.bin file is not applied after reboot

[pat-s]

Trying to get the following .S file working. The settings worked before on a Xorg machine.

/* 2560x1440_50hz: Modeline "2560x1440_50hz" 200.25 2560 2608 2640 2720 1440 1443 1448 1474 +HSync -Vsync */
#define HSYNC_POL 1
#define VSYNC_POL 1
#define YPULSE (63+5)
#define XPULSE 32
#define YPIX 1440
#define XPIX 2560
#define VFREQ 50
#define DPI 96
#define CLOCK 200250
#define VERSION 1
#define REVISION 3
#define XOFFSET 48
#define YOFFSET (63+3)
#define XY_RATIO XY_RATIO_16_9
#define YBLANK 34
#define XBLANK 160
#define TIMING_NAME "2560x1440_50hz"
#include "edid.S"

Applying it in /etc/default/grub as a kernel parameter with GRUB_CMDLINE_LINUX="drm_kms_helper.edid_firmware=HDMI-A-2:edid/2560x1440_50hz.bin".

However, the resolution does not apply after boot and is not selectable.
I also tried to load the .bin file in early KMS as suggested here but without success.

I'm on Arch GNOME. Any ideas what I am missing?

FYI, I also get the warnings reported in #5 .

[parkerlreed]

The kernel argument changed a few versions back.

drm.edid_firmware may work better.

[pat-s]

Thanks for the hint. Tried that already and it didn't had an effect. I get the warnings reported in #11 during boot. That's probably the issue.

[JKJameson]

You have to force-on the display like this
drm.edid_firmware=DP-1:edid/2560x1440.bin video=DP-1:e