Comment 13 for bug 92599

I have already tried modelines and VertRefresh ranges (43-75 and 60-75). I'll try ModeValidation and AllowNon60HzDFPModes today, also.

Here's the xrandr output:

 SZ: Pixels Physical Refresh
*0 1280 x 1024 ( 382mm x 302mm ) *50 51
 1 1280 x 960 ( 382mm x 283mm ) 52
 2 1280 x 800 ( 382mm x 236mm ) 53
 3 1280 x 768 ( 382mm x 226mm ) 54
 4 1152 x 864 ( 344mm x 255mm ) 55
 5 1024 x 768 ( 305mm x 226mm ) 56 57 58
 6 960 x 600 ( 286mm x 177mm ) 59
 7 840 x 525 ( 251mm x 155mm ) 60
 8 832 x 624 ( 248mm x 184mm ) 61
 9 800 x 600 ( 239mm x 177mm ) 62 63 64 65 66 67
 10 800 x 512 ( 239mm x 151mm ) 68
 11 720 x 450 ( 215mm x 132mm ) 69
 12 640 x 512 ( 191mm x 151mm ) 70 71
 13 640 x 480 ( 191mm x 141mm ) 72 73 74 75
 14 640 x 400 ( 191mm x 118mm ) 76
 15 640 x 384 ( 191mm x 113mm ) 77
 16 576 x 432 ( 172mm x 127mm ) 78
 17 512 x 384 ( 152mm x 113mm ) 79 80 81
 18 416 x 312 ( 124mm x 92mm ) 82
 19 400 x 300 ( 119mm x 88mm ) 83 84 85 86
 20 320 x 240 ( 95mm x 70mm ) 87 88 89
Current rotation - normal
Current reflection - none
Rotations possible - normal
Reflections possible - none

The current mode is marked with an *. As you can see, current refresh rate is 50, although the monitor's OSD indicates 75Hz vertical and 80.0 KHz horizontal refresh at the same time.