The screen show incorrect image when using custom EDID file on ubuntu

NVIDIA Open GPU Kernel Modules Version

550.90.07

Please confirm this issue does not happen with the proprietary driver (of the same version). This issue tracker is only for bugs specific to the open kernel driver.

• I confirm that this does not happen with the proprietary driver package.

Operating System and Version

Ubuntu 22.04.4 LTS

Kernel Release

Linux demo 6.5.0-41-generic #41~22.04.2-Ubuntu SMP PREEMPT_DYNAMIC Mon Jun 3 11:32:55 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

Please confirm you are running a stable release kernel (e.g. not a -rc). We do not accept bug reports for unreleased kernels.

• I am running on a stable kernel release.

Hardware: GPU

NVIDIA GeForce RTX 3070 (UUID: GPU-6876e04a-68a4-5e19-e878-92ec308679d4)

Describe the bug

I developed a program to output images by DRM, with libdrm 2.4.113.

When with the default EDID from monitor, the screen shows correct color (output red color).

But it shows error when using custom EDID ( even use the same EDID as the monitor).

To Reproduce

1. override edid: echo HDMI-A-1:edid/custom-edid.bin > /sys/module/drm/parameters/edid_firmware
2. run test program to output red color: sudo ./test 1000 0 0
3. check the monitor output
   test.zip

Bug Incidence

Always

nvidia-bug-report.log.gz

nvidia-bug-report.log.gz

More Info

No response

Start by inspecting test.zip and nvidia-bug-report.log.gz, then reproduce on Ubuntu 22.04.4 with kernel 6.5.0-41 and driver 550.90.07 using the documented custom EDID override. Compare the DRM program's output with the default and custom EDID cases; done means the custom EDID path produces the same correct red image or the driver limitation is documented.