I have recently faced with 2 problems with my linux system:

1. Any time that I boot this PC, it gives me this message:
No Optimum Mode, Recommended Mode: 1440X900 60Hz, ? .

The monitor is Samsung SyncMaster 940BW (wide-screen 1440X900). How can I get rid of it?


2. When I try to logon as administrator, it goes to YaST, and when I close it, it goes back to the Usename/Password page. Any idea?

Thank you.

1. The message comes from your monitor - which obviously is a LCD. LCD monitors have fixed resolution, using any other resolution lowers the picture quality, thus the message.
2. You do not reveal what distro you are using. Looks like sensible behavior though. Full rights for management, user rights for using the computer.

Wouldn't it go away if he added "1440x900" to his xorg.conf modes lines? Or is the message before X starts up?

The message probably comes before X starts. For sake of picture quality Xorg should be set to 1440x900 indeed.

Edit: There may be a way to disable it in monitor setup, read the manual.

Here is what I found in the manual:
----------
1. Press Enter at the first and the second screen after executing the X86Config file.
2. The third screen is for setting your mouse.
3. Set a mouse for your computer.
4. The next screen is for selecting a keyboard.
5. Set a Keyboard for your computer.
6. The next screen is for setting your monitor.
7. First of all, set a horizontal frequency for your monitor. (You can enter the frequency directly.)
8. Set a vertical frequency for your monitor. (You can enter the frequency directly.)
9. Enter the model name of your monitor. This information will not affect the actual execution of X-Window.
10. You have finished setting up your monitor.
Execute X-Window after setting other requested hardware.
----------

I don't know what the X86Config file is, and where it is. And, how to execute it?

Also, I don't know how to execute X-Window after setting other requested hardware.

Any idea please?

I forgot to say that I do have a XF86Config (not X86Config) in /etc/X11. In this file, I have added "1440x960" for the default depth (24):


Section "Screen"
Identifier "Screen[0]"
Device "Device[0]"
Monitor "Monitor[0]"
DefaultDepth 24
Option "usevnc" "no"
SubSection "Display"
Depth 15
Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1440x960" "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480"
EndSubSection
SubSection "Display"
Depth 32
Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480"
EndSubSection


No success. And all my questions still exist (how to execute, ...).

.

What exactly are you trying to do now? To get rid of that message or to set the resolution? In first case you should read the monitor's manual and it has nothing to do with Linux. In latter case you have to edit your /etc/X11/xorg.conf, comment out all other modelines and add this one:

Modeline "1440x900@60" 108.84 1440 1472 1880 1912 900 918 927 946

Maybe there is some utility to set it up, we still do not know what distro you have.

I use Linux SuSE.

I want to fix both of them. What I copied and pasted before from the manual was all the inforamtion given in the manual regarding installing the monitor driver in Linux. So, I still need to know how to execute X86Config in order to get the desirable aspect ratio - the monitor is widescreen and as such at the moment all the circular icons look like elliptical - and I need to correct this. The monitor comes with a installation CD but it is just for Windows (at least that's my understanding).

Could you give me some tips please?

To execute the setup script you need to open a terminal window and become root. Then just type it in and press Enter.
However, your desired mode may not exist among the choices. In this case I'd recommend editing XF86Config directly. The monitor section should look like this (replace obvious placeholders):
And screen like this:
Please note, I recommend omitting all modes you do not intend to use. Hope the above will work, I did not test it.

No, it didn't work, and I still have problem with this SAMSUNG-SM940BW monitor. Still, circular shapes are elliptical...I do not understand what is wrong here.

By the way, any time I edit the XF86Config file, should I reboot th computer, or there is another way?

See /var/log for errors in X server log, mine is /var/log/Xorg.0.log.
It is possible your desktop setting overrides video mode, see what modes are listed in KDE control center. (I'm assuming SUSE uses KDE?)
You need to restart X server to validate new configuration file. Ctrl+Alt+Backspace should do it.