[Bug 12784] radeon driver misdetects lvds dpi resulting in huge font size

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=12784





------- Comment #2 from chithanh at cs.tu-berlin.de  2007-10-11 16:36 PST -------
Yes, the image size seems wrong. However, the panel size is 330 mm x 210 mm,
which is detected correctly:

(II) RADEON(0): Max H-Image Size [cm]: horiz.: 33  vert.: 21

Also, "hwinfo --vbe" will give 

  Size: 330x210 mm

for the panel. From what I understand about EDID specifications, some smart
person at Acer got confused with this
---
21: Maximum Horizontal Image Size (in centimeters).
22: Maximum Vertical Image Size (in centimetres).
...
66: Horizontal Image Size (in mm)
67: Vertical Image Size (in mm)
68: high significant bits for Horizontal Image Size (4 upper bits)
    high significant bits for Vertical Image Size (4 lower bits)
---
and just copied from bytes 21-22 to 66-67 (setting byte 68 to 0x10 for some
reason), resulting in (256+32) mm x (0+21) mm image size for the standard
timing.
Exactly the same happens in bug 10304.


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