problem changing resolution

microcriminal · 07-13-2008, 08:20 AM

installed RHEL 5 on HP DC7700. the motherboard is Intel and video driver is automatically recognized as "i810". i have a wide screen monitor, HP L1908w, and no matter how many times i tried changing the xorg.conf, to change my resolution to 1440x900, it doesn't seem to work.

the interesting thing is, if i make changes changes with system-config-display, then the setting stays. but unfortunately, in there i don't have the option to change it to a wide screen resolution, just the default 4:3 ones.

any idea on what i might do?

Mega Man X · 07-13-2008, 09:54 AM

Can you post your /etc/X11/xorg.conf here? It would be easier for us to see what could be problem (if any) with that file.

Welcome to the forums by the way =)

microcriminal · 07-14-2008, 02:48 AM

thanks Mega Man X! this is one of the biggest Linux forums afaik? hopefully will stick around.
and the latest /etc/X11/xorg.conf is in my next post...

lazlow · 07-14-2008, 03:03 AM

Quote:

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

Quote:

Modes "1440x900" "1280x800"

Your modes and modeline have to match. You either need to make them both "1440x900" or both "1440x900@60". Actually I THINK you could call them both "Herby is Happy" and it would not care, as long as they matched.

microcriminal · 07-14-2008, 05:37 AM

i changed them but still no luck. here is the updated xorg.conf:

Code:

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

Section "Module"
        Load  "dbe"
        Load  "extmod"
        Load  "fbdevhw"
        Load  "glx"
        Load  "record"
        Load  "freetype"
        Load  "type1"
        Load  "dri"
EndSection

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

Section "Device"
	Identifier  "Videocard0"
	Driver      "i810"
EndSection

Section "Monitor"
	Identifier   "Monitor0"
	ModelName    "HP L1908w"
	HorizSync    24.0 - 83.0
        VertRefresh  50.0 - 76.0
	DisplaySize  412 260
	Option  "DPMS"
	Modeline "1440x900" 106.5 1440 1520 1672 1904 900 903 909 934 -hsync +vsync
EndSection

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

the mode is not being listed in:
1. System -> Administration -> Display (system-config-display)
2. System -> Preferences -> Screen Resolution (gnome-display-properties)

all i see are the four default resolutions i.e. 1280x1024, 1024x768, 800x600 and 640x480

lazlow · 07-14-2008, 01:55 PM

You did log out after you made the changes?

microcriminal · 07-14-2008, 03:32 PM

yes. i did. in fact i also restarted the Xorg server. like you do by hitting Ctrl+Alt+Backspace. i mean the configuration seems to load without any error messages or whatsoever but there is no visible effect however.

forrestt · 07-14-2008, 03:51 PM

Have you seen an tried this?

HTH

Forrest

microcriminal · 07-17-2008, 06:03 AM

ha forrest! thanks! that worked for me!
now i get my screen to be 1440x900 but with a new problem!

the problem being: a part of my screen is not visible and when i auto adjust my monitor, it randomly removes a bit of the upper portion or the lower portion and then displays! also, my monitor keeps saying that current input setting is 1152x870 but clearly when i take a screenshot, it is 1440x900.

here is the current xorg.conf

Code:

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

Section "Module"
	Load  "dbe"
	Load  "extmod"
	Load  "fbdevhw"
	Load  "glx"
	Load  "record"
	Load  "freetype"
	Load  "type1"
	Load  "dri"
EndSection

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

Section "Monitor"
	Identifier   "Monitor0"
	ModelName    "HP L1908w"
	DisplaySize	401	256
	HorizSync    24.0 - 83.0
	VertRefresh  50.0 - 76.0
	ModeLine     "1440x900" 106.5 1440 1520 1672 1904 900 903 909 934
	Option	    "DPMS"
EndSection

Section "Device"
	Identifier  "Videocard0"
	Driver      "i810"
EndSection

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

iacobdoc · 02-01-2012, 03:32 AM

I know it would be out of scope by now, yet there is the answer.

I bought a HP L1908w monitor, second hand and use it with a Ubuntu 11.04 and nvidia graphic card.

I had the same problem as you.
I've edited /etc/X11/xorg.conf adding part of your xorg.conf but maintaining the "Device" section as it was.
I've added "Screed" and "Monitor section" as in your xorg.conf but updating the Device to "Default device" as in original xorg.conf
Everything works fine.
Sometimes, changing everything is not a good idea.

Section "Device"
Identifier "Default Device"
Option "NoLogo" "True"
EndSection

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

Section "Monitor"
Identifier "Monitor0"
ModelName "HP L1908w"
HorizSync 24.0 - 83.0
VertRefresh 50.0 - 76.0
DisplaySize 412 260
Option "DPMS"
Modeline "1440x900" 106.5 1440 1520 1672 1904 900 903 909 934 -hsync +vsync
EndSection