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Old 07-01-04, 03:17 AM   #1
sehh
GFX 5600 VideoSuite
 
Join Date: Oct 2002
Posts: 60
Default physical size of display (calculate DPI)

The physical size of the display is used by the driver to calculate the DPI.

By accident i found that two different sizes are reported, and i'm not sure
which one is correct. Here they are:

$ xdpyinfo | grep dimensions
dimensions: 1280x1024 pixels (342x271 millimeters)

$ grep "dimensions" /var/log/Xorg.0.log
(**) NVIDIA(0): Display dimensions: (340, 270) mm

i'm using a SONY SDM-X73 TFT display
with a native resolution of 1280x1024.

Which one is the right one?
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Old 07-01-04, 09:18 AM   #2
Thunderbird
 
Join Date: Jul 2002
Location: Netherlands, Europe
Posts: 2,105
Default Re: physical size of display (calculate DPI)

I think one of the two (likely the nvidia driver) does some small rounding. For example 342 and 340 mm are about the same, the same for 271 and 270mm. Both give the "same" DPI.
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