Video driver seems to ignore modeline

[phong at phong.org]

> And with "NoDDC" you get no image.  Ok, was does the logging say
> when that happens?

Oh, sorry...

-----------------------------------------
...
(II) RADEON(0): Not using default mode "800x600" (bad mode
clock/interlace/doublescan)
(II) RADEON(0): Not using default mode "1600x1200" (hsync out of range)
(II) RADEON(0): Not using default mode "800x600" (bad mode
clock/interlace/doublescan)
(II) RADEON(0): Not using default mode "1600x1200" (hsync out of range)
(II) RADEON(0): Not using default mode "800x600" (bad mode
clock/interlace/doublescan)
(II) RADEON(0): Not using default mode "1792x1344" (hsync out of range)
... a few billion lines like that ...
(--) RADEON(0): Virtual size is 1600x1200 (pitch 1600)
(**) RADEON(0): *Mode "1600x1200-Dell": 162.0 MHz, 75.0 kHz, 60.0 Hz
(II) RADEON(0): Modeline "1600x1200-Dell"  162.00  1600 1672 1864 2160  1200
1201 1204 1250 +hsync +vsync
(**) RADEON(0): *Default mode "1400x1050": 122.0 MHz, 64.9 kHz, 60.0 Hz
(II) RADEON(0): Modeline "1400x1050"  122.00  1400 1488 1640 1880  1050 1052
1064 1082 +hsync +vsync
...
-----------------------------------------

It appears to be unmunged with the NoDCC option.  I tried both with and without
the "+hsync +vsync" bit which didn't seem to make a difference.