Re: how to center X in the monitor?
For anyone who has this problem, which should be increasingly common as monitor manufacturers remove physical controls from their products, here is the solution.
For a Samsung SyncMaster 970P and the nvidia X driver, use the following modeline:
ModeLine "1280x1024@75NVIDIA" 135.00 1280 1284 1428 1696 1024 1025 1028 1066 +hsync +vsync
I arrived at this using xvidtune and starting with the Mode chosen by the X.org nv driver.
I guess nobody knows why, but the Nvidia driver and the X.org driver treat the same modeline very differently.