Bug 840271 - wrong dimension and dpi
wrong dimension and dpi
Product: Fedora
Classification: Fedora
Component: xorg-x11 (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: X/OpenGL Maintenance List
Fedora Extras Quality Assurance
Depends On:
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Reported: 2012-07-15 05:04 EDT by Jean-Jacques Sarton
Modified: 2013-02-26 10:17 EST (History)
3 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-02-26 10:17:31 EST
Type: Bug
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Description Jean-Jacques Sarton 2012-07-15 05:04:24 EDT
Description of problem:
The xorg server with the nouveau driver don't report correctly the display size and the calculated DPI

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. use a system with a display with a DPI other as 96 dpi
Actual results:
Within Xorg.0.log you will see that the monitor width and height in cm is recognized and that a dpi is calculated:
[ 12694.936] (--) NOUVEAU(0): Chipset: "NVIDIA NV49"
[ 12695.025] (II) NOUVEAU(0): Max Image Size [cm]: horiz.: 37  vert.: 23
[ 12695.025] (II) NOUVEAU(0): clock: 161.6 MHz   Image Size:  367 x 230 mm
[ 12695.027] (**) NOUVEAU(0): Display dimensions: (370, 230) mm
[ 12695.027] (**) NOUVEAU(0): DPI set to (131, 132)
Expected results:

xrandr report correct values but xdpyinfo which call XDisplayWidthMM() and
XDisplayHeightMM() report values based on 96 dpi.
If the xorg.conf file contain the option "DisplaySize 372 231" the values reported by xdpyinfo are correct.

Additional info:
Comment 1 Marek Goldmann 2012-07-16 03:21:39 EDT
Reassigning from me, since I'm not the component owner for this.
Comment 2 Daniel Maia 2012-10-06 09:31:35 EDT
I also have the same problem with the Dell Precision M4600 laptop and Nvidia Quadro card. xdpyinfo gives the wrong screen dimensions and dpi while xrandr gets it right.
Comment 3 Fedora End Of Life 2013-01-16 16:05:59 EST
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Comment 4 Fedora End Of Life 2013-02-26 10:17:34 EST
Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is 
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