Re: [opensuse] Suse 11.1 Monitor Resolutions

On Tue, Mar 31, 2009 at 11:52:45AM -0500, David C. Rankin wrote:
Rajko M. wrote:
On Tuesday 31 March 2009 05:35:18 am Dave Feustel wrote:
..
Dave,

I'm running 64-bit Suse 11.0 on MSI K9N Neo V3 motherboard, amd64x2 with
a 19" Acer monitor through a kvm switch. I have the same problem with
OpenBSD 4.4 running on an old Dell, but Fedora 9 runs at 1440x900, also
through the kvm switch. In Suse, an attempt to change the resolution of
the monitor results in a list of possible resolutions that includes
1600x1050 but not 1440x900. My graphics card is NX7300LE TD series.

There are already 2 1440x900 mode lines in Suse 11.0 /etc/X11/xorg.conf.


I suspect KVM swith as culprit.
It probably prevents video driver to read monitor properties contained in
DDC/EDID.

Note that my Fedora 9 system does 1440x900 through the same kvm switch.

You can try first to add to section Monitor:
Option "Metamodes 1440x900"
which should tell driver to use that and not some safe default.

If that alone doesn't work then there is in README.txt included with nvidia
drivers another option:

Option "ConnectedMonitor" "DFP"

DFP stands for Digital Flat Panel"

Below is excerpt:

|ConnectedMonitor
|
| With this option you can override what the NVIDIA kernel module detects is
| connected to your graphics card. This may be useful, for example, if any
| of your display devices do not support detection using Display Data
| Channel (DDC) protocols. Valid values are a comma-separated list of
| display device names; for example:
|
| "CRT-0, CRT-1"
| "CRT"
| "CRT-1, DFP-0"
|
| WARNING: this option overrides what display devices are detected by the
| NVIDIA kernel module, and is very seldom needed. You really only need this
| if a display device is not detected, either because it does not provide
| DDC information, or because it is on the other side of a KVM
| (Keyboard-Video-Mouse) switch. In most other cases, it is best not to
| specify this option.





I Suspect Rajko is right about the kvm switch and the ddc/edid information. You
can also try modifying your xorg.conf to explicitly set your preferred mode and
provide the screen information: (Options of interest marked with >>>)


Section "Monitor"
<snip>
Option "PreferredMode" "1440x900"
EndSection

This option is also in /etc/X11/xorg.conf.

Section "Screen"
Identifier "Screen[0]"
Device "Device[0]"
Monitor "Monitor[0]"
DefaultDepth 24
SubSection "Display"
Depth 15
Modes "1440x900" "1366x768" "1280x800" "1152x864" "1280x768"
"1280x720" "1024x768" "1280x600" "1024x600" "800x600" "768x576" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1440x900" "1366x768" "1280x800" "1152x864" "1280x768"
"1280x720" "1024x768" "1280x600" "1024x600" "800x600" "768x576" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1440x900" "1366x768" "1280x800" "1152x864" "1280x768"
"1280x720" "1024x768" "1280x600" "1024x600" "800x600" "768x576" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1440x900" "1366x768" "1280x800" "1152x864" "1280x768"
"1280x720" "1024x768" "1280x600" "1024x600" "800x600" "768x576" "640x480"
EndSubSection
EndSection

Most of this should be done automatically, but if you are having problems
communicating with the monitor, you may need to specify it manually. Also, you
may also want to specify the modeline for the monitor. Assuming you want
1440x900 with the normal TFT refresh of 60MHz, then specify;

Section "Modes"
Identifier "Modes[0]"
# 1440x900 @ 60.00 Hz (GTF) hsync: 55.92 kHz; pclk: 106.47 MHz
Modeline "1440x900_60.00" 106.47 1440 1520 1672 1904 900 901 904 932
-HSync +Vsync
EndSection

You can also generate modelines for any other resolution and refresh
combinations you want with the gtf utility and 3 parameters, the Width x Height
and Refresh. Syntax is:

gtf Width Height Refresh

Give that a go and post back.

I didn't know about gtf. Thanks!
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