Hello,
I need some help setting the video resolution for Ubuntu 10.04. The problem is when I run Ubuntu 8.04 from the CD I can run the following resolutions without any problems;

1600x1200 (4:3) 60Hz
1440x900 (16:10) 60Hz
1360x768 (16:9) 60Hz
1280x1024 (5:4) 60Hz
1280x720 (16:3) 60Hz

When I run Ubuntu 10.04 I can only run up to "1280x720 (16:9) 60Hz", it will show 1920x1080 available in the menu to select, but it will not sync the screen. I would like to run at the 1920x1080, 1440x900, or 1360x768.

Therefore, are there any files I can copy from 8.04 to 10.04 to fix this problem? Or, is there some setting I can change in 10.04 to fix this problem?

I am running an IBM Xseries206 with an on-board video board. I did not have to load any video drivers to get the 8.04 to work properly.

Any thoughts???

1280x720 is certainly not a 16:3 ratio, but that's a detail.

In the Screen section of /etc/X11/xorg.conf, put the line

Virtual 1440 900

and try again.

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Is this correct?

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
Virtual 1440 900
EndSection

BTW: When I boot up in 8.04 I notice that the Chipset Driver is VESA. How can I just make that the default driver for 10.04?

post output of

#lspci -vv

X log files in /var/log

vesa is not a good driver

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You probably need a custom /etc/X11/xorg.conf file.
as root from the console with no X running will give you a basic xorg.conf file which you can then modify to add the apprpriate modelines. Use the program gtf to determine the proper modelines. As an example, here are the Monitor and Screen sections of my xorg.conf file

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There is not a switch -VV ???
type the exact command as it should appear on the command line for me please so I can get the data you want.

I was reading up on the Xorg configuration file, but I do not know how I should set it up. Is there a manual for this somewhere on-line?

man xorg.conf will get you the man page (I'm sure it's also online somewhere), but I've always found it a lot easier to start with a valid (if not viable) xorg.conf file and modify it until it works.

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# is the shell prompt

#lspci -vv

lspci -vv > abc.txt (will put it in the file abc.txt)

Also you need to write a modern xorg.conf (not like the one indicated in the other posts) based on the log files in /var/log

Monitor identifiers should be from that file etc

X as supplied by ubuntu 10.04 sometimes has trouble with reading a monitor's EDID.
The solution for me (to get 1920x1080) was to tell X to get the EDID data from the /proc filesystem.
Then it worked after restarting X

Here's the addition to xorg.conf
Maybe this'll work for you.

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OK, I have the system working now, thanks to everyone for there help.
This is what I had to do to get it working.

Step 1 - Stop X from running so I could modify the xorg.conf file and get EDID data.

# sudo /etc/init.d/gdm stop
# startx -- -logverbose 6

Step 2 - Open the Xorg.0.log file to read the EDID data (Modeline for Monitor)

# nano /var/log/Xorg.0.log

Step 3 - Edit xorg.conf file with "Modeline" data.

# nano /etc/X11/xorg.conf

****** Here is my Config Data *******

Section "Device"
Identifier "Configured Video Device"
Driver "ati"
EndSection

Section "Monitor"
Identifier "LG47LH30"
HorizSync 30.0 - 101.0
VertRefresh 59.0 - 160.0
Modeline "1920x1080" 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync
Modeline "1600x1200" 162.00 1600 1664 1856 2160 1200 1201 1204 1250 +hsync +vsync
Modeline "1280x1024" 108.00 1280 1328 1440 1688 1024 1025 1028 1066 +hsync +vsync
Modeline "1280x720" 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync
Modeline "1024x768" 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync
Modeline "800x600" 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync
Modeline "720x400" 28.32 720 738 846 900 400 412 414 449 -hsync +vsync
Modeline "640x480" 25.18 640 656 752 800 480 490 492 525 -hsync -vsync

# Option "PreferredMode" "1280x720"

EndSection

Section "Screen"
Identifier "Default Screen"
Device "Configured Video Device"
Monitor "LG47LH30"
DefaultDepth 16
SubSection "Display"
Depth 16
Modes "1920x1080" "1600x1200" "1280x1024" "1280x720" "1024x768"
EndSubSection

EndSection


***************************

Step 4 - Run dpkg for X

# sudo dpkg-reconfigure xserver-xorg

Step 5 - test new xorg.conf file. If video resolution change it works. Type exit to go back to shell.

# sudo xinit -- :2


Step 6 - Restart gdm

# sudo /etc/init.d/gdm start


That's it!
Also, here are some links I found helpfull...
http://www.mythtv.org/wiki/Modeline_Database
http://ubuntuforums.org/showthread.php?t=83973 (How to change your Resolution)
http://www.x.org/archive/X11R6.8.0/d...f.5.html#toc12

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