Creating and envoking increased monitor resolution failing:

Hi, I am having some difficulty increasing the resolution on a monitor attached to my computer. openSUSE Tmbleweed with the secondary monitor model type is: NEC MultiSync EA294WMI. Examining a datasheet for the monitor claims optimum resolution is 2560X1080 at 60Hz.

I am receiving an error when attempting to envoke the increased resolution:

:~> cvt 2560 1080 60
# 2560x1080 59.98 Hz (CVT) hsync: 67.17 kHz; pclk: 230.00 MHz
Modeline "2560x1080_60.00"  230.00  2560 2720 2992 3424  1080 1083 1093 1120 -hsync +vsync

:~> xrandr --newmode "NEC_2560x1080" 230.00 2560 2720 2992 3424 1080 1083 1093 1120 -hsync +vsync

:~> xrandr --addmode DP-1 NEC_2560x1080

:~> xrandr --output DP-1 --mode NEC_2560x1080 
xrandr: Configure crtc 1 failed

So this error^ .

Video card information:

# /sbin/lspci -nnk | grep -EA3 "VGA|Display|3D"
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Lexa [Radeon 540X/550X/630 / RX 640 / E9171 MCM] [1002:6987] (rev c1)
        Subsystem: Dell Device [1028:1713]
        Kernel driver in use: amdgpu
        Kernel modules: amdgpu

Video card specifications TECHPOWERUP website :< Dell RX 550 OEM 4 GB Specs | TechPowerUp GPU Database
Monitor datasheet :< Datasheet for NEC MultiSync® EA294WMi - Sharp NEC Display Solutions

How can setting the monitor resolution of 2560x1080 be achieved in this scenerio?

Please show us the results of
xrandr --verbose
You may neet to specify the crtc number explicitly, when setting the desired display mode.

Hi, I discovered that I have had the video card side (mini DisplayPort) end of the cable to DVI-D end side of cable attached to the 18 pin DVI-D not the 24 pin DVI-D input of monitor. Changing this now gives ability to see 2560x1080 resolution displayed. This is a great visual display improvement.

Nevertheless I attached the xrandr --verbose output :< openSUSE Paste

Thanks :grinning:

All good. Thanks for the update.