Lower refresh rate using 'nvidia' driver

[gstone]

I have installed the 4349 nvidia drivers on my RedHat 8.0 machine. Previosuly, using the default 'nv' drivers, I was able to run at 1600x1200 @ 85HZ on my Sony G-400 (19"). With the 'nvidia' drivers, my display runs only at 75HZ.

The only change I made to my XF86Config file was to replace the 'nv' with 'nvidia', and to remove the 'Load "dri"' line.

My video card is a Riva TNT-2. Is it the case the accelerated nvidia drivers are incapable of driving my card at the higher refresh rate? Obviosuly the card is physically capable of doing it, as everything worked fine with hte original drivers.

My horizontal and vertical sync lines are correct, and the modelines worked well previously.

Does anybody have any ideas?


From XFree86.0.log:
(II) NVIDIA(0): Monitor0: Using hsync range of 30.00-107.00 kHz
(II) NVIDIA(0): Monitor0: Using vrefresh range of 48.00-120.00 Hz
(II) NVIDIA(0): Clock range: 12.00 to 215.00 MHz
(II) NVIDIA(0): Not using default mode "1024x768" (bad mode clock/interlace/doublescan)
(II) NVIDIA(0): Not using default mode "512x384" (bad mode clock/interlace/doublescan)
(II) NVIDIA(0): Not using default mode "1600x1200" (bad mode clock/interlace/doublescan)
(II) NVIDIA(0): Not using default mode "1792x1344" (bad mode clock/interlace/doublescan)
(II) NVIDIA(0): Not using default mode "1856x1392" (bad mode clock/interlace/doublescan)
(II) NVIDIA(0): Not using default mode "1856x1392" (bad mode clock/interlace/doublescan)
(II) NVIDIA(0): Not using default mode "928x696" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1920x1440" (bad mode clock/interlace/doublescan)
(II) NVIDIA(0): Not using default mode "1920x1440" (bad mode clock/interlace/doublescan)
(II) NVIDIA(0): Not using default mode "960x720" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1920x1200" (bad mode clock/interlace/doublescan)
(**) NVIDIA(0): Validated modes for display device CRT-0:
(**) NVIDIA(0): Default mode "1600x1200": 202.5 MHz, 93.8 kHz, 75.0 Hz
(II) NVIDIA(0): Virtual screen size determined to be 1600 x 1200
(--) NVIDIA(0): Display dimensions: (370, 270) mm
(--) NVIDIA(0): DPI set to (109, 112)

[bwkaz]

Run this:

gtf 1600 1200 85

And put the modeline that it prints into your XF86Config. Then reference the name of that modeline in the Modes line -- instead of saying "1600x1200", use whatever the Identifier of that modeline is.

X (even 4.3.0) probably doesn't have any predefined VESA modes for 1600x1200 and that high of a refresh rate. So manually create one -- that's what this does.