can´t alter display resolution on new dapper install

[Gene Heskett]

On Wednesday 30 May 2007, Paul S wrote:
>anthony baldwin said the following on 05/30/2007 07:14 AM:
>> My wife bought a new computer, with xpmedia edition, and asked me to
>> install Linux for her to give it a try.
>> (She´s used windows forever, but has seen my use Linux since we married,
>> and noted how
>> I don´t have any of the viruses, crashes, etc., and wants to give it a
>> shot.)
>>
>> I partitioned the drive and installed dapper (since that´s what I´m
>> still using, being slow to
>> adopt upgrades until bugs are worked out), and everything went lovely,
>> except,
>> the display is set at 640 x 480.
>> Her graphics card and monitor should allow at least 1024 x 768.
>> I can see these options in the xorg.conf,
>> but don´t seem to be able to modify the value in the systems preferences
>> application,
>> even in administrator mode.
>>
>> any assistance would be deeply appreciated.
>>
>> tony
>
>You don't say what video card and driver you are using, so my idea may
>not work for you.
>
>Try opening a terminal and typing "xrandr -q" to get a listing of all
>the available resolutions that are enabled in your current xorg session.
>    For me, I see something like this:
>
>paul :~$ xrandr -q
>  SZ:    Pixels          Physical       Refresh
>*0   1280 x 1024   ( 382mm x 302mm )  *75   70   60
>  1   1280 x 720    ( 382mm x 302mm )   60
>  2   1152 x 864    ( 382mm x 302mm )   75   70   60
>  3   1024 x 768    ( 382mm x 302mm )   75   72   70   60
>  4    800 x 600    ( 382mm x 302mm )   75   72   70   60   56   47
>  5    720 x 480    ( 382mm x 302mm )   60
>  6    640 x 480    ( 382mm x 302mm )   75   72   60
>  7    640 x 400    ( 382mm x 302mm )   75   60
>  8    512 x 384    ( 382mm x 302mm )   75   60
>  9    400 x 300    ( 382mm x 302mm )   75   60
>  10   320 x 240    ( 382mm x 302mm )   75   60
>  11   320 x 200    ( 382mm x 302mm )   75   60
>Current rotation - normal
>Current reflection - none
>Rotations possible - normal
>Reflections possible - none
>
>Next, if you see the desired resolution (1024x768) is available, you can
>select it from the terminal with "xrandr -s 1024x768".  If this works,
>then you should be able to manually edit xorg.conf and change the
>"modes" lines to only have the "1024x768".
>
>If this doesn't work, you might get more help by posting your xorg.conf
>and the results of "xrandr -q".
>
>HTH,

In my case it doesn't, on a kubuntu-6.06 system that is stuck at 1024x768, 
much less than the card and the monitor have demo'd that they can work at, 
all I can get out of that command, as the user or sudo'd, is "can't open 
display."

The card and monitor can work at 1600x1200 under previous installs and I would 
like very much to restore that resolution, since that machines main job is 
running emc2.  A cnc control application that draws a nice backplot of what 
the machine is going to do, and traces it as it does it when running the 
gcode program.


-- 
Cheers, Gene
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