Cant get 3480 x 2160 resolution (solved)

Hi there.

I have 4K screen and NVidia T400 so its not up to hardware. But i cant get higher resolution than 1920x1080.

ekbass@ekbass-ubuntu:~$ nvidia-smi
Fri Mar 8 13:52:13 2024
+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 550.54.14 Driver Version: 550.54.14 CUDA Version: 12.4 |
|-----------------------------------------+------------------------+----------------------+
| GPU Name Persistence-M | Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap | Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|=========================================+========================+======================|
| 0 NVIDIA T400 4GB Off | 00000000:01:00.0 On | N/A |
| 38% 42C P0 N/A / 31W | 444MiB / 4096MiB | 1% Default |
| | | N/A |
+-----------------------------------------+------------------------+----------------------+

+-----------------------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=========================================================================================|
| 0 N/A N/A 1690 G /usr/lib/xorg/Xorg 126MiB |
| 0 N/A N/A 1883 G /usr/bin/gnome-shell 185MiB |
| 0 N/A N/A 3836 G ...seed-version=20240307-180129.405000 96MiB |
+-----------------------------------------------------------------------------------------+

ekbass@ekbass-ubuntu:~$ xrandr
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
DP-5 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 1872mm x 1053mm
1920x1080 60.00*+ 59.94 50.00 29.97 25.00 23.98
1280x1024 60.02
1280x960 60.00
1280x720 60.00 59.94 50.00
1024x768 60.00
800x600 60.32
720x576 50.00
720x480 59.94
640x480 59.94 59.93
3840x2160_30.00 (0x280) 297.000MHz +HSync -VSync
h: width 3840 start 4016 end 4104 total 4400 skew 0 clock 67.50KHz
v: height 2160 start 2168 end 2178 total 2250 clock 30.00Hz
1920x1200_60.00 (0x2e4) 193.250MHz -HSync +VSync
h: width 1920 start 2056 end 2256 total 2592 skew 0 clock 74.56KHz
v: height 1200 start 1203 end 1209 total 1245 clock 59.88Hz
3840x2160_60.00 (0x2e9) 712.750MHz -HSync +VSync
h: width 3840 start 4160 end 4576 total 5312 skew 0 clock 134.18KHz
v: height 2160 start 2163 end 2168 total 2237 clock 59.98Hz

ekbass@ekbass-ubuntu:~$ sudo xrandr --addmode DP-5 "3480x2160_60.00"
xrandr: cannot find mode "3480x2160_60.00"

Few modes are something i have created by several hints from web, not something NVidia has done lol.

3840x2160_30.00 (0x280) 297.000MHz +HSync -VSync
h: width 3840 start 4016 end 4104 total 4400 skew 0 clock 67.50KHz
v: height 2160 start 2168 end 2178 total 2250 clock 30.00Hz
1920x1200_60.00 (0x2e4) 193.250MHz -HSync +VSync
h: width 1920 start 2056 end 2256 total 2592 skew 0 clock 74.56KHz
v: height 1200 start 1203 end 1209 total 1245 clock 59.88Hz
3840x2160_60.00 (0x2e9) 712.750MHz -HSync +VSync
h: width 3840 start 4160 end 4576 total 5312 skew 0 clock 134.18KHz
v: height 2160 start 2163 end 2168 total 2237 clock 59.98Hz

Any ideas, how to move on with this?

Never mind. My adapter is HDMI only, not 4K so i need to go via shop to solve this.

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