I just tried to extract EDID file data with read-edid util; The thing is the output shows :
$sudo get-edid | decode-edid ... Manufacturer: AUO Model 20ec Serial Number 0 Made week 0 of 2013 EDID version: 1.4 Digital display 6 bits per primary color channel Digital interface is not defined Maximum image size: 34 cm x 19 cm Gamma: 2.20 Supported color formats: RGB 4:4:4 First detailed timing is preferred timing Established timings supported: Standard timings supported: Detailed mode: Clock 77.000 MHz, 344 mm x 193 mm 1366 1382 1398 1628 hborder 0 768 771 785 788 vborder 0 -hsync -vsync Manufacturer-specified data, tag 15 ASCII string: AUO ASCII string: *** ...
I checked the xrandr and it outputs :
$xrandr Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192 eDP1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 193mm 1366x768 60.02*+ 1024x768 60.00 800x600 60.32 56.25 640x480 59.94 ...
And it shows I have 60.02 refresh rate or similar which is not correct?...
As a test, according to the EDID I created /etc/X11/xorg.conf.d/90-monitor.conf file with content as :
Section "Monitor" Identifier "<default monitor>" DisplaySize 344 193 EndSection
...as you can see, the xrandr outputs as enabled the 344x193 display size but still I am not sure is the 344x193 are correct values? Should it be 344x193 or 340x190 according to "Maximum image size: 34 cm x 19 cm" values?
Moreover, the EDID shows my notebook has 77.000MHz refresh rate (supposed to be) but the xrandr outputs (see above) I have 60.000MHz, as I can get it; So that makes me confused which values really should be used for xorg? And should I have (in linux .config) PWM as y or m if I need un-standard refresh rate be running?
So my question is... how to use proper DPI and refresh values from EDID to set them into /etc/X11/xorg.conf.d/90-monitor.conf file and have them valid?
- kernel 3.16.7
- os Linux Arch x64
- video card : Intel HD Graphics (Sandy Bridge - Bay Trail)