[ 200.519] (WW) NVIDIA(G0): cannot compute DPI from Samsung LC49G95T (DFP-1)'s EDID

Graphics / Linux Linux
1

Pulling the EDID from this display shows these values:
Horizontal Display Size: 1193
Vertical Display Size: 336

I think the driver should be able to use these to calculate the DPI correctly?

see also
EDID issue which blamed the EDID info

If it’s a monitor issue it would be nice to have extra evidence because Samsung support is Phone/Chat only T_T

2

Attaching one file at a time because ‘new users can only put one link in a post’ and ‘Please wait 2 minutes to reply’…
xorg.log (3.2 KB)

EDID: (because attaching files is too painful)
$ cat ~/Documents/edid.txt
00 ff ff ff ff ff ff 00 4c 2d 53 70 4d 38 58 43 ff ff 01 04 b5 77 22 78 3b c7 25 b1 4b 46 a8 26 0e 50 54 bf ef 80 71 4f 81 00 81 c0 81 80 a9 c0 b3 00 95 00 d1 c0 74 d6 00 a0 f0 38 40 40 30 20 3a 00 a9 50 41 00 00 1a 00 00 00 fd 00 3c 78 b7 b7 61 01 0a 20 20 20 20 20 20 00 00 00 fc 00 4c 43 34 39 47 39 35 54 0a 20 20 20 20 00 00 00 ff 00 48 34 5a 52 36 30 32 38 31 30 0a 20 20 02 1b 02 03 2d f0 44 10 5a 3f 5c 23 09 07 07 83 01 00 00 e3 05 c0 00 6d 1a 00 00 02 0f 3c 78 00 04 8b 12 73 17 e3 06 05 01 e5 01 8b 84 90 01 56 5e 00 a0 a0 a0 29 50 30 20 35 00 a9 50 41 00 00 1a 58 4d 00 b8 a1 38 14 40 f8 2c 45 00 a9 50 41 00 00 1e 1a 68 00 a0 f0 38 1f 40 30 20 3a 00 a9 50 41 00 00 1a 6f c2 00 a0 a0 a0 55 50 30 20 35 00 a9 50 41 00 00 1a 00 00 00 00 00 00 00 00 00 00 fc 70 12 79 00 00 03 01 28 2f 79 01 88 ff 13 9f 00 2f 80 1f 00 9f 05 53 00 02 00 09 00 33 b7 00 08 ff 13 9f 00 2f 80 1f 00 9f 05 28 00 02 00 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 4f 90

3

The lack of width/height in mm in XRandR is causing this issue:

4

You may have better luck getting help from the Geforce users on the consumer forums:
https://www.nvidia.com/en-us/geforce/forums/discover/

I expect someone must have the same monitor as you and can share notes - the EDID communication and interpretation between Linux and Windows is likely to be the same.

5

This issue doesn’t occur in windows as there is no xrandr to report invalid data to the game engine… I get an (incorrect) value of 96 dpi from the GetDpiForMonitor api in windows… it’s not correct but at least it gives a sane value instead of ‘1mm’ for the display size.

$ xrandr | grep " connected"
eDP-1 connected (normal left inverted right x axis y axis)
DP-1-0 connected primary 5120x1440+0+0 (normal left inverted right x axis y axis) 1mm x 1mm