Comment 14 for bug 275152

My laptop has this problem (filed duplicate bug report by accident). It's an Inspiron 6000 running Ubuntu Intrepid 32bit; Intel 915 Graphics, and the thing flickers every 5 to 7 seconds, as pointed out here.

I had this thing connected to a projector earlier today (no problems with detection; it automatically resized the displays to 1024x768 and so on) and the flicker manifested as the overhead projector losing the laptop's signal every seven seconds or so. As far as I can recall the laptop screen itself was absolutely stable while this was going on; the "NO SIGNAL ON RGB 1" just kept popping up every seven seconds, for one second.

Unlike the OP, I ONLY see this problem while running X. The display is perfectly solid all the way through the BIOS to the Kubuntu setup screens, to KDM itself where the problem begins. On shutdown, the display is stable as far as I can tell; shutdown is fast and requires a few mode changes of its own.