The system: Dual Xeon HP machine running Redhat 9 with an nvidia Quadro FX1100. and a ViewSonic P815 21" monitor.

What I would like to do: Run the system with a resolution of 1280x1024 and a refresh rate of something between 100 and 120Hz. The monitor should support this combination, but right now it only will do 85Hz at 1280x1024. I need a faster refresh for stereo viewing.

Thanks in advance,

Dave

Although it doesn't seem very helpful here, this is my lspci output:

00:00.0 Host bridge: Intel Corp. E7505 Memory Controller Hub (rev 03)
00:01.0 PCI bridge: Intel Corp. E7000 Series Processor to AGP Controller (rev 03)
00:1d.0 USB Controller: Intel Corp. 82801DB USB (Hub #1) (rev 01)
00:1d.1 USB Controller: Intel Corp. 82801DB USB (Hub #2) (rev 01)
00:1d.7 USB Controller: Intel Corp. 82801DB USB2 (rev 01)
00:1e.0 PCI bridge: Intel Corp. 82801BA/CA/DB/EB PCI Bridge (rev 81)
00:1f.0 ISA bridge: Intel Corp. 82801DB LPC Interface Controller (rev 01)
00:1f.1 IDE interface: Intel Corp. 82801DB Ultra ATA Storage Controller (rev 01)00:1f.5 Multimedia audio controller: Intel Corp. 82801DB AC'97 Audio Controller (rev 01)
01:00.0 VGA compatible controller: nVidia Corporation: Unknown device 034e (rev a1)
05:02.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5702 Gigabit Ethernet (rev 02)
05:0c.0 SCSI storage controller: Adaptec AIC-7902 U320 (rev 03)
05:0c.1 SCSI storage controller: Adaptec AIC-7902 U320 (rev 03)
05:0e.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5782 Gigabit Ethernet (rev 03)


I am also including some of the sections of the XF86Config file.

Section "Monitor"

# be sure to replace these values with values appropriate for your
# monitor!
Identifier "MyMonitor"
VendorName "HP"
ModelName "HPmonitor"
HorizSync 30.0 - 115.0
VertRefresh 50.0 - 160.0
EndSection

Section "Device"

# update this with the PCI id of your card. Consult the output
# of the 'lspci' command.
Identifier "NV AGP"
Driver "nvidia"
VendorName "nvidia"
BoardName "Unknown video card"
BusID "PCI:1:0:0"
EndSection

Section "Screen"

### TWINVIEW SETUP ###
#Option "TwinView" ""
#Option "TwinViewOrientation" "string"
#Option "SecondMonitorHorizSync" "30.0 - 96.0"
#Option "SecondMonitorVertRefresh" "30.0 - 85.0"
#Option "ConnectedMonitor" "CRT, CRT"
### OTHER COMMON OPTIONS ###
#Option "Overlay" "on"
#Option "CIOverlay" "on"
Identifier "Screen AGP"
Device "NV AGP"
Monitor "MyMonitor"
DefaultDepth 24
Option "Stereo" "3"
Option "NvAGP" "3"
#Option "MetaModes" "1280x1024, 1280x1024"
SubSection "Display"
Depth 8
Modes "1280x1024" "1024x768" "800x600" "640x400"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480" "640x400"
EndSubSection
EndSection

Hi.

Replace:
HorizSync 30.0 - 115.0
VertRefresh 50.0 - 160.0

with:
HorizSync 30.0 - 117.0
VertRefresh 50.0 - 180.0

Dave

Thanks for the suggestion,
No luck, still at 85Hz. I am curious how it decides on a resolution/refresh rate combination. Since I don't specify one and all it has is a list range of values and a list of resolutions, how does it know that 85Hz is even safe? Obviously it is below the highest resolution, but if I told it to use resolution 1920x1440 it might explode at 85Hz.

Any ideas?

X tries the first resolution in your default depth mode line, using the highest vertical refresh it can, then tries lower and lower refresh rates until it finds one that the monitor can use (the first one it tries should be the one it uses if your XF86Config is set up correctly (or so I'm led to believe). There is a list of standard resolutions that X will use (e.g. you can't ask for something random like 1234x2000), but I don't know the contents of the list, or where to find it.

You could try refresh rates that are just out of spec, and your monitor shouldn't blow up (it'll probably just go blank, or display a message that the refresh rate is too high). Try upping the upper bound on the HorizSync and VertRefresh values until you find something that works.

Have a look at this too:
http://www.hut.fi/Misc/Electronics/f...2rgb/calc.html

Dave

P.S. Usual disclaimers apply - if your monitor blows up, it's not my fault.