Comment 7 for bug 1292438

seem graphic driver complain about your LVDS no spaker allocation in EDID because your LG does not support audio

LVDS connected 1600x900+0+0 (0x47) normal (normal left inverted right x axis y axis) 382mm x 215mm
 EDID:
  00ffffffffffff0030e47a0200000000
  00130103802615780aa8c09d58509a26
  1c505400000001010101010101010101
  0101010101012f2640b860840c303030
  23007ed7100000190000000000000000
  00000000000000000000000000fe0000
  00004c47446973706c61790a000000fe
  004c503137335744312d544c433300c2

Manufacturer: LGD Model 27a Serial Number 0
Made week 0 of 2009
EDID version: 1.3
Digital display
Maximum image size: 38 cm x 21 cm
Gamma: 2.20
Supported color formats: RGB 4:4:4, YCrCb 4:2:2
First detailed timing is preferred timing
Established timings supported:
Standard timings supported:
Detailed mode: Clock 97.750 MHz, 382 mm x 215 mm
               1600 1648 1696 1784 hborder 0
                900 902 905 912 vborder 0
               -hsync -vsync
Manufacturer-specified data, tag 0
ASCII string:
ASCII string: LP173WD1
Checksum: 0xc2 (valid)
EDID block does NOT conform to EDID 1.3!
 Missing name descriptor
 Missing monitor ranges
 Detailed block string not properly terminated