Which Xorg log goes with the terminal in question? Even if it is at the wrong resolution you should be able to run this command and see it is “`:0`

” or “`:1`

”:

`echo $DISPLAY`

For the “`:0`

” log, I see this:

```
[ 12.934] (II) NVIDIA(GPU-0): Validating Mode "3840x2160_60":
[ 12.935] (II) NVIDIA(GPU-0): Mode Sources: EDID, Detailed
[ 12.935] (II) NVIDIA(GPU-0): 3840 x 2160 @ 60 Hz
[ 12.935] (II) NVIDIA(GPU-0): Pixel Clock : 533.33 MHz
[ 12.935] (II) NVIDIA(GPU-0): HRes, HSyncStart : 3840, 3888
[ 12.935] (II) NVIDIA(GPU-0): HSyncEnd, HTotal : 3920, 4000
[ 12.935] (II) NVIDIA(GPU-0): VRes, VSyncStart : 2160, 2163
[ 12.935] (II) NVIDIA(GPU-0): VSyncEnd, VTotal : 2168, 2222
[ 12.935] (II) NVIDIA(GPU-0): H/V Polarity : +/-
[ 12.935] (II) NVIDIA(GPU-0): Mode "3840x2160_60" is valid.
```

So that mode is valid and should work. If you specified something seeming to be the same mode, but if it somehow used different timings, it might still exceed timing capabilities of hardware.

For “`:1`

” it should be the same:

```
[ 28.226] (II) NVIDIA(GPU-0): --- Building ModePool for Samsung U28E590 (DFP-1) ---
[ 28.226] (II) NVIDIA(GPU-0): Validating Mode "3840x2160_60":
[ 28.226] (II) NVIDIA(GPU-0): Mode Sources: EDID, Detailed
[ 28.226] (II) NVIDIA(GPU-0): 3840 x 2160 @ 60 Hz
[ 28.226] (II) NVIDIA(GPU-0): Pixel Clock : 533.33 MHz
[ 28.226] (II) NVIDIA(GPU-0): HRes, HSyncStart : 3840, 3888
[ 28.226] (II) NVIDIA(GPU-0): HSyncEnd, HTotal : 3920, 4000
[ 28.226] (II) NVIDIA(GPU-0): VRes, VSyncStart : 2160, 2163
[ 28.226] (II) NVIDIA(GPU-0): VSyncEnd, VTotal : 2168, 2222
[ 28.226] (II) NVIDIA(GPU-0): H/V Polarity : +/-
[ 28.226] (II) NVIDIA(GPU-0): Mode "3840x2160_60" is valid.
```

The brief list can be found in each log as “ModePool”. An example from one of your logs:

```
[ 13.320] (II) NVIDIA(GPU-0): --- Modes in ModePool for Samsung U28E590 (DFP-1) ---
[ 13.320] (II) NVIDIA(GPU-0): "nvidia-auto-select" : 3840 x 2160 @ 60.0 Hz (from: EDID, Detailed)
[ 13.320] (II) NVIDIA(GPU-0): "3840x2160" : 3840 x 2160 @ 60.0 Hz (from: EDID, Detailed)
[ 13.320] (II) NVIDIA(GPU-0): "3840x2160_60" : 3840 x 2160 @ 60.0 Hz (from: EDID, Detailed)
[ 13.320] (II) NVIDIA(GPU-0): "3840x2160_30" : 3840 x 2160 @ 30.0 Hz (from: EDID, CEA, Detailed)
[ 13.320] (II) NVIDIA(GPU-0): "2560x1440" : 2560 x 1440 @ 60.0 Hz (from: EDID, Detailed)
[ 13.320] (II) NVIDIA(GPU-0): "2560x1440_60" : 2560 x 1440 @ 60.0 Hz (from: EDID, Detailed)
[ 13.320] (II) NVIDIA(GPU-0): "1920x1080" : 1920 x 1080 @ 60.0 Hz (from: EDID, CEA, Detailed)
[ 13.320] (II) NVIDIA(GPU-0): "1920x1080_60" : 1920 x 1080 @ 60.0 Hz (from: EDID, CEA, Detailed)
[ 13.320] (II) NVIDIA(GPU-0): "1920x1080_60_0" : 1920 x 1080 @ 60.0 Hz (from: EDID, CEA)
[ 13.320] (II) NVIDIA(GPU-0): "1920x1080_60_1" : 1920 x 1080 @ 59.9 Hz (from: EDID, CEA)
[ 13.320] (II) NVIDIA(GPU-0): "1680x1050" : 1680 x 1050 @ 60.0 Hz (from: EDID)
[ 13.320] (II) NVIDIA(GPU-0): "1680x1050_60" : 1680 x 1050 @ 60.0 Hz (from: EDID)
[ 13.320] (II) NVIDIA(GPU-0): "1600x900" : 1600 x 900 @ 60.0 Hz (from: EDID)
[ 13.320] (II) NVIDIA(GPU-0): "1600x900_60" : 1600 x 900 @ 60.0 Hz (from: EDID)
[ 13.320] (II) NVIDIA(GPU-0): "1440x900" : 1440 x 900 @ 59.9 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1440x900_60" : 1440 x 900 @ 59.9 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1280x1024" : 1280 x 1024 @ 75.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1280x1024_75" : 1280 x 1024 @ 75.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1280x1024_60" : 1280 x 1024 @ 60.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1280x800" : 1280 x 800 @ 59.8 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1280x800_60" : 1280 x 800 @ 59.8 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1280x720" : 1280 x 720 @ 60.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1280x720_60" : 1280 x 720 @ 60.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1152x864" : 1152 x 864 @ 75.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1152x864_75" : 1152 x 864 @ 75.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1024x768" : 1024 x 768 @ 75.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1024x768_75" : 1024 x 768 @ 75.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1024x768_70" : 1024 x 768 @ 70.1 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "1024x768_60" : 1024 x 768 @ 60.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "832x624" : 832 x 624 @ 75.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "832x624_75" : 832 x 624 @ 75.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "800x600" : 800 x 600 @ 75.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "800x600_75" : 800 x 600 @ 75.0 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "800x600_72" : 800 x 600 @ 72.2 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "800x600_60" : 800 x 600 @ 60.3 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "800x600_56" : 800 x 600 @ 56.3 Hz (from: EDID)
[ 13.321] (II) NVIDIA(GPU-0): "720x400" : 720 x 400 @ 70.0 Hz (from: EDID)
[ 13.322] (II) NVIDIA(GPU-0): "720x400_70" : 720 x 400 @ 70.0 Hz (from: EDID)
[ 13.322] (II) NVIDIA(GPU-0): "640x480" : 640 x 480 @ 75.0 Hz (from: EDID)
[ 13.322] (II) NVIDIA(GPU-0): "640x480_75" : 640 x 480 @ 75.0 Hz (from: EDID)
[ 13.322] (II) NVIDIA(GPU-0): "640x480_73" : 640 x 480 @ 72.8 Hz (from: EDID)
[ 13.322] (II) NVIDIA(GPU-0): "640x480_67" : 640 x 480 @ 67.1 Hz (from: EDID)
[ 13.322] (II) NVIDIA(GPU-0): "640x480_60" : 640 x 480 @ 59.9 Hz (from: EDID)
[ 13.322] (II) NVIDIA(GPU-0): --- End of ModePool for Samsung U28E590 (DFP-1): ---
```