Comment 3 for bug 219350

Rates shown in the dialog | What monitor displays when I select the shown mode
1152x864: 56 Hz | 85 Hz
1152x864: 57 Hz | 75 Hz

For the other modes, there are similar differences.

------------- sudo ddcprobe (I had to install xresprobe) shows: -------------
vbe: VESA 3.0 detected.
oem: NVIDIA
vendor: NVIDIA Corporation
product: G71 Board - p492h2 Chip Rev
memory: 262144kb
mode: 640x400x256
mode: 640x480x256
mode: 800x600x16
mode: 800x600x256
mode: 1024x768x16
mode: 1024x768x256
mode: 1280x1024x16
mode: 1280x1024x256
mode: 320x200x64k
mode: 320x200x16m
mode: 640x480x64k
mode: 640x480x16m
mode: 800x600x64k
mode: 800x600x16m
mode: 1024x768x64k
mode: 1024x768x16m
mode: 1280x1024x64k
mode: 1280x1024x16m
edid:
edid: 1 3
id: 0c0d
eisa: MAX0c0d
serial: 01010101
manufacture: 31 2002
input: sync on green, analog signal.
screensize: 32 24
gamma: 2.880000
dpms: RGB, active off, no suspend, no standby
timing: 640x480@60 Hz (VGA)
timing: 640x480@75 Hz (VESA)
timing: 800x600@60 Hz (VESA)
timing: 800x600@75 Hz (VESA)
timing: 1024x768@75 Hz (VESA)
ctiming: 640x480@85
ctiming: 800x600@85
ctiming: 1024x768@85
ctiming: 1024x768@100
ctiming: 1280x1024@75
monitorname: 103085
monitorrange: 30-86, 50-160
monitorserial: AA1030850231
monitorserial: C20400256

------------- xrandr shows: -------------
Screen 0: minimum 320 x 175, current 1152 x 864, maximum 1280 x 1024
default connected 1152x864+0+0 0mm x 0mm
   1280x1024 50.0 51.0
   1280x960 52.0 53.0
   1280x800 54.0
   1280x768 55.0
   1152x864 56.0* 57.0
   1152x768 58.0
   1024x768 59.0 60.0 61.0 62.0 63.0 64.0
   960x600 65.0
   928x696 66.0
   896x672 67.0
   840x525 68.0
   832x624 69.0
   800x600 70.0 71.0 72.0 73.0 74.0 75.0 76.0 77.0
   800x512 78.0
   720x450 79.0
   720x400 80.0
   640x512 81.0 82.0
   640x480 83.0 84.0 85.0 86.0 87.0 88.0
   640x400 89.0 90.0
   640x384 91.0
   640x350 92.0
   576x432 93.0 94.0
   576x384 95.0
   512x384 96.0 97.0 98.0 99.0 100.0
   416x312 101.0
   400x300 102.0 103.0 104.0 105.0 106.0
   360x200 107.0
   320x240 108.0 109.0 110.0 111.0
   320x200 112.0
   320x175 113.0