I wonder, why the maximum panning size is so driver dependent.

My ATI Radeon HD 3450 had a maximum panning size of 8192x8192 with the
open source "radeon" and "radeonhd" drivers. With AMD's ATI Catalyst
13.1 Legacy driver I only have a maximum of 1920x1920. The monitor's
native size is Full-HD (1920x1080) and it's connected via Dual-Link-DVI.

$ xrandr -q
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 1920 x 1920
DFP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 510mm x 
287mm panning 1920x1080+0+0
   1920x1080      60.0*+
   1776x1000      60.0 +
   1680x1050      60.0  
[...]

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You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/883319

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

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