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#1 2022-04-14 21:08:28

krolikowskiK
Member
Registered: 2022-04-14
Posts: 1

Unable to set native resolution using DP

Hi,
Firstly, I've managed to set native resolution using HDMI, but I consider it workaround only. It took only switching cables and worked instantly.
I have to note that this problem concerns only one of the monitors, so maybe it has faulty DP or something.

Hardware set:

  • Intel Core i3-12100

  • MSI PRO B660M-A WIFI DDR4

  • Two AOC Q24P2Q

I've tried adding new resolution using xrandr:

$ xrandr
Screen 0: minimum 16 x 16, current 3584 x 1440, maximum 32767 x 32767
XWAYLAND0 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 530mm x 300mm
   2560x1440     59.91*+
   1920x1440     59.90  
   1600x1200     59.87  
   1440x1080     59.87  
   1400x1050     59.86  
   1280x1024     59.76  
   1280x960      59.94  
   1152x864      59.78  
   1024x768      59.68  
   800x600       59.86  
   640x480       59.38  
   320x240       59.52  
   1920x1200     59.88  
   1680x1050     59.85  
   1440x900      59.89  
   1280x800      59.81  
   720x480       59.71  
   640x400       59.20  
   320x200       58.96  
   2048x1152     59.90  
   1920x1080     59.88  
   1600x900      59.82  
   1368x768      59.88  
   1280x720      59.86  
   1024x576      59.90  
   864x486       59.45  
   720x400       59.55  
   640x350       59.77  
XWAYLAND5 connected 1024x768+2560+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768      59.92*+
   800x600       59.86  
   640x480       59.38  
   320x240       59.52  
   720x480       59.71  
   640x400       59.95  
   320x200       58.96  
   1024x576      59.90  
   864x486       59.92  
   720x400       59.55  
   640x350       59.77

$ cvt 2560 1440 75
# 2560x1440 74.94 Hz (CVT 3.69M9) hsync: 112.86 kHz; pclk: 397.25 MHz
Modeline "2560x1440_75.00"  397.25  2560 2760 3040 3520  1440 1443 1448 1506 -hsync +vsync

$ xrandr --newmode "2560x1440_75.00"  397.25  2560 2760 3040 3520  1440 1443 1448 1506 -hsync +vsync
$ xrandr --addmode XWAYLAND5 2560x1440_75.00
$ xrandr --output XWAYLAND5 --mode 2560x1440_75.00
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  21 (RRSetCrtcConfig)
  Value in failed request:  0xa00
  Serial number of failed request:  29
  Current serial number in output stream:  29

I also have this set in /etc/mkinitcpio.conf

MODULES=(intel_agp i915)

and use xf86-video-intel and GNOME.

get-edid result:

This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
Looks like no busses have an EDID. Sorry!
Attempting to use the classical VBE interface

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
	Function unsupported
	Call failed

	VBE version 0
	VBE string at 0x0 "O"

VBE/DDC service about to be called
	Report DDC capabilities

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f15 bx=0x0 cx=0x0
	Function unsupported
	Call failed

Reading next EDID block

VBE/DDC service about to be called
	Read EDID

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
	Function unsupported
	Call failed

The EDID data should not be trusted as the VBE call failed
Error: output block unchanged

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#2 2022-04-14 21:34:18

seth
Member
Registered: 2012-09-03
Posts: 29,924

Re: Unable to set native resolution using DP

and use xf86-video-intel and GNOME

No, because you're running a wayland session - there're xrandr reports the XWAYLAND0 and XWAYLAND5 dummies and you're not gonna be able to alter the resolution this way, but will have to use the gnome settings.

You could try gnome on xorg on whether this principally works and eg. sway to see whether it's limited to the gnome wayland compositor.

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