How can I adjust the monitor's resolution?

[imaefe]

Hello,

I'm a new user at "ubuntu forums" and I have a problem with my graphics (exactly this one: http://ubuntuforums.org/showthread.php?t=1639124&page=2).

I've got an Intel 845G chipset and a LG Flatron F900P monitor. A friend of mine convinced me to try ubuntu and I installed the 10.10 version. Everything (except the monitor's resolution) works all right. I don't know how to fix it and so I thought realzippy could help me.

My computer is: IBM Net Vista 8305-21G
Chipset: FRU PN 49P1599 (Intel 845G)

Thank you very much in advance,

I apologize, I'm not very good at English.

[imaefe]

By the way, I've already tried with everything realzippy posted in the link.

[realzippy]

Here I am.
Hello and welcome to the forum!

Everything (except the monitor's resolution) works all right.

..to be honest in the moment I am to lazy to read that old thread,but
the problem (not solved) was that resolution was too high.
Is this also your problem?Usually it is too low...

[realzippy]

Let's start with xrandr.

what is the output from:

xrandr

Btw,I just read the thread.Only 2 pages..

Edit:
This (http://www.dealtime.com/LG-Flatron-F900P-19-in/prices) seems to be your monitor,correct?
Which resolution do you want to run?

[imaefe]

Yes that's my problem as well. My current resolution is 2048 x 1536, and the monitor appears as 'unknown'.
And yes, this (http://www.dealtime.com/LG-Flatron-F900P-19-in/prices) is my monitor.

For example, I'd like have a 1280 x 1024 resolution (which is supported as far as I know).

The output from
xrandr is:


xrandr: Failed to get size of gamma for output default
Screen 0: minimum 2048 x 1536, current 2048 x 1536, maximum 2048 x 1536
default connected 2048x1536+0+0 0mm x 0mm
2048x1536 0.0*

[realzippy]

1.Write this down since you won't be able to paste (mind capital "X"):
sudo service gdm stop
sudo Xorg -configure
sudo service gdm start

2.Press Alt+Ctrl+F2
A shell opens,log in with username&password
Type:


sudo service gdm stop



sudo Xorg -configure

a file xorg.conf.new should get created in your user's home folder.


sudo service gdm start

should bring you back.Post the content of created file,can use gedit:



gedit ~/xorg.conf.new

[imaefe]

the content of "xorg.conf.new" is:


Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "/usr/share/fonts/X11/misc"
FontPath "/usr/share/fonts/X11/cyrillic"
FontPath "/usr/share/fonts/X11/100dpi/:unscaled"
FontPath "/usr/share/fonts/X11/75dpi/:unscaled"
FontPath "/usr/share/fonts/X11/Type1"
FontPath "/usr/share/fonts/X11/100dpi"
FontPath "/usr/share/fonts/X11/75dpi"
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
FontPath "built-ins"
EndSection

Section "Module"
Load "extmod"
Load "record"
Load "dbe"
Load "dri"
Load "dri2"
Load "glx"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection

Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection

Section "Device"
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz",
### <percent>: "<f>%"
### [arg]: arg optional
#Option "NoAccel" # [<bool>]
#Option "SWcursor" # [<bool>]
#Option "ColorKey" # <i>
#Option "CacheLines" # <i>
#Option "Dac6Bit" # [<bool>]
#Option "DRI" # [<bool>]
#Option "NoDDC" # [<bool>]
#Option "ShowCache" # [<bool>]
#Option "XvMCSurfaces" # <i>
#Option "PageFlip" # [<bool>]
Identifier "Card0"
Driver "intel"
BusID "PCI:0:2:0"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Viewport 0 0
Depth 1
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 4
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 8
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 15
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

[realzippy]

Ok,will reduce it and modify it to your needs,takes a few minutes.
Meanwhile:
Do you know how to start in recovery mode?
(If the xorg.conf we are going to test results to black screen at boot,
you have to delete the file from recovery mode..)

[realzippy]

When system boots press "shift"...you should get a few kernels to choose
and for every kernel a recovery mode (https://help.ubuntu.com/community/Grub2).
"The user can interrupt the boot process and display the menu by holding down the SHIFT key until the menu displays. ..bla"

...when you got this,I 'll give you the 1rst version of the file to test.

[imaefe]

ok I got it now.

now you can give me the 1st version of the file to test

[realzippy]

run


gksudo gedit /etc/X11/xorg.conf

empty file opens (if not,stop here and post the output !)

paste in:


Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "/usr/share/fonts/X11/misc"
FontPath "/usr/share/fonts/X11/cyrillic"
FontPath "/usr/share/fonts/X11/100dpi/:unscaled"
FontPath "/usr/share/fonts/X11/75dpi/:unscaled"
FontPath "/usr/share/fonts/X11/Type1"
FontPath "/usr/share/fonts/X11/100dpi"
FontPath "/usr/share/fonts/X11/75dpi"
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
FontPath "built-ins"
EndSection

Section "Module"
Load "extmod"
Load "record"
Load "dbe"
Load "dri"
Load "dri2"
Load "glx"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection

Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
HorizSync 30.0 - 111.0
VertRefresh 50.0 - 200.0
EndSection

Section "Device"
Identifier "Card0"
Driver "intel"
BusID "PCI:0:2:0"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Viewport 0 0
Depth 1
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 4
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 8
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 15
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

close file saving changes.
Reboot,fingers crossed.
..if problems boot in recovery mode,log in at shell,run


sudo rm /etc/X11/xorg.conf


sudo reboot


or start low graphics session or kind of (have not been there for a while..)
and delete the file with file browser (nautilus):
/etc/X11/xorg.conf
and restart.

[imaefe]

Hi realzippy!!

I can't believe but now everything's all right, even my screen resolution. Now my monitor is detected as "Goldstar Company Ltd 18" and my resolution is set at 1600 x 1200 (I have a wide range of resolutions available)

No I have to go but I'll tell how it is going

Thanks!!!

[imaefe]

Hello Realzippy!!

As I told you on Friday, it worked perfectly and I have not had any problem with my screen since then. I thought it was going to be pretty difficult to fix it. It's been very easy for me with your help, though.

I just wanted to tell you that I'm very grateful.

thank you!!!

[realzippy]

You are welcome..
One more thing:
Note that we set the values for your monitor in the xorg.conf file

HorizSync 30.0 - 111.0
VertRefresh 50.0 - 200.0

If you now would connect a different monitor,especially a TFT panel,
this will work,but you would get resolutions/refresh rates available the different panel could not handle or even damage it.So if you ever change the monitor,disable
(rename) the file or edit the proper H/Vsync values for the new monitor.

Have fun...

..and set thread as "solved" (threadtools)