Xfdesktop with xorg virtual resolution

Brian J. Tarricone bjt23 at cornell.edu
Mon Nov 14 21:33:41 CET 2005

Hash: SHA1

On 11/14/2005 9:02 AM, Nick Deubert wrote:
>>>Now with that out of the way I have one issue/possible bug... I set my 
>>>xorg to use a virtual resolution of 1024x768 and actual resolution is 
>>>640x480(im using a really small screen). This works fine when starting X 
>>>alone (with startx), the screen scrolls in all directions fine when i 
>>>move the mouse to the edge. Then as soon as I launch xfdesktop (with or 
>>>without xfce4-session) the desktop gets locked in at 640x480. and I can 
>>>no longer scroll arround. I know this used to work because I used to use 
>>>it all the time and lastly I'm using the vesa driver if that matters. Is 
>>>this explicity disabled? Is there an option or something to allow this?
>>This really makes no sense to me, as xfdesktop doesn't touch your
>>display settings.  It just asks GDK (which asks X) what the screen size
>>is.  Perhaps the Display MCS plugin settings are overriding your
>>xorg.conf, and the timing is just a coincidence?
> Sorry let me try explaining this differently...
> xorg.conf:
> SubSection "Display"
>        Viewport   0 0
>        Modes   "640x480"
>        Depth     24
>       Virtual     1024 768
> EndSubSection
> This is what I did to try and narrow it down somewhat....
> from the first terminal I run:
> $ X& (it launches fine)
> $ export DISPLAY=:0.0
> $ xterm (a window manager-less window appears in the top right of the X 
> server... if i move the mouse to the edge of the right side of the 
> screen, then xterm  scrolls off the left side which is correct)
> $ xfdesktop& (now xfdesktop starts but its wallpaper size is only 
> 640x480 and I cannot scroll off the screen anymore

Yep.  Running xfdesktop is just a coincidence.  xfdesktop requires
xfce-mcs-manager, and so starts it.  The Display settings panel is a
part of the MCS manager, and applies its settings.  You could try
deleting ~/.config/xfce4/mcs_settings/display.xml; not sure if that
would work, though.  This really has nothing to do with xfdesktop.  I
think if you started xfwm4, or xfce4-panel, or any of the other apps
that depend on the MCS manager, you'd see the same thing happen.  I
think.  But either way, this is the MCS manager messing with your
display geometry, not xfdesktop.


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