[SOLVED]HD Screen very high resolution dimension - small [BUG]

I got a new laptop and of course the first thing I must put on it it's Arch Linux.
It's an Asus N551 and EXTREAMLY WEIRD but everything went fine, I mean everything worked without me doing anything to fix up stuff (yes I had to install bumblebee) but everything, sound, touchpad, graphics, networking, etc just required installing the driver and that's it.
Now the problem is with the display,
xdpyinfo | grep -B2 resolution
screen #0:
dimensions: 1920x1080 pixels (508x285 millimeters)
resolution: 96x96 dots per inch
The resolution is as you see but everything else it's really small and I think I will become blind if I don't fix this.
I'm currently using the intel graphic card.
I read 2-3 topics similar to mine but without any understandble resolution and beeing very old I thought it's better to open a new one.
Thanks.
SOLUTION:
1) Find out your Screen ID (It should show "connected" and "allot of available displays")
]$ xrandr
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 345mm x 194mm
1920x1080 60.02*+
1400x1050 59.98
1280x1024 60.02
1280x960 60.00
1024x768 60.00
800x600 60.32 56.25
640x480 59.94
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
So Mine is eDP1
2) Find your screen size in mm
In my case intel and xdpyinfo reported the wrong value, so the right one for me was 345x194 mm
3) Find out your right DPI settings
http://dpi.lv will do this for you.
4) Apply what you found:
cat /etc/X11/xorg.conf.d/90-monitor.conf
Section "Monitor"
Identifier "eDP1"
DisplaySize 345 194
Option "DPI" "141 x 141"
EndSection
stop your DE and startx again
Confirm the settings were applied:
$ xdpyinfo | grep -B1 dot
dimensions: 1920x1080 pixels (345x194 millimeters)
resolution: 141x141 dots per inch
5) Use a DE which will not overwrite your DPI settings (So far , Gnome, Cinnamon, does it).
LXDE won't
xfce4 gives you an option to set your desired DPI so it's also OK.
6) Configure the browsers / or heavy applications NOT to ignore the system DPI settings.
(this is also a looong trail to deal with)....
BUG: https://bugs.freedesktop.org/show_bug.cgi?id=89820
Last edited by r0b0t (2015-03-30 11:25:42)

1- Done
$ cat /etc/X11/xorg.conf.d/90-monitor.conf
Section "Monitor"
Identifier "eDP1"
DisplaySize 345 194
Option "DPI" "141 x 141"
EndSection
And confirmed by xdpyinfo
2)LXDE it is
xfce4 also work if I manually set the dpi to 141 (it supports it).
It's working now.
Will try configure "dpi-resistent" applications.
I will mark the thread as solved but should I open a bug for intel setting
1) Wrong dimension
2) Wrong DPI
This is what's happening: (vanilla configuration , no xorg.conf stuff, no xinitrc)
[ 818.088] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20141121
[ 818.089] (WW) Falling back to old probe method for modesetting
[ 818.089] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card support
[ 818.089] (--) intel(0): Integrated Graphics Chipset: Intel(R) HD Graphics 4600
------------------------ SETTING DPI WRONGLY---------------------------------------------
[ 818.089] (--) intel(0): Output eDP1 using initial mode 1920x1080 on pipe 0
[ 818.089] (==) intel(0): TearFree disabled
[ 818.089] (==) intel(0): DPI set to (96, 96)
[ 818.090] (II) intel(0): SNA initialized with Haswell (gen7.5, gt2) backend
[ 818.090] (==) intel(0): Backing store enabled
[ 818.090] (==) intel(0): Silken mouse enabled
[ 818.090] (II) intel(0): HW Cursor enabled
[ 818.090] (II) intel(0): RandR 1.2 enabled, ignore the following RandR disabled message. >>>>>>>>>> WHY SHOULD I IGNORE??<<<<<<<<
[ 818.090] (==) intel(0): DPMS enabled
[ 818.090] (==) intel(0): display hotplug detection enabled
[ 818.090] (II) intel(0): [DRI2] Setup complete
[ 818.090] (II) intel(0): [DRI2] DRI driver: i965
[ 818.090] (II) intel(0): [DRI2] VDPAU driver: i965
[ 818.090] (II) intel(0): direct rendering: DRI2 enabled
[ 818.090] (II) intel(0): hardware support for Present enabled
[ 818.090] (--) RandR disabled
[ 818.107] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer
[ 818.107] (II) AIGLX: enabled GLX_ARB_create_context
[ 818.107] (II) AIGLX: enabled GLX_ARB_create_context_profile
[ 818.107] (II) AIGLX: enabled GLX_EXT_create_context_es2_profile
[ 818.107] (II) AIGLX: enabled GLX_INTEL_swap_event
[ 818.107] (II) AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control
[ 818.107] (II) AIGLX: enabled GLX_EXT_framebuffer_sRGB
[ 818.107] (II) AIGLX: enabled GLX_ARB_fbconfig_float
[ 818.107] (II) AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects
[ 818.107] (II) AIGLX: enabled GLX_ARB_create_context_robustness
[ 818.107] (II) AIGLX: Loaded and initialized i965
[ 818.107] (II) GLX: Initialized DRI2 GL provider for screen 0
[ 818.109] (II) intel(0): switch to mode [email protected] on eDP1 using pipe 0, position (0, 0), rotation normal, reflection none
[ 818.122] (II) intel(0): Setting screen physical size to 508 x 285 >>>>>>>>>>>>>>>>> WRONG IT'S 345x194mm<<<<<<<<<<<<<<<<<<<<

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[SOLVED]HD Screen very high resolution dimension - small [BUG]

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