wrong dpi after update

[Alex Deucher]

On Dec 31, 2007 8:59 PM, Bernd Schubert <bernd-schubert at gmx.de> wrote:
> Hi,
>
> I'm using Debian Sid on my desktop system, but I did the last update some
> weeks ago. After updating today several parts of X got updated and now
> something goes wrong with display-size detection and hence the display dpi
> is wrong (as are all font sizes).
>
> (II) RADEON(0): Supported additional Video Mode:
> (II) RADEON(0): clock: 162.0 MHz   Image Size:  367 x 275 mm
>
> bernd at bathl ~>xrandr
> Screen 0: minimum 320 x 200, current 1600 x 1200, maximum 1600 x 1200
> VGA-0 disconnected (normal left inverted right x axis y axis)
> DVI-0 connected 1600x1200+0+0 (normal left inverted right x axis y axis)
> 367mm x 275mm
>    1600x1200      60.0*+   59.9
>
> But:
>
> (II) RADEON(0): EDID Version: 1.3
> (II) RADEON(0): Digital Display Input
> (II) RADEON(0): Max H-Image Size [cm]: horiz.: 41  vert.: 31
> (II) RADEON(0): Gamma: 2.20
>
> 410x310 mm is the correct display size, but somehow by default 367x275 mm
> are used. And even though EDID provides correct information?
> Setting the correct value with "xrandr --fbdev 410x310" does work, but in
> the past this did work automatically?

Both numbers are coming from the edid.  We use the size from the
detailed timing block (367 x 275 mm).

Alex