unable to obtain maximum resolution on widescreen monitor
 

I am having a problem with my resolution. I have a Samsung SyncMaster 906BW 19" widescreen monitor, which should be set at 1440x900. The highest I can set it at however is 1024x768. I am runnint Ubuntu 6.06. Here is my xorg.conf file.

I had the same problem once before and fixed it this way
http://ubuntuforums.org/showthread.php?t=477644

As I mention in that thread, that method is no longer working for some reason. If anyone has any ideas or needs any more info, please let me know.

On the face of it, you would simply have to add the desired mode. Since your default depth is set to 16, try just changing this subsection:

SubSection "Display"
Depth 16
Modes "1400x1050" "1024x768" "800x600" "640x480"
EndSubSection

With my 24" Dell, I had trouble getting it working with basic modes, and had to use a modeline. I found this nifty tool: "gtf"
Here is a relevant link:
http://www.linuxquestions.org/questi...%281280x768%29

OK, I added the resolution to my default depth and that didn't work, so then I used the gtf and added the modeline to my monitor section and that also didn't work. Here is my xorg.conf file now

Any more suggestions?

unable to get beyond 640x480-have tried :
 

-examining xorg.conf- it looks mostly like the example you posted, and definitely has the required higher resolutions
-xvidtune- confirms 640x480- but unable to find xf86config-4 (not in my debian system) as suggested
-sudo dpkg (etc)- but I chickened out because it seemed to be asking me to potentially change too much, not sensible on a system that's otherwise working well?
(Preferences gives no other resolution options)
I have seen a suggestion on a forum somewhere that an old video card (1998 in my case) might be unsupported. Sorry I have also asked for help in reply to another resolution thread here but have tried other things (as above) since.
If advice from experienced users is to assume my video card is too old and leave well enough alone then I will do so. Thanks for reading this!

Try changing Vert Refresh to 59.9-60.1

and

change the Modeline to remove the ".00" at the beginning---ie make it "1440x900_60"

Changes made, still stuck at lower resolution. Here is my xorg.conf now.

I appreciate the effort. I'm sure we must be getting closer to figuring this out. Anyone have any ideas for what to try next?

Add the new resolution to the modes lines:
This has been suggested twice already.
Adding the ModeLine in the monitor section defines that resolution, the same way a "[Modelines]" section would, but you still need to add it to the "[Screen]" section's modes entries.

OK, I went through and added the resolution to each of the mode lines. I restarted X and still nothing so far. Here is the file again.

See anything else missing?

We've all been staring at this and missing a key thing: The Horiz scan is too low!!

I found the manual for this monitor--it specifies: H: 30-81, V: 56-75

Also, If you like math, you'll note that a pixel clock of 100MHz, with 1400 pixels across ==> ~75KHz scan rate.

So change the horiz scan, and it should work. (vert should be OK the way it is.)

Also:

I don't understand this:
The first entry is what you see in a Modeline. I have **never** seen it in Modes. I would just have "1440x900"

The entry in the Modes lines needs to match the name in the modeline that is given in the Screen section. You could name it "snoopy" if you wanted to but that wouldn't make much sense! :)

Well, I am making some progress. I have been tinkering around with you suggestions, and I have gotten a higher resolution. The problem now is that depending on what I set my veritcal and horizontal rates to, I get either too low or too high or a res. It seems to be stuck at 1024x768 until I up the horizontal, then it suddenly jumps to 1280x1024 with an option for 1600x1200. I've played around the numbers quite a bit, moving the ranges up and down slightly and the same thing happens. here is my current file, and the resolution here is 1280x1024.

I feel like we are almost there.

I don't know if this will help, but here is a link to an Ubuntu user who is using the same monitor and posted part of his xorg.conf file.
http://ubuntuforums.org/showthread.php?t=280683&page=3

Maybe this Sync rates will help.

However, I wonder if there may be a problem with the video controller as well. Mention was made about patching i845 but this was before the problem was resolved.