Nouveau - Jan 2010 - [Bug 26194] New: nouveau reports DPI correctly in Xorg.0.log, but value reported by X incorrect

http://bugs.freedesktop.org/show_bug.cgi?id=26194

           Summary: nouveau reports DPI correctly in Xorg.0.log, but value
                    reported by X incorrect
           Product: xorg
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: minor
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: bjt23 at cornell.edu
         QAContact: xorg-team at lists.x.org


A bit odd:

$ grep -E 'DPI|dimensions' /var/log/Xorg.0.log
(**) NOUVEAU(0): Display dimensions: (290, 180) mm
(**) NOUVEAU(0): DPI set to (112, 112)

290mm x 180mm and 112x112 DPI are indeed correct (1280x800, 13.3"
widescreen),
however:

$ xdpyinfo | grep -E 'dimensions|resolution'
  dimensions:    1280x800 pixels (338x211 millimeters)
  resolution:    96x96 dots per inch

X appears to be getting bogus data, which screws up font sizing.

I'm on a MacBook Pro 13" with GeForce 9400M (NVac).  Using nouveau-drm
from the
kernel tree with git rev eeec3a1ecd703d3a32fe223274d2a77686030d78 (built out of
tree for kernel 2.6.32-gentoo-r2), and xf86-video-nouveau git rev
2630a1553d560ce2c7391bc103d4a543f7d3d0da.

If there's any more data or info I can provide, please let me know.


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Julien Cristau <jcristau at debian.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE




--- Comment #1 from Julien Cristau <jcristau at debian.org>  2010-01-24
06:37:29 PST ---


*** This bug has been marked as a duplicate of bug 23705 ***


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--- Comment #2 from Brian Tarricone <bjt23 at cornell.edu>  2010-01-24
14:56:51 PST ---
(In reply to comment #1)
> 
> *** This bug has been marked as a duplicate of bug 23705 ***
Are you sure this is a dupe?  That bug seems to refer to a general problem with
xorg-server 1.7.  When I use 'nvidia' instead of 'nouveau', my
DPI is reported
correctly.  So it sounds like this is something that the video driver does
indeed have control over.

(If it's not *appropriate* for the video driver to 'unbreak' this,
then of
course I understand.)


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