Created attachment 61620 [details]
Xorg.log

Trying to get the physical panel size from xrandr, the reported panel height is wrong by a factor x100.

xrandr gives:

    LVDS-1 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 367mm x 23000mm

Checking the Xorg.0.log:

    X.Org X Server 1.12.0
    Release Date: 2012-03-04
    [    47.319] X Protocol Version 11, Revision 0
    ...
    [    48.916] (II) NOUVEAU(0): Max Image Size [cm]: horiz.: 37  vert.: 23
    ...
    [    48.917] (II) NOUVEAU(0): EDID vendor "LPL", prod id 0
    [    48.917] (II) NOUVEAU(0):     EDID quirk: Detailed timings give vertical size in cm.

The Max image size seems correct.

Checking at "Detailed timings give vertical size in cm", it comes from:

http://cgit.freedesktop.org/xorg/xserver/tree/hw/xfree86/modes/xf86EdidModes.c#n239

    {
     quirk_detailed_v_in_cm, DDC_QUIRK_DETAILED_V_IN_CM,
     "Detailed timings give vertical size in cm."},
    {

So DDC_QUIRK_DETAILED_V_IN_CM is set, so the size is x10:

    if (quirks & DDC_QUIRK_DETAILED_V_IN_CM)
        det_mon->section.d_timings.v_size *= 10;

And that comes from:

http://cgit.freedesktop.org/xorg/xserver/tree/hw/xfree86/modes/xf86EdidModes.c#n133

    /* Bug #10304: LGPhilipsLCD LP154W01-A5 */
    if (memcmp(DDC->vendor.name, "LPL", 4) == 0 && DDC->vendor.prod_id == 0)
        return TRUE;

Because the reported product_id is indeed 0:

[    48.916] (II) NOUVEAU(0): Manufacturer: LPL  Model: 0  Serial#: 0

So I suspect the quirk for bug #10304 could make things worse in the case of this panel/laptop.