[Bug 90842] sna driver ignores DisplaySize setting in xorg.conf

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90842

--- Comment #4 from Martin Steigerwald <Martin at Lichtvoll.de> ---
Created attachment 116284
  --> https://bugs.freedesktop.org/attachment.cgi?id=116284&action=edit
xorg log with sna with two different displaysize settings for each display

So with:

merkaba:~> cat /etc/X11/xorg.conf.d/anzeige.conf 
Section "Device"
        Identifier      "Grafikkern"

        Driver          "intel"

        # Monitore
        Option          "Monitor-LVDS1" "Notebook"
        Option          "Monitor-DP2"   "Extern"

        # Optionen
        #Option         "AccelMethod"   "uxa"
EndSection

Section "Monitor"
        Identifier      "Notebook"

        DisplaySize     344 193
EndSection

Section "Monitor"
        Identifier      "Extern"

        DisplaySize     531 299
EndSection

I still get:

[  1594.522] (II) intel(0): switch to mode 1920x1080 at 60.0 on LVDS1 using pipe
0, position (0, 0), rotation normal, reflection none
[  1594.531] (II) intel(0): switch to mode 1920x1080 at 60.0 on DP2 using pipe 1,
position (0, 0), rotation normal, reflection none
[  1594.540] (II) intel(0): Setting screen physical size to 508 x 285

So it doesn´t use any of the given display sizes and it appears to use *one*
screensize for both displays. Is this an Xorg limitation? xdpyinfo also only
reports one dots per inch value. But even with the physical screen size it
uses, dpi are still set to 96x96, which according to the resolution of the
display just does not match reality.

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