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

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Felix Miata composed on 2021-07-08 17:08 (UTC-0400):

> Pierre Couderc composed on 2021-07-08 22:42 (UTC+0200):

>> I have a problem when trying a 4K display with Acer swift5. They say 
>> that 3840x2160 30hz is supported...

>> When I try (under bullseye) :

>> gtf  3840 2160 30

>> xrandr --newmode  "3840x2160_30.00"  339.57  3840 4080 4496 5152 2160 
>> 2161 2164 2197  -HSync +Vsync
>> xrandr --addmode HDMI-1   3840x2160_30.00
>> xrandr --output HDMI-1 --mode "3840x2160_30.00"

>> the PC crashes (all is black, need to power off).
 											
> You should have no need of gtf or mode creation with 620 graphics. Mode creation
> via xrandr is an anachronism. X knows very well how to auto generate modes when
> provided with needed specs. If EDID, the usual source for the data, is broken,
> then provide the specs via:

> 	/etc/X11/xorg.conf.d/50-monitor.conf

> containing the horizontal sync and vertical refresh rates for your display, e.g.:
> 
> 	Section "Monitor"
> 	    Identifier	"Default Monitor"
> 		HorizSync	28-85
> 		VertRefresh	50-100
		Option	"PreferredMode"	"3840x2160"
> 	EndSection
> 
> Usually you can get these two specs if not elsewhere using:
> 
> 	hwinfo --monitor
> 
> As to why you're having the problem, let us see the resulting URL from:
> 
> 	pastebinit /var/log/Xorg.0.log
> 
> as a start.-- 
Evolution as taught in public schools is, like religion,
	based on faith, not based on science.

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata

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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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