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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

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Help with Custom EDID (lemmy.ml)

submitted 5 months ago* (last edited 5 months ago) by Artemis_Mystique@lemmy.ml to c/linux@lemmy.ml

16 comments fedilink hide all child comments

Edit: Solved, while changing EDID make sure to remove the old module first and reinstall it with the new EDID

I have a faulty DP to HDMI adapter, that unfortunately never seems to parse the EDID data, so while connecting to a TV I used this guide and a 1920x1080.bin file from the internet and it worked, but unfortunately I was unable to use the TV speakers(I guessed the EDID file didn't specify that the device had audio out)

Using a separate pc I extracted my TVs EDID.bin file and repeated the steps but unfortunately, it just doesn't work, its stuck on the old 1920x1080.bin(I can tell because it shows up as 'Linux Foundation 23'') The issue persists even after I delete the old .bin file from /usr/lib/firmware/edid

I am using wayland

System info:

OS: Fedora Linux 40 (Workstation Editi 
Host: TECRA R940 PT439V-03U02WAR 
Kernel: 6.8.11-300.fc40.x86_64 
Uptime: 29 mins 
Packages: 2209 (rpm), 32 (flatpak) 
Shell: bash 5.2.26 
Resolution: 1920x1080 
DE: GNOME 46.2 
WM: Mutter 
WM Theme: Adwaita 
Theme: Adwaita [GTK2/3] 
Icons: Adwaita [GTK2/3] 
Terminal: gnome-terminal 
CPU: Intel i7-3540M (4) @ 3.700GHz 
GPU: AMD ATI Radeon HD 7550M/7570M/765 
Memory: 1998MiB / 7879MiB

Dmesg -H

[Jun20 22:26] Linux version 6.8.11-300.fc40.x86_64 (mockbuild@f09cc32e12c24ed6a1a66c2a2e9f1728) (gcc (GCC) 14.1.1 20240522 (Red Hat 14.1.1-4), GNU ld version 2.41-37.fc40) #1 SMP PREEMPT_DYNAMIC Mon May 27 14:53:33 UTC 2024
[  +0.000000] Command line: BOOT_IMAGE=(hd0,gpt2)/vmlinuz-6.8.11-300.fc40.x86_64 root=UUID=XXXXX ro rootflags=subvol=root rhgb quiet drm.edid_firmware=DP-2:edid/sony.bin

Any help is appreciated

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[–] SteveTech@programming.dev 4 points 5 months ago (7 children)

Is edid/sony.bin your new EDID? Does it revert back if you remove drm.edid_firmware all together?

Also, do you mind sharing your EDID? I had to edit mine to get VRR to work, so maybe there's something invalid in yours. It does contain serial numbers though if that's a problem.

[–] ashaman2007@lemm.ee 3 points 5 months ago (2 children)

What did you have to change for VRR? I’m also having an issue where I need to force the EDID and haven’t been able to get VRR

[–] SteveTech@programming.dev 3 points 5 months ago (1 children)

I wrote a guide here: stevetech.me/posts/force-enable-vrr-edid

But it was mostly just changing random things and hoping for the best, so YMMV. I hope it helps!

[–] ashaman2007@lemm.ee 3 points 5 months ago

Thank you!

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