GDM not using entire screen

[ciphermonk]

I'm experiencing an issue with GDM on my T61. When the login screen loads, it's not taking up the entire screen. It looks like it's an 800x600 window in the upper right of the screen. I'm running the intel X3100 card with the intel driver. Anyone else experience this? If so, what did you do to fix it. the native res of the screen is 1440x900.
_________________

[glennzo]

Can I assume that you have the same problem after you log in? Did you look at System > Preferences > Hardware > Screen Resolution?

[ciphermonk]

Yessir. The max resolution shown in there is 1024x768 although my display is in fact totally full at 1440x900

[glennzo]

In your /etc/X11/xorg.conf file, if the section in red doesn't exist, try adding it.
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1440x900" "1280x800"
EndSubSection
EndSection
Then restart your session.

[ciphermonk]

Nope... no cigar.... I did that and it didn't make a difference. Any other suggestions?

[ciphermonk]

It's like xorg isn't seeing the capabilities of the LCD or something yet once I login, the desktop covers the whole screen. strange eh?

[into_311]

Have you checked the monitor sync rates also?

Those are usually set in your /etc/X11/xorg.conf where it says:

Section "Monitor"
Identifier "Monitor0"
HorizSync 30.0 - 83.0
VertRefresh 50.0 - 76.0
End Section

I also assume you have restarted your X server after making all these changes by pressing ctrl-alt-del or rebooting?

NOTE: Those refresh rates are taking from my 1280x800 WXGA lcd monitor. I wouldn't recommend you using those on yours. I would check your manufacturer's website for those specs...

[ciphermonk]

My xorg.conf


Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Synaptics" "CorePointer"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Synaptics"
Driver "synaptics"
Option "Device" "/dev/input/mice"
Option "Protocol" "auto-dev"
Option "Emulate3Buttons" "yes"
EndSection

Section "Monitor"
Identifier "Monitor0"
ModelName "LCD Panel 1440x900"
HorizSync 31.5 - 100.0
VertRefresh 59.0 - 75.0
Option "dpms"
Modeline "1440x900" 106.47 1440 1520 1672 1904 900 901 904 932 -HSyn
EndSection

Section "Device"
Identifier "Videocard0"
Driver "intel"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1440x900"
EndSubSection
EndSection

[glennzo]

Your xorg.conf
Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Synaptics" "CorePointer"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Synaptics"
Driver "synaptics"
Option "Device" "/dev/input/mice"
Option "Protocol" "auto-dev"
Option "Emulate3Buttons" "yes"
EndSection

Section "Monitor"
Identifier "Monitor0"
ModelName "LCD Panel 1440x900"
HorizSync 31.5 - 100.0
VertRefresh 59.0 - 75.0
Option "dpms"
Why is the following here? Is this the 'stock' xorg.conf? I'd remove it.
Modeline "1440x900" 106.47 1440 1520 1672 1904 900 901 904 932 -HSyn
EndSection

Section "Device"
Identifier "Videocard0"
Driver "intel"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Edit this line Modes "1440x900" "1280x800"
EndSubSection
EndSection

After you make these changes type startx. See if there's any improvement.