Bug 19232

Created attachment 21391 [details] [review]
xorg.conf

Created attachment 21392 [details] [review]
Xorg.0.log

Created attachment 21393 [details]
glxinfo

Created attachment 21394 [details]
xrandr output

pleaes try this command: "xrandr --output DVI-0 --mode 800x600"

(In reply to comment #5)
> pleaes try this command: "xrandr --output DVI-0 --mode 800x600"

The behavior is *same* with --mode option for those resolutions mentioned as problem.

How about comment out  UseModes  "Modes[0]" in section Section "Monitor", just like:
Section "Monitor"
   ...
#  UseModes     "Modes[0]"
EndSection

(In reply to comment #7)
> How about comment out  UseModes  "Modes[0]" in section Section "Monitor", just
> like:
> Section "Monitor"
>    ...
> #  UseModes     "Modes[0]"
> EndSection

thanks, will try and update you soon.

After some gao, i got some time to look into this:

- I commented the "Use Modes" line, but this time, i just get only 3 basic resolutions available!  800x600 etc

- This time tried with Ubuntu-8.10, i get the same problem.
  --I can't set some higher resolutions above some value, say 1240x1024.
  --In my Ubuntu's xorg.conf file, i don't even have the "Use Modes" line
  --The Virtual value set is 'Virtual 2048 2048'


Any thoughts? or it is the limitation of the card?

(In reply to comment #9)
> After some gao, i got some time to look into this:
> 
> - I commented the "Use Modes" line, but this time, i just get only 3 basic
> resolutions available!  800x600 etc
> 
> - This time tried with Ubuntu-8.10, i get the same problem.
>   --I can't set some higher resolutions above some value, say 1240x1024.
>   --In my Ubuntu's xorg.conf file, i don't even have the "Use Modes" line
>   --The Virtual value set is 'Virtual 2048 2048'
> 
> 
> Any thoughts? or it is the limitation of the card?
> 

There are no limitations in the hw with respect to modes for the most part.  Try removing the monitor and modes sections in your config.  your monitor provides an edid so you should be getting all of the montior's supported modes via the edid.  Also, don't use xrandr -s.  That's a randr 1.0 command and the backwards compat code in the xserver doesn't always do the right thing since xrandr 1.2 support multiple outputs.  use:
xrandr --output DVI-0 --mode <mode name>

Please post your new xorg log and config after remving the monitor and modes sections if you are still having trouble.

 
> xrandr --output DVI-0 --mode <mode name>
> Please post your new xorg log and config after remving the monitor and modes
> sections if you are still having trouble.

Yes, I am using 'xrandr --output DVI-0 --mode <mode name>' most of the time. I stopped using '-s' :-)

Now my observations are:

 -checked the EDID info, and found that the MAX supported resolution is '1280x1024'. And I can successfully change the resolution upto that.

- where as my xrandr -q output shows one thing extra '1400x1050' :

Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 2048 x 2048
DVI-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 380mm x 300mm
   1280x1024      60.0*+   75.0     60.0     60.0* 
   1400x1050      60.0  <==============  WHY IS IT SHOWN?
   1280x960       60.0  
   1152x864       75.0  
   1024x768       75.1     75.0     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     72.8     75.0     60.0     59.9  
   720x400        70.1  
VGA-0 disconnected (normal left inverted right x axis y axis)


- Any clue why it is showing the extra "1400x1050"? I couldn't set this resolution.

- When reduce the 'Virtual 2048 2048' to 'Virtual 1024 1024' i don't get '1400x1050' and infact, i get fewer than listed above.


*** The observation is same whether "Monitor" section present or not. And no 'modes' section in my Ubuntu xorg.conf

Created attachment 22339 [details]
new-xorg-conf

Created attachment 22340 [details]
new-Xorg-log

(In reply to comment #11)
> > xrandr --output DVI-0 --mode <mode name>
> > Please post your new xorg log and config after remving the monitor and modes
> > sections if you are still having trouble.
> 
> Yes, I am using 'xrandr --output DVI-0 --mode <mode name>' most of the time. I
> stopped using '-s' :-)
> 
> Now my observations are:
> 
>  -checked the EDID info, and found that the MAX supported resolution is
> '1280x1024'. And I can successfully change the resolution upto that.

Good.

> - Any clue why it is showing the extra "1400x1050"? I couldn't set this
> resolution.
> 

The Xserver adds default modes that are within the sync range supported by your monitor.  That's where the extra modes come from.  In xserver from git, the default xserver modes should only be added if the edid from your monitor has the continuous frequency bit set since a lot of LCD monitors don't like non-edid modes.  Previous xservers always add the default modes.

> - When reduce the 'Virtual 2048 2048' to 'Virtual 1024 1024' i don't get
> '1400x1050' and infact, i get fewer than listed above.

The virtual line in your config limits the size of your framebuffer.  When you limit the framebuffer to 1024x1024, the xserver culls out modes larger than the framebuffer.

Thanks for the explanation...

closing this bug, as the behavior is correct.