[Bug 89820] New: [8086] x86_64 Drivers detects wrong resolution and DPI

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89820

            Bug ID: 89820
           Summary: [8086] x86_64 Drivers detects wrong resolution and DPI
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: igpg at openmailbox.org
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114706
  --> https://bugs.freedesktop.org/attachment.cgi?id=114706&action=edit
xorg log file

INFO:
3.19.2-1-ARCH #1 SMP PREEMPT Wed Mar 18 16:21:02 CET 2015 x86_64 GNU/Linux
xf86-video-intel 2.99.917-4
mesa 10.5.2-1
xorg-server 1.17.1-4
libdrm 2.4.60-2

Basically on a vanilla configuration (I just got the laptop so no xorg.conf or
anything in xinit) the driver fails to detect the resolution and (as a result I
guess) it fails also to calculate the DPI and set's it to 96.

1) [   818.122] (II) intel(0): Setting screen physical size to 508 x 285

It's wrong, my screen is a full HD 15.6" 345x194mm

2) [   818.089] (==) intel(0): DPI set to (96, 96)

Which is confirmed by xdpyinfo:
 xdpyinfo | grep -B2 resolution
screen #0:
  dimensions:    1920x1080 pixels (508x285 millimeters)
  resolution:    96x96 dots per inch

However xrandr shows eDP1 connected primary 1920x1080+0+0 (normal left inverted
right x axis y axis) 345mm x 194mm

Maybe becuase was disabled and enabled during startx? I don't know.

This cause most of the DE's display everything in miniature and basically the
laptop is unusable (otherwise you go blind).

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