Comment 4 for bug 63518

According to the following link, this laptop has a buggy video bios:

  http://www.teleost.org/docs/gma-900-linux.html

Have you tried the solutions described on that page?

In the xorg log file you posted, it looks like the following is the error you're hitting:

(WW) I810(0): config file hsync range 28-64kHz not within DDC hsync ranges.
(WW) I810(0): config file vrefresh range 43-60Hz not within DDC vrefresh ranges.
(II) I810(0): Standardbildschirm: Using hsync range of 28.00-64.00 kHz
(II) I810(0): Standardbildschirm: Using vrefresh range of 43.00-60.00 Hz
(II) I810(0): Increasing the scanline pitch to allow tiling mode (1280 -> 2048).

Have you doublechecked that your monitor's hsync and vrefresh ranges are correct for your hardware?