Similar issue with Dell U3011

[thwarted]

I had what appears to be a similar issue with a Dell U3011 (revision A0). It wasn't due to the computer, but rather it was a problem with the monitor. It manifested itself in both Linux and Windows. It wasn't related to the cable or the video card (swapped out for different cables and different computers). So not exactly the same, but maybe this gives you some inspiration as to getting to the bottom of the problem.

When certain colors were on the left half of the screen (the threshold was exactly down the middle of the monitor -- I created a background image with the line down the center to confirm), the monitor would display garbage. If a certain percent of the left half was composed of these problematic colors, the monitor would loose sync completely.

You can see what it did in this video: http://www.youtube.com/watch?v=fqmVdx3y6IQ

I collected swatches of all the colors that caused the problem to see if I could detect a pattern (you can see them in the video, those squares in the file manager are the icons for the swatches files).

Called Dell and got a replacement monitor (revision A2), no problems with the replacement.

The list of RGB values that caused this problem:

001b33  764e35  955033
001c32  765026  955927
0059f6  76502b  957e64
005ca3  765125  965128
014dfb  768e64  985834
0303b1  774023  9896ac
0450f1  77542e  98d6f5
051a30  778cb0  a40325
0551f0  77d064  a45025
0650e7  78c4f3  a5d0ed
080425  795731  a78d70
0d1b34  795933  a7d6f3
0e0c34  79c4f2  a7d8f6
204f25  7a0d34  a8caf1
2050b0  7a5027  ac00ac
205125  7a5125  af00af
24571c  7bc4f1  afcbf3
3366ff  7c5025  b9501e
535562  7e4126  b9c5b4
5858f5  7e5127  bcd9a3
5959fc  7f5c72  be4713
5b4025  864027  c5d9f1
6b5933  865025  c64026
733d1b  865026  c9d7f1
754d34  865d27  c9d7f5
764026  885132  d45e78
764027  91c4f6  d94125
76462f  955026  d9bea0
764e34  955027  d9caa3

[oyiptong]

This is pretty nuts! I'll try to reproduce the problem. Thanks for sharing!