1

So I have a laptop with display of 2560x1440 resolution and 240Hz refresh rate. From my understanding, OS detects supported & preferred resolutions from EDID information.

I've used dumpEDID tool to dump my EDID information and here are the results:

PS> .\DumpEDID.exe -a
DumpEDID v1.07
Copyright (c) 2006 - 2018 Nir Sofer
Web site: http://www.nirsoft.net



Active                   : Yes
Registry Key             : DISPLAY\SHP153C\4&8e4a58&0&UID8388688
Monitor Name             : LQ156T1JW04
Manufacture Week         : 45 / 2020
ManufacturerID           : 4173 (0x104D)
ProductID                : 5436 (0x153C)
Serial Number (Numeric)  : 0 (0x00000000)
EDID Version             : 1.4
Display Gamma            : 2.20
Image Size               : 34.4 X 19.4 cm (15.5 Inch)
Maximum Image Size       : 34 X 19 cm (15.3 Inch)
Maximum Resolution       : 2560 X 1440
Support Standby Mode     : No
Support Suspend Mode     : No
Support Low-Power Mode   : No
Support Default GTF      : Yes
Digital                  : Yes


Supported Display Modes  :
    2560 X 1440  60 Hz

It says only supported mode is 2560 X 1440 60 Hz, but I have no issues using 2560 X 1440 240 Hz so how does my computer know that my display can be used at 2560 X 1440 240 Hz settings?

user3618431
  • 143

1 Answers1

1

DumpEDID on my computer only shows a few resolutions and modes.
I can see many more in Settings > System > Display.

I can also list more combinations using the Custom Resolution Utility (CRU).

My conclusion is that DumpEDID does a poor job of dumping the EDID, and your display driver does a much better job of it.

harrymc
  • 498,455