1366x768 (0x13b) 62.9MHz *current
h: width 1366 start 0 end 0 total 1366 skew 0 clock 46.1KHz
v: height 768 start 0 end 0 total 768 clock 60.0Hz
OK, that's all within the reach of things. No need to alter anything, unless your monitor is a n c i e n t. Can you correct the picture using the OSD of the monitor? It's no harm posting details of the monitor, graphics card & driver in case they give others ideas. Are you sure you had the --verbose on that? I get this type of thing.
scaling mode: Full aspect
supported: None Full Center Full aspect
1600x900 (0x46) 100.0MHz -HSync -VSync *current +preferred
h: width 1600 start 1648 end 1680 total 1798 skew 0 clock 55.6KHz
v: height 900 start 903 end 909 total 926 clock 60.1Hz
The numbers mean:1600 - right of screen; 1648 - right of invisible area. To allow for crt flyback, there is a delay until 1680 = full left(guessing here); 1798=right of (left side) invisible area. The next dot is 0, meaning the left of the invisible area. You're not getting that stuff, and I wonder why.