Display rates -

[poma]

On 01/27/2013 09:54 PM, Bob Goodwin - Zuni, Virginia, USA wrote:
> On 01/27/2013 01:57 PM, Suvayu Ali wrote:
>> xrandr -q
> 
> No that just shows the same thing, the equipment is rated much
> higher.
> 
> [root at Box9 xorg.conf.d]# xrandr -q Screen 0: minimum 320 x 200,
> current 1024 x 768, maximum 8192 x 8192 DVI-0 disconnected (normal
> left inverted right x axis y axis) HDMI-0 disconnected (normal left
> inverted right x axis y axis) VGA-0 connected 1024x768+0+0 (normal
> left inverted right x axis y axis) 0mm x 0mm 1024x768       60.0* 
> 800x600        60.3     56.2 848x480        60.0 640x480        59.9
> 
> And I have had no success with the commands to change it like:
> 
> $xrandr --output LVGA --mode 1680x1050 --rate 60
> 
> Which just gets a help screen, obviously I'm doing something wrong 
> out of ignorance.
> 

Heya,

$ man cvt
$ man xrandr

$ xrandr --newmode "640x480R" 23.50 640 688 720 800 480 483 487 494 +hsync
-vsync
$ xrandr --newmode "800x600R" 35.50 800 848 880 960 600 603 607 618 +hsync
-vsync
$ xrandr --newmode "1024x768R" 56.00 1024 1072 1104 1184 768 771 775 790
+hsync -vsync
$ xrandr --newmode "1280x960R" 85.25 1280 1328 1360 1440 960 963 967 988
+hsync -vsync
$ xrandr --newmode "1280x1024R" 90.75 1280 1328 1360 1440 1024 1027 1034
1054 +hsync -vsync
$ xrandr --newmode "1440x900R" 88.75 1440 1488 1520 1600 900 903 909 926
+hsync -vsync
$ xrandr --newmode "1680x1050R" 119.00 1680 1728 1760 1840 1050 1053 1059
1080 +hsync -vsync
$ xrandr --newmode "1920x1080R" 138.50 1920 1968 2000 2080 1080 1083 1088
1111 +hsync -vsync

CVT(Coordinated Video Timings) with R(reduced blanking intervals) modes
ONLY for LCDs at 'VertRefresh' 60 Hz.

Automation in da display manager style:
/etc/lightdm/lightdm.conf:
display-setup-script=/usr/bin/RandR
…

/usr/bin/RandR:
#!/bin/sh
# ViewSonic VX2035wm
xrandr --newmode "1680x1050R" 119.00 1680 1728 1760 1840 1050 1053 1059
1080 +hsync -vsync >/dev/null 2>&1
xrandr --addmode VGA-0 1680x1050R >/dev/null 2>&1
xrandr --output VGA-0 --mode 1680x1050R >/dev/null 2>&1
exit 0


Cheers,
poma