EDID-Overclock

Custom EDID firmware profile

A shell script that installs a custom EDID firmware on Linux, enabling monitor refresh rate overclocking beyond what the panel advertises. Handles initramfs embedding, kernel parameter injection, and bootloader configuration automatically.

Tested on my PC: UHD 620, BOE 1920x1080 60hz and CachyOS (Wayland)
Requirements: mkinitcpio, wxEDID and GRUB.

its not that hard, I promise

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Guide

Replace 75, edid_75hz.bin card-eDPI-1 and eDP-1 with your target refresh rate/resolution, file name and output name.

1. Find your display output name

ls /sys/class/drm/

2. Extract your current EDID

cat /sys/class/drm/card1-eDP-1/edid > edid_original.bin

3. Calculate the new timings

cvt 1920 1080 75

4. Edit the EDID in wxEDID Open edid_original.bin in wxEDID and find the DTD you want to replace (e.g. the 48Hz one). Set the new timings from the cvt output. Mind sync polarity: CVT outputs -hsync +vsync, make sure wxEDID matches that. Save as edid_75hz.bin.

5. Install

chmod +x edid-apply.sh
sudo ./edid-apply.sh install edid_75hz.bin eDP-1

If your bootloader wasn't detected

sudo ./edid-apply.sh install edid_75hz.bin eDP-1 --bootloader systemd-boot

6. Reboot and verify

kscreen-doctor -o

Your target refresh rate/resolution should now appear in the list.

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Removing

sudo ./edid-apply.sh remove edid_75hz.bin

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Notes

• Black screens are usually caused by wrong sync polarity, not the pixel clock being too high — eDP panels often accept much higher clocks than their EDID advertises
• If you get a black screen after rebooting, edit the bootloader entry at boot time (press e in GRUB), remove the drm.edid_firmware=... parameter and boot. Then run the remove command above
• This script modifies the EDID reported to your system. Use at your own risk. I'm not responsible for any instability or damage.

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Maintained by: louzkk 🇧🇷