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Re: Failure to use 3840x2160 30hz with Intel 620 chipset

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On 7/10/21 2:17 AM, Felix Miata wrote:

> Pierre Couderc composed on 2021-07-09 09:05 (UTC+0200):  > > >> Yes, EDID is wrong and does not show 3840x2160 warranted by 
Samsung >> for UR59C 32". > > > > With dual displays, setup is more 
complicated, instead of > /etc/X11/xorg.conf.d/50-monitor.conf try 
/etc/X11/xorg.conf with the > following content: > > Section "Device" 
Identifier "UHD620" Driver "modesetting" Option > "monitor-eDP-1" 
"eDPcon" Option "monitor-HDMI-1" "HDMIcon" > EndSection > > Section 
"Monitor" Identifier "HDMIcon" HorizSync 30-135 VertRefresh > 29-31 
Option "PreferredMode" "3840x2160" EndSection > > Section "Monitor" 
Identifier "eDPcon"Section "Monitor" Identifier > "HDMIcon" HorizSync 
30-135 VertRefresh 29-31 ModeLine > "3840x2160_30.00" 339.57 3840 4080 
4496 5152 2160 2161 2164 2197 > -HSync +Vsync Option "PreferredMode" 
"3840x2160_30.00" EndSection > > Section "Monitor" > > Option "Primary" 
"true" EndSection > > Section "Screen" Identifier "extScreen" Device 
"UHD620" Monitor > "HDMIcon" EndSection > > Section "Screen" Identifier 
"intScreen" Device "UHD620" Monitor > "eDPcon" EndSection > > Also, make 
sure your HDMI cable is up to specs for 4K.

The HDMI cable was provided with the Samsung display.

I have tried your solution which starts the 2 displays in  1920x1080

see : https://paste.debian.net/1203999/

for( .local/share/xorg/Xorg.0.log)


Then I have tried  with : (please remind that the 4K display is 
specified 30hz for 3840x2160).

Section "Monitor"
     Identifier  "HDMIcon"
         HorizSync       30-135
         VertRefresh     29-31
         ModeLine "3840x2160_30.00"  339.57  3840 4080 4496 5152 2160 
2161 2164 2197  -HSync +Vsync
         Option  "PreferredMode" "3840x2160_30.00"
EndSection

The result is  : https://paste.debian.net/1204000

It does not strictly crashes but only the first monitor is displayed in 
X mode, the second monitor (HDMI) remains as in non X mode, and the 
mouse does not want to quit the high left corner of the HDMI monitor.

I feel as if  there is some driver problem...

Than you very much, Felix, I progress !

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Thread

Failure to use 3840x2160 30hz with Intel 620 chipset Pierre Couderc <pierre@couderc.eu> - 2021-07-08 23:00 +0200
  Re: Failure to use 3840x2160 30hz with Intel 620 chipset Felix Miata <mrmazda@earthlink.net> - 2021-07-08 23:10 +0200
    Re: Failure to use 3840x2160 30hz with Intel 620 chipset Felix Miata <mrmazda@earthlink.net> - 2021-07-08 23:40 +0200
      Re: Failure to use 3840x2160 30hz with Intel 620 chipset Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-09 00:40 +0200
      Re: Failure to use 3840x2160 30hz with Intel 620 chipset Pierre Couderc <pierre@couderc.eu> - 2021-07-09 09:10 +0200
        Re: Failure to use 3840x2160 30hz with Intel 620 chipset Felix Miata <mrmazda@earthlink.net> - 2021-07-10 02:20 +0200
          Re: Failure to use 3840x2160 30hz with Intel 620 chipset Pierre Couderc <pierre@couderc.eu> - 2021-07-10 23:10 +0200
            Re: Failure to use 3840x2160 30hz with Intel 620 chipset Felix Miata <mrmazda@earthlink.net> - 2021-07-11 00:40 +0200
              Re: Failure to use 3840x2160 30hz with Intel 620 chipset Pierre Couderc <pierre@couderc.eu> - 2021-07-12 07:30 +0200
              Re: Failure to use 3840x2160 30hz with Intel 620 chipset Felix Miata <mrmazda@earthlink.net> - 2021-07-12 10:20 +0200
                Re: Failure to use 3840x2160 30hz with Intel 620 chipset Pierre Couderc <pierre@couderc.eu> - 2021-07-16 08:40 +0200
                Re: Failure to use 3840x2160 30hz with Intel 620 chipset Pierre Couderc <pierre@couderc.eu> - 2021-07-16 08:40 +0200
                Re: Failure to use 3840x2160 30hz with Intel 620 chipset Felix Miata <mrmazda@earthlink.net> - 2021-07-16 10:00 +0200
                Re: Failure to use 3840x2160 30hz with Intel 620 chipset Pierre Couderc <pierre@couderc.eu> - 2021-07-16 12:10 +0200
              Re: Failure to use 3840x2160 30hz with Intel 620 chipset Pierre Couderc <pierre@couderc.eu> - 2021-07-17 08:20 +0200

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