Comment 15 for bug 830949

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Daniel Manrique (roadmr) wrote : Re: [Intel N10 Graphics] Plugging in external monitor to VGA port makes both displays corrupted with thick slanted lines

Hi!

I'm testing this fix (actually the one for 824099) on a couple of N10-based systems (Dell Latitude 2110 and Dell Inspiron Mini 1018).

Native panel resolution is 1366x768 on the Latitude 2110 and 1024x600 on the Mini 1018.

When I plug in the external monitor, it doesn't get activated automatically. I need to go into the "displays" panel and set it to "On". The external monitor is 1280x1024. As expected, if I just click "Apply", I get a dialog asking me to arrange things so they fit within 2048x2048 or use Ubuntu 2d.

If I make things fit within the required resolution (either by reducing resolutions or by arranging the display, for instance, vertically so the total resolution is 1024x1624) things work well, the second display gets activated correctly and performance is good, no sluggishness or crashes.

On the Latitude 2110 I can't bring the external display resolution low enough for a side-by-side arrangement (lowest allowable is 800x600, so on the horizontal total resolution is 2166). But a vertical arrangement, even at 1280x1024 for the external display (total display size is 1366x1792) works fine.

I also tried rotating the displays and as long as the resolutions fit within the 2048x2048 box, everythinig works fine.

As for the software, these systems were installed from an image dated 20111003 and then dist-upgraded to the latest packages today.

Thanks for this fix!