Comment 43 applies to use of xorg.conf in attempting to produce desired
X configuration, e.g. xorg.conf for Intel gfx containing:

Section "Device"
    Identifier "Default Device"
        Option "monitor-VGA1" "Default Monitor"
EndSection

Section "Monitor"
    Identifier  "Default Monitor"
        Option "DPMS" "off"
        DisplaySize 405 253 # 120 DPI @ 1920x1200 & virtual
        Option "PreferredMode" "1440x900"
        Option "Panning" "1920x1200"
EndSection

Section "Screen"
    Identifier  "Default Screen"
        Device  "Default Device"
        Monitor "Default Monitor"
EndSection

produces expected results for server 1.9.3, but not for server
1.16.0RC1. Functional panning matching that produced by the above
xorg.conf can be at least mostly achieved in i915 via xrandr as follows:

xrandr --dpi 120 --fb 1920x1200 --output VGA1 --mode 1440x900 --panning 
1920x1200
        or
xrandr --fbmm 405x253 --fb 1920x1200 --output VGA1 --mode 1440x900 --panning 
1920x1200

A remaining problem therefore exists that did not exist prior to the
server changes made that made this bug report necessary in the first
place, that xorg.conf no longer does what xrandr can, as xorg.conf used
to be able to do. This is new with the 96204 patch, as with the 56408
patch and server 1.12.3, xorg.conf gets the job done as expected.

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https://bugs.launchpad.net/bugs/883319

Title:
  xrandr --scale restricts area in which mouse moves

Status in X.Org X server:
  Confirmed
Status in “xorg-server” package in Ubuntu:
  Fix Released
Status in “xorg-server” source package in Precise:
  Fix Released
Status in “xorg-server” source package in Quantal:
  Fix Released
Status in “xorg-server” source package in Raring:
  Fix Released

Bug description:
  SRU Request:

  [IMPACT]
  A bug in the version of xorg-server in precise prevents users from scaling 
screen resolution. When attempting to do so, as was possible in Natty and 
earlier, and which is possible in Quantal+, the mouse pointer remains locked 
inside the old resolution. This prevents users of small screens such as 
netbooks from scaling to a greater screen resolution.

  [Test Case]
  - On a netbook with intel chipset, such as a Dell Mini 9 or 10, scale the 
display by using the following command:

  xrandr --output LVDS1 --panning 1280x750 --scale 1.25x1.25

  See if the mouse moves correctly to all screen extremities, and is not
  confined by a transparent border at 1024x600

  [Regression Potential]
  This is fixed with a patch backported from the xorg-server version in 
Quantal. In theory it should just affect screen which are scaled and panned, 
which is uncommon. If so, the patch can be backed out.


  
  Original Bug Description:
  in kubuntu (and ubuntu) 11.04 i used to enlarge my laptop screen like so

  xrandr --output LVDS1 --scale 1.2x1.2

  this worked fine: the desktop scaled to larger size correctly .
   After upgrading to 11.10, in kde the desktop still resizes
  correctly, but the movement of the mouse is restricted to an area equal to
  the screen size *before* issuing the scaling command. .. Ie let's say
  the mode is 1366x768 and I do xrandr --output LVDS1 --scale 1.2x1.2 the
  screen size changes to 1640x922 but the mouse moves in an area the size of
  1366x768 in the top left of the screen and then 'hits a wall' preventing
  it to move. I also tried ubuntu 11.10 with gnome: here the screen also
  resizes, but I have the same issue with the mouse, and the extended area
  of the desktop is black...

  Some time ago there was a similar issue, which was resolved later. Now it 
seems
  to be back...

  jos@samsungsucks:~$ lsb_release -rd
  Description:    Ubuntu 11.10
  Release:        11.10

  jos@samsungsucks:~$ xrandr --version
  xrandr program version       1.3.5
  Server reports RandR version 1.3

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