XFree86 incorrectly calculates the display size. When taking into account
two 40x30 cm monitors side by side, it seems to conclude that the total
viewing area is only 40x30, hence causing xdpyinfo to report an incorrect
dimensions: 3520x1440 pixels (403x302 millimeters)
resolution: 222x121 dots per inch
Applications have started to use this information. Mozilla seems to get
very confused, and openoffice displays documents twice as wide as they
should be. There doesn't seem to be any way to override this - even a dpi
value which is specified on the XFree86 commandline gets 'corrected' by the
This has been fixed aparently in XFree86 CVS, and will appear in the
Filing against 7.2 to avoid duplicates.
This seems to be fixed by patch #4986.
Please could you drop it into your 4.1 build tree too?
Created attachment 41008 [details]
XFree86 4.2.0 in rawhide now contains this fix