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View Full Version : [SOLVED] Resolution Woes (Samsung Monitor)



SharkBreeder
August 27th, 2011, 03:15 PM
I have an intel graphics card, and for some reason Ubuntu (11.04) is not detecting my Samsung SyncMaster 940bW LCD Monitor (1440x900). When I go to Monitor settings to change my resolution, it's marked as "Monitor: Unknown." I can't access anything from the drop down menus. Does anyone know how I can get this to work?

realzippy
August 27th, 2011, 04:40 PM
Syncmasters often have a bad Edid (http://en.wikipedia.org/wiki/Extended_display_identification_data).
Post output from


xrandr -q

SharkBreeder
August 27th, 2011, 05:39 PM
Results of xrandr -q:


xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1440 x 900, current 1440 x 900, maximum 1440 x 900
default connected 1440x900+0+0 0mm x 0mm
1440x900 0.0*

realzippy
August 27th, 2011, 05:44 PM
Which intel card?
post

lspci |grep VGA

...but,according to xrandr,you already run
1440x900.......

SharkBreeder
August 27th, 2011, 05:55 PM
Intel card:

00:02.0 VGA compatible controller: Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset
Integrated Graphics Device (rev 01)

realzippy
August 27th, 2011, 05:59 PM
Just asked to make sure you were not running an I3/5/7 Intel CPU with integrated graphics,which you do not.

Anyway,as mentioned,your resolution seems to be correct.
If you want a lower resolution,this is possible from the terminal,
but I think you do not want this....?

SharkBreeder
August 27th, 2011, 06:08 PM
Just asked to make sure you were not running an I3/5/7 Intel CPU with integrated graphics,which you do not.

Anyway,as mentioned,your resolution seems to be correct.
If you want a lower resolution,this is possible from the terminal,
but I think you do not want this....?

I mostly just wanted to know if I had the ability to switch resolutions, and that nothing was wrong with my system; or my monitor. Thanks for your help.

How do you go by switching resolutions from the terminal?

realzippy
August 27th, 2011, 06:17 PM
There is nothing really wrong with your system,the graphics card/driver just cannot "see" the monitor specific data correctly.
This may be due to a corrupt edid file,a bug in the driver,or even the
monitor cable.
Important thing is that it recognizes the native resolution of your panel,so
your eyes don't hurt. ;-)
To provide other resolutions,you had to use the xrandr tool also.
Check out the web for "xrandr" to get an idea...
But since 1440x900 works,you should spend your linux-time with something useful....eg. my signature.
Please set this thread as solved (ThreadTools)
Have fun!