After research I see the bug is a hardware problem. At higher resolutions the graphics board overloads the memory BUS, causing the little dots and lines on the screen. It happens because the processor has an embedded memory controller (Athlon X2), that is unaware of the graphics board. So the graphics board can't read the RAM in time and it appears random dots and lines on the screen.
So this combination of hardware (Athlon X2 and Sis 661/741/760 embedded) will not work properly with any operational system at higher resolutions (but 800x600 and 1024x768 seems to work well). The solution I took was put a new graphics board with it's own memory. With this new hardware configuration the computer works well. So it is not a software problem. In my oppinion the hardware manufacturer should recal this hardware. :P Ric. -- X shows noise on screen (SiS 661/741- pci id 1039:6330 rev 03) https://bugs.launchpad.net/bugs/592447 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
