[SOLVED] EDID override not loading with Nvidia graphics card

not_kieran_f · 2025-12-28 21:36:19

I've been having issues with my Nvidia graphics card (GTX 980 Ti) reading my monitor's EDID through a DVI to VGA converter. To solve this, I hooked up a laptop with native VGA output and ripped the EDID manually. I then followed the advice I found on this reddit thread to load the ripped EDID, but to no avail.

For posterity, GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub now looks like

GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet drm.edid_firmware=DVI-I-1:edid/daewo.bin video=DVI-I-1:e"

and FILES in /etc/mkinitcpio.conf now looks like

FILES=(/usr/lib/firmware/edid/daewoo.bin)

What's strange is that I get no indication from dmesg that the EDID is being loaded, not even an error.

dmesg -H | grep -i edid

gives me this:

[  +0.000000] Command line: BOOT_IMAGE=/vmlinuz-linux root=/dev/mapper/VolGroup00-lvolroot rw loglevel=3 quiet drm.edid_firmware=DVI-I-1:edid/daewoo.bin video=DVI-I-1:e
[  +0.000013] Kernel command line: BOOT_IMAGE=/vmlinuz-linux root=/dev/mapper/VolGroup00-lvolroot rw loglevel=3 quiet drm.edid_firmware=DVI-I-1:edid/daewoo.bin video=DVI-I-1:e

I futzed around, and I do actually get an error from dmesg if it can't find the EDID file.

[  +0.000000] Command line: BOOT_IMAGE=/vmlinuz-linux root=/dev/mapper/VolGroup00-lvolroot rw loglevel=3 quiet drm.edid_firmware=DVI-I-1:edid/daewo.bin video=DVI-I-1:e
[  +0.000013] Kernel command line: BOOT_IMAGE=/vmlinuz-linux root=/dev/mapper/VolGroup00-lvolroot rw loglevel=3 quiet drm.edid_firmware=DVI-I-1:edid/daewo.bin video=DVI-I-1:e
[  +0.000060] nvidia 0000:09:00.0: Direct firmware load for edid/daewo.bin failed with error -2
[  +0.000003] nvidia 0000:09:00.0: [drm] ERROR [CONNECTOR:92:DVI-I-1] Requesting EDID firmware "edid/daewo.bin" failed (err=-2)
[  +0.000277] nvidia 0000:09:00.0: Direct firmware load for edid/daewo.bin failed with error -2
[  +0.000003] nvidia 0000:09:00.0: [drm] ERROR [CONNECTOR:92:DVI-I-1] Requesting EDID firmware "edid/daewo.bin" failed (err=-2)

Any idea what I could be missing?

Full dmesg log: https://pastebin.com/XS4DeiML
Full /etc/default/grub: https://pastebin.com/KJM5QYGb
Full /etc/mkinitcpio.conf: https://pastebin.com/wzv8cvwU

Last edited by not_kieran_f (2025-12-29 19:14:19)

seth · 2025-12-28 21:43:22

lsinitcpio /boot/initramfs-linux.img | grep daewoo.bin

Did you run mkinitcpio after providing the edid and changing mkinitcpio.conf?

not_kieran_f · 2025-12-28 21:46:26

~$ lsinitcpio /boot/initramfs-linux.img | grep daewoo.bin
usr/lib/firmware/edid/daewoo.bin

I did, yes. Likewise with grub-mkconfig.

seth · 2025-12-28 21:58:39

https://pastebin.com/XS4DeiML does not actually include any edid loading errors?

ls /sys/class/drm/card*
edid-decode /sys/class/drm/card*-DVI-I-1/edid

not_kieran_f · 2025-12-28 22:38:43

No EDID related info at all really. I was lead to believe that I would see something if it were properly loaded.

~$ ls /sys/class/drm/card*
/sys/class/drm/card1:
boot_display  card1-DP-1  card1-DP-2  card1-DP-3  card1-DVI-I-1  card1-HDMI-A-1  dev  device  power  subsystem  uevent

/sys/class/drm/card1-DP-1:
connector_id  device  dpms  edid  enabled  modes  power  status  subsystem  uevent

/sys/class/drm/card1-DP-2:
connector_id  device  dpms  edid  enabled  modes  power  status  subsystem  uevent

/sys/class/drm/card1-DP-3:
connector_id  device  dpms  edid  enabled  modes  power  status  subsystem  uevent

/sys/class/drm/card1-DVI-I-1:
connector_id  device  dpms  edid  enabled  modes  power  status  subsystem  uevent

/sys/class/drm/card1-HDMI-A-1:
connector_id  device  dpms  edid  enabled  modes  power  status  subsystem  uevent

~$ edid-decode /sys/class/drm/card*-DVI-I-1/edid
edid-decode (hex):

00 ff ff ff ff ff ff 00 12 e5 00 00 60 03 00 00
33 05 01 00 08 1b 14 7f e8 0f de 9e 58 4d 97 26
10 47 4f ef d8 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 01 01 01 01 01 01 01 01 00 23

----------------

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.0
  Vendor & Product Identification:
    Manufacturer: DWE
    Model: 0
    Serial Number: 864 (0x00000360)
    Made in: week 51 of 1995
  Basic Display Parameters & Features:
    Analog display
    Signal Level Standard: 0.700 : 0.300 : 1.000 V p-p
    Blank level equals black level
    Sync: Separate
    Maximum image size: 27 cm x 20 cm
    Gamma: 2.27
    DPMS levels: Standby Suspend Off
    RGB color display
  Color Characteristics:
    Red  : 0.6171, 0.3437
    Green: 0.3037, 0.5927
    Blue : 0.1513, 0.0634
    White: 0.2802, 0.3105
  Established Timings I & II:
    IBM     :   720x400    70.081663 Hz   9:5     31.467 kHz     28.320000 MHz
    IBM     :   720x400    87.849542 Hz   9:5     39.444 kHz     35.500000 MHz
    DMT 0x04:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    DMT 0x05:   640x480    72.808802 Hz   4:3     37.861 kHz     31.500000 MHz
    DMT 0x06:   640x480    75.000000 Hz   4:3     37.500 kHz     31.500000 MHz
    DMT 0x08:   800x600    56.250000 Hz   4:3     35.156 kHz     36.000000 MHz
    DMT 0x09:   800x600    60.316541 Hz   4:3     37.879 kHz     40.000000 MHz
    DMT 0x0a:   800x600    72.187572 Hz   4:3     48.077 kHz     50.000000 MHz
    DMT 0x0b:   800x600    75.000000 Hz   4:3     46.875 kHz     49.500000 MHz
    DMT 0x0f:  1024x768i   86.957532 Hz   4:3     35.522 kHz     44.900000 MHz
    DMT 0x10:  1024x768    60.003840 Hz   4:3     48.363 kHz     65.000000 MHz
  Standard Timings: none
  Detailed Timing Descriptors:
    Detailed mode: 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 '..................'
    Detailed mode: 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 '..................'
    Detailed mode: 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 '..................'
    Detailed mode: 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 '..................'
Checksum: 0x23

So, the EDID override is being loaded after all.

~$ xrandr 
Screen 0: minimum 8 x 8, current 1024 x 768, maximum 16384 x 16384
DVI-I-0 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768      60.00*+
   1600x900      59.82  
   1400x900      59.88  
   1368x768      59.88    59.85  
   1280x800      59.91    59.81  
   1280x720      59.86    59.74  
   1024x576      59.90    59.82  
   960x540       59.82    59.63  
   864x486       59.92    59.57  
   800x600       72.19    60.32    56.25  
   800x450       59.82  
   700x450       59.88  
   684x384       59.88    59.85  
   640x480       59.94  
   640x400       59.98    59.88  
   640x360       59.86    59.83  
   512x384       60.00  
   512x288       60.00    59.92  
   480x270       59.82    59.63  
   432x243       59.92    59.57  
   400x300       72.19  
   320x240       60.05  
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
DP-5 disconnected (normal left inverted right x axis y axis)

Still using the fallback resolutions though. I'm not sure what I'm missing here. The monitor is plugged into the only DVI port on my machine, but it's listed as DVI-I-0 instead of DVI-I-1... which is in turn listed as disconnected. Does this have anything to do with dual-link? No luck with changing DVI-I-1 to DVI-I-0 in /etc/default/grub either.

Last edited by not_kieran_f (2025-12-28 22:39:21)

seth · 2025-12-28 22:50:34

There is *an* edid in /sys/class/drm/card1-DVI-I-1/edid but that edid looks sorta bogus and also only advertises up to XGA

cat /usr/lib/firmware/edid/daewoo.bin | curl -F 'file=@-' 0x0.st

I'll point out that nvidia actually has its own X11 option to pick a random edid, https://download.nvidia.com/XFree86/Lin … tions.html - look for "CustomEDID"

not_kieran_f · 2025-12-28 23:55:07

http://0x0.st/Pil_.bin I'm not expecting more than XGA to be frank, It's a CRT from 1995 . I mostly wanted the ability to use some of the higher refresh rate modes.

I tried setting up a file in xorg.conf.x for CustomEDID, but I'm not certain I'm doing it right.

~$ lspci -d ::03xx
09:00.0 VGA compatible controller: NVIDIA Corporation GM200 [GeForce GTX 980 Ti] (rev a1)
~$ cat /etc/X11/xorg.conf.d/10-daewoo-edid.conf 
Section "Device"
	Identifier "nvidia"
	Driver "nvidia"
	BusID "PCI:9:0:0"
	Option "CustomEDID" "CRT-0:/usr/lib/firmware/edid/daewoo.bin"
EndSection

No change from xrandr at least.

seth · 2025-12-29 00:03:30

Ahhh… you're hoping to get the interlaced 87Hz mode

Option "ModeDebug" "True"

will make the driver print to the log what modes it filters and why.
You can btw. also add completely random modelines but will require

Option "ModeValidation" "AllowNonEdidModes"

not_kieran_f · 2025-12-29 18:28:57

Typo in the xorg config left me with an unresponsive screen of multicolored fuzz... I would've hoped that it would fall through into a login shell, but I guess not. Quick fix once I booted into a live usb.

Looking through the xorg log with debug mode on has been insightful though. In particular, it seems to be reading and promptly rejecting my EDID.

[     9.190] (WW) NVIDIA(GPU-0): The EDID read for display device DVI-I-0 is invalid:
[     9.190] (WW) NVIDIA(GPU-0): - The EDID has a bad detailed timing descriptor.

Looking at the file, the standard and detailed timing description areas are padded with 0x01. I'm fairly confident that the EDID is valid otherwise (correct dimensions, correct manufacturing date, etc.) so I'll try editing those to be zero.

Full xorg log: https://0x0.st/Piht.txt

not_kieran_f · 2025-12-29 19:13:43

I also needed to add NoExtendedGpuCapabilitiesCheck and NoVertRefreshCheck to ModeValidation in my xorg configuration file, but it seems to be working like a charm now. I tried going back and overriding the EDID with the edited one via kernel options, but no dice... it shows up under /sys/class/drm/card1-DVI-I-1/edid, but none of the modes appear in xrandr. Oh well. Thank you for the help, seth!

seth · 2025-12-29 19:18:22

I tried going back and overriding the EDID with the edited one via kernel options, but no dice... it shows up under /sys/class/drm/card1-DVI-I-1/edid, but none of the modes appear in xrandr.

If you've the edid in the initramfs (if not, try) - did you maybe forget to update the initramfs for this?
Do you still limit the modevalidation (the driver would likely still identify the contradiction)

bloodnok · 2026-02-18 08:29:37

not_kieran_f wrote:

For posterity, GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub now looks like
GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet drm.edid_firmware=DVI-I-1:edid/daewo.bin video=DVI-I-1:e"
and FILES in /etc/mkinitcpio.conf now looks like
FILES=(/usr/lib/firmware/edid/daewoo.bin)

I believe this didn't work because of the "daewo" vs. "daewoo" typo.

Arch Linux

#1 2025-12-28 21:36:19

[SOLVED] EDID override not loading with Nvidia graphics card

#2 2025-12-28 21:43:22

Re: [SOLVED] EDID override not loading with Nvidia graphics card

#3 2025-12-28 21:46:26

Re: [SOLVED] EDID override not loading with Nvidia graphics card

#4 2025-12-28 21:58:39

Re: [SOLVED] EDID override not loading with Nvidia graphics card

#5 2025-12-28 22:38:43

Re: [SOLVED] EDID override not loading with Nvidia graphics card

#6 2025-12-28 22:50:34

Re: [SOLVED] EDID override not loading with Nvidia graphics card

#7 2025-12-28 23:55:07

Re: [SOLVED] EDID override not loading with Nvidia graphics card

#8 2025-12-29 00:03:30

Re: [SOLVED] EDID override not loading with Nvidia graphics card

#9 2025-12-29 18:28:57

Re: [SOLVED] EDID override not loading with Nvidia graphics card

#10 2025-12-29 19:13:43

Re: [SOLVED] EDID override not loading with Nvidia graphics card

#11 2025-12-29 19:18:22

Re: [SOLVED] EDID override not loading with Nvidia graphics card

#12 2026-02-18 08:29:37

Re: [SOLVED] EDID override not loading with Nvidia graphics card

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