as Jeff described. This has 1 GB RAM. Please let me know if you need any more data.
- What is the resolution of the external monitor?
Native 1280x1024.
- Is it possible to lower the external monitor resolution when setting up a multi-monitor configuration?
Yes :) This is best done by opening a terminal prior to plugging in the external screen and using xrandr to switch modes, as once the external is plugged in, things are too sluggish to use the GUI.
- Does the problem shown in the picture still occurs when the external monitor resolution is at its lowest?
The internal display has 1024x600 resolution. I found that I can bring the external display from 640x480 all the way to 1024x768 and things continue to work fine. The first resolution that fails is 1152x864. At the default resolution for the external monitor (1280x1024) things also don't work.
By the way, I also tried and reported on this under Maverick and Natty for bug 807161 (see comment #9), where the findings were similar: at a low enough resolution, the external display works fine.
Thanks for all your help!