[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 #2 from Martin Steigerwald <Martin at Lichtvoll.de> ---
Okay, so the SNA driver basically ignores XRandR display size measurements as
shown with xrandr comment (see previous comment) as well as setting the DPI for
each display separately:

martin at 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

But I found a way to force it to use my higher 143x143 (instead of the 96x96
standard DPI setting that makes me want to use a magnifier glass): KDE
Systemsettings, font setting, force DPI, enter value, be done with it.

This seems to work for KDE and GNOME applications. Chromium 43 has high DPI
support on its own. With Firefox GUI it works, with webpage display I still use
a addon that remembers zoom settings for page. I am using 150% on this bug
reporting page for example.

In anyway, I do think the current DPI behavior of Intel SNA driver on ThinkPad
T520 with 15 inch Full HD display is crap. Please let it use Xrandr display
measurement and/or at least restore respecting manually setting display size.

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