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

[Pierre Couderc <pierre@couderc.eu>]

On 7/8/21 11:34 PM, Felix Miata wrote:
> > > 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:

Yes, EDID is wrong and does not show 3840x2160 warranted by Samsung for UR59C 32".
 

> > 	/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
This has no effect but I suppose the problem is due to the 2 screen 
configuration. So I have tried replacing Identifier with :

 Identifier    "HDMI-1"

But it is not better...

I have put in https://paste.debian.net/1203873/
the content of  .local/share/xorg/Xorg.0.log

It seems that the Modeline 3840x2160 is recognized, but the 30hz 
limitation is not expressed.

Acer swift5 specifies 3840x2160 but with a 30hz limitation, no more 
frequency.

Thanks you very much

PC