Ubuntu
xserver-xorg-video-ati package

  1. Bug #575496
  2. Comment #7

Comment 7 for bug 575496

Revision history for this message
In , James H. Cloos Jr. (cloos-jhcloos) wrote :

> Older radeons rarely had edids for the LVDS panel, the vbios lvds
> table only has the panel modeline, not the physical size.

The old radeon driver (back in the xfree86 days) did know that my
laptop’s screen was 12”×9”. I originally added --dpi 133 to my X
startup scripts only because the integer conversions between inch
(for dpi) and mm (for dimensions) led to rounding errors.

To the Reporter: you may need to add --dpi 124 to your startup
scripts to get accurate sizing with the current X server.