Arch Linux

reuben

Member

Registered: 2009-10-07

Posts: 10

nouveau and refresh

I'm trying the nouveau driver with a dual-head setup on my GeForce 7800GS. I have an LCD and a CRT. The CRT is using a 60hz refresh, and I'd prefer a 75hz refresh rate.
I try:

xrandr --output VGA-1 -r 75

All that does is make the screen flickr one time and changes nothing.

Here is the full output from xrandr:

Screen 0: minimum 320 x 200, current 2560 x 1024, maximum 4096 x 4096
DVI-I-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm
   1280x1024      60.0*+   75.0
   1280x960       60.0
   1152x864       75.0
   1024x768       75.1     70.1     60.0
   832x624        74.6
   800x600        72.2     75.0     60.3     56.2
   640x480        72.8     75.0     66.7     60.0
   720x400        70.1
VGA-1 connected 1280x1024+1280+0 (normal left inverted right x axis y axis) 356mm x 266mm
   1280x1024      85.0 +   75.0     60.0*
   1856x1392      60.0
   1792x1344      65.0     60.0
   1920x1200      59.9
   1600x1200      75.0     70.0     65.0     60.0
   1680x1050      84.9     74.9     60.0
   1400x1050      85.0     74.9     60.0
   1440x900       84.8     75.0     59.9
   1280x960       85.0     60.0
   1360x768       60.0
   1280x800       84.9     74.9     59.8
   1152x864       75.0
   1280x768       84.8     74.9     59.9
   1024x768       85.0     75.1     75.0     70.1     60.0     43.5     43.5
   832x624        74.6
   800x600        85.1     72.2     75.0     60.3     56.2
   848x480        60.0
   640x480        85.0     75.0     72.8     72.8     66.7     60.0     59.9
   720x400        85.0     87.8     70.1
   640x400        85.1
   640x350        85.1

Here is my xorg.conf:

Section "Monitor"
        Identifier "NEC"
EndSection

Section "Monitor"
        Identifier "CRT"
        Option  "RightOf" "NEC"

EndSection

Section "Device"
        Identifier      "gf7800gs"
        Driver          "nouveau"
        Option  "Monitor-DVI-I-1" "NEC"
        Option  "Monitor-VGA-1"   "CRT"
EndSection

Section "Screen"
        Identifier      "dual_head"
        DefaultDepth    24
          SubSection "Display"
                Depth 24
                Virtual 2560 1024
          EndSubSection
        Device  "gf7800gs"
EndSection

Section "ServerLayout"
        Identifier      "layout1"
        Screen          "dual_head"
        Option  "AIGLX" "false"
EndSection

Last edited by reuben (2010-02-27 05:15:33)

shining

Pacman Developer

Registered: 2006-05-10

Posts: 2,043

Re: nouveau and refresh

I am doing my monthly check of "nouveau" threads in Arch
All arch nouveau users should just come to #nouveau on freenode, more chances to get a question answered there than here.

01:53 < chithead> you may need to specify a resolution too
01:54 < chithead> also for 1.2 it is --rate

You should have 1.3 though, so maybe try to specify a resolution ?
I never tried that myself, the correct refresh rate was always selected automatically.

Maybe kernel and Xorg logs could help too.

---

pacman roulette : pacman -S $(pacman -Slq | LANG=C sort -R | head -n $((RANDOM % 10)))