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#1 2022-01-08 05:30:17

K4LCIFER
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Registered: 2021-10-04
Posts: 70

Unknown display error after installing an AMD GPU

For some reason I am unable to change the resolution or refresh rate of my main monitor. When I try to modify the display settings in gnome, it doesn't give any other resolution or refresh rate, and just says "unknown display". I have recently changed from nvidia to amd, and on nvidia it worked just fine. this is what I'm seeing on my monitor.

- Gnome Wayland on Arch Linux
- Monitor: Asus ROG Swift PG278Q 1440p 144Hz Gsync monitor
- GPU: AMD Radeon RX 6600

lspci | grep -i VGA`

outputs:

03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 23 [Radeon RX 6600/6600 XT/6600M] (rev c7)

Drivers installed:
- `mesa`
- `xf86-video-amd`
- `vulkan-radeon`
- `libva-mesa-driver`

My secondary monitor which is a generic Asus 1080p monitor works fine, and I tried an Ubuntu live USB and it had the exact same problem

EDIT1: It is worth mentioning that I have tested the monitor and graphics card on windows and everything works fine. No resolution or refresh rate issues. No unknown display. Drivers are downloaded properly. The issue is with the Linux Kernel.

Last edited by K4LCIFER (2022-01-08 21:44:29)

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#2 2022-01-08 08:40:17

seth
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Re: Unknown display error after installing an AMD GPU

Please post your xorg log, https://wiki.archlinux.org/title/Xorg#General and the output of "xrandr -q"

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#3 2022-01-08 09:09:51

K4LCIFER
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Registered: 2021-10-04
Posts: 70

Re: Unknown display error after installing an AMD GPU

seth wrote:

Please post your xorg log, https://wiki.archlinux.org/title/Xorg#General and the output of "xrandr -q"

I’m on Wayland so no xrandr nor Xorg log I don’t think.

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#4 2022-01-08 09:14:36

seth
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Re: Unknown display error after installing an AMD GPU

Well, you mentioned xf86-video-amd and (I kinda overread "Gnome Wayland"…)
Please try the behavior on gnome/xorg so we can gather some information.
You might have to go for https://wiki.archlinux.org/title/Kernel … s_and_EDID if no edid can be obtained from the output (is there any dock/adapter involved?)

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#5 2022-01-08 21:41:37

K4LCIFER
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Registered: 2021-10-04
Posts: 70

Re: Unknown display error after installing an AMD GPU

seth wrote:

Well, you mentioned xf86-video-amd and (I kinda overread "Gnome Wayland"…)
Please try the behavior on gnome/xorg so we can gather some information.
You might have to go for https://wiki.archlinux.org/title/Kernel … s_and_EDID if no edid can be obtained from the output (is there any dock/adapter involved?)

After you mentioned EDID, I did some digging, and it looks like my issue is a bug... a bug that has been unsolved for 3 years. And for whatever reason, it seems that its commonly only the PG278Q which is the exact monitor that I have.

Last edited by K4LCIFER (2022-01-08 21:42:35)

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#6 2022-01-08 22:00:59

seth
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Re: Unknown display error after installing an AMD GPU

For xrandr (thus X11) you could  try

% cvt12 2560 1440 144 -b
# 2560x1440 @ 144.000 Hz Reduced Blank (CVT) field rate 144.000 Hz; hsync: 222.192 kHz; pclk: 586.59 MHz
Modeline "2560x1440_144.00_rb2"  586.59  2560 2568 2600 2640  1440 1529 1537 1543 +hsync -vsync

https://wiki.archlinux.org/title/Xrandr … esolutions

For the console (and wayland) see https://raw.githubusercontent.com/torva … modedb.rst
"2560x1440@120R" might work, but I assume cvt1.2 calculations aren't supported, so "2560x1440@144R" would be invalid.

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#7 2022-01-08 22:22:31

progandy
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Posts: 5,307

Re: Unknown display error after installing an AMD GPU

K4LCIFER wrote:

After you mentioned EDID, I did some digging, and it looks like my issue is a bug... a bug that has been unsolved for 3 years. And for whatever reason, it seems that its commonly only the PG278Q which is the exact monitor that I have.

Can you try to extract the edid with get-edid from the read-edid package and then setting it as a kernel parameter? It looks like nobody tried that yet.
https://wiki.archlinux.org/title/Kernel … s_and_EDID
Edit: ddcutil detect --verbose could also be an option

Or extract it on windows with Monitor Asset Manager (suggested by Dell) or DumpEDID by nirsoft. (though that seemed to fail for one of the reporters). Maybe you can extract the ID and try to repair it with wxedid.

Last edited by progandy (2022-01-08 22:33:14)

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#8 2022-01-08 22:31:44

K4LCIFER
Member
Registered: 2021-10-04
Posts: 70

Re: Unknown display error after installing an AMD GPU

progandy wrote:
K4LCIFER wrote:

After you mentioned EDID, I did some digging, and it looks like my issue is a bug... a bug that has been unsolved for 3 years. And for whatever reason, it seems that its commonly only the PG278Q which is the exact monitor that I have.

Can you try to extract the edid with get-edid from the read-edid package and then setting it as a kernel parameter? It looks like nobody tried that yet.
https://wiki.archlinux.org/title/Kernel … s_and_EDID
Edit: ddcutil detect --verbose could also be an option

Or extract it on windows with Monitor Asset Manager (suggested by Dell) or DumpEDID by nirsoft.

Okay so I tried get-edid from read-edid, and it output the following:

This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
Looks like no busses have an EDID. Sorry!
Attempting to use the classical VBE interface

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
	Function supported
	Call successful

	VBE version 300
	VBE string at 0xc0384 "AMD ATOMBIOS"

VBE/DDC service about to be called
	Report DDC capabilities

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f15 bx=0x0 cx=0x0
	Function supported
	Call successful

	Monitor and video card combination does not support DDC1 transfers
	Monitor and video card combination supports DDC2 transfers
	0 seconds per 128 byte EDID block transfer
	Screen is not blanked during DDC transfer

Reading next EDID block

VBE/DDC service about to be called
	Read EDID

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
	Function supported
	Call failed

The EDID data should not be trusted as the VBE call failed
Error: output block unchanged
I'm sorry nothing was successful. Maybe try some other arguments
if you played with them, or send an email to Matthew Kern <pyrophobicman@gmail.com>.

It appears to have encountered an error.

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#9 2022-01-08 22:37:27

progandy
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Registered: 2012-05-17
Posts: 5,307

Re: Unknown display error after installing an AMD GPU

So that runs into the same error as the detection through the graphics card. If you can connect it to a different graphics card with the same ports, maybe that can help to extract the edid.

| alias CUTF='LANG=en_XX.UTF-8@POSIX ' | alias ENGLISH='LANG=C.UTF-8 ' |

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#10 2022-01-08 22:54:02

K4LCIFER
Member
Registered: 2021-10-04
Posts: 70

Re: Unknown display error after installing an AMD GPU

progandy wrote:

So that runs into the same error as the detection through the graphics card. If you can connect it to a different graphics card with the same ports, maybe that can help to extract the edid.

Alright I swapped out the AMD RX6600 for a GTX 1080 (which works perfectly fine with my monitor) and got the following output:

This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
Looks like no busses have an EDID. Sorry!
Attempting to use the classical VBE interface

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
	Function supported
	Call successful

	VBE version 300
	VBE string at 0x11100 "NVIDIA"

VBE/DDC service about to be called
	Report DDC capabilities

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f15 bx=0x0 cx=0x0
	Function supported
	Call successful

	Monitor and video card combination does not support DDC1 transfers
	Monitor and video card combination does not support DDC2 transfers
	0 seconds per 128 byte EDID block transfer
	Screen is not blanked during DDC transfer

Reading next EDID block

VBE/DDC service about to be called
	Read EDID

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
	Function supported
	Call failed

The EDID data should not be trusted as the VBE call failed
Error: output block unchanged
I'm sorry nothing was successful. Maybe try some other arguments
if you played with them, or send an email to Matthew Kern <pyrophobicman@gmail.com>.

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#11 2022-01-08 22:55:30

seth
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Registered: 2012-09-03
Posts: 74,307

Re: Unknown display error after installing an AMD GPU

If you start an X11 server on that card, do you have the edid in the log?

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#12 2022-01-08 23:00:47

K4LCIFER
Member
Registered: 2021-10-04
Posts: 70

Re: Unknown display error after installing an AMD GPU

seth wrote:

If you start an X11 server on that card, do you have the edid in the log?

Using the GTX 1080 with an nvidia driver running X11:

I searched for logs containing edid and found the following:

14:46:49 sudo:    <username> : TTY=pts/0 ; PWD=/home/<username> ; USER=root ; COMMAND=/usr/bin/get-edid
14:46:47 dbus-daemon: [system] Activating via systemd: service name='org.freedesktop.home1' unit='dbus-org.freedesktop.home1.service' requested by ':1.74' (uid=0 pid=1055 comm="sudo get-edid ")
14:46:24 gsd-color: failed to set xrandr-Ancor Communications Inc-ROG PG278Q-#ASMfYkLjO7/d color transform matrix: failed to load file: Error opening file /var/lib/gdm/.local/share/icc/edid-252b8cd111d1b3b641c7db217eec7c36.icc: Permission denied
14:46:24 gsd-color: failed to set xrandr-Ancor Communications Inc-ROG PG278Q-#ASMfYkLjO7/d color transform matrix: failed to load file: Error opening file /var/lib/gdm/.local/share/icc/edid-252b8cd111d1b3b641c7db217eec7c36.icc: Permission denied
14:46:24 gsd-color: failed to set xrandr-Ancor Communications Inc-ROG PG278Q-#ASMfYkLjO7/d color transform matrix: failed to load file: Error opening file /home/<username>/.local/share/icc/edid-252b8cd111d1b3b641c7db217eec7c36.icc: Permission denied
14:46:24 gsd-color: failed to set xrandr-Ancor Communications Inc-ASUS VS247-EALMTF112264 color transform matrix: failed to load file: Error opening file /home/<username>/.local/share/icc/edid-4b4344b3bc0a6cf4809519faad73d54e.icc: Permission denied
14:46:24 gsd-color: failed to set xrandr-Ancor Communications Inc-ASUS VS247-EALMTF112264 color transform matrix: failed to load file: Error opening file /home/<username>/.local/share/icc/edid-4b4344b3bc0a6cf4809519faad73d54e.icc: Permission denied
14:46:22 Xorg: (--) NVIDIA(0): DPI set to (108, 107); computed from "UseEdidDpi" X config
14:46:22 Xorg: (--) NVIDIA(0): DPI set to (108, 107); computed from "UseEdidDpi" X config
14:46:16 Xorg: (--) NVIDIA(0): DPI set to (108, 107); computed from "UseEdidDpi" X config

Last edited by K4LCIFER (2022-01-08 23:03:13)

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#13 2022-01-08 23:17:06

progandy
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Registered: 2012-05-17
Posts: 5,307

Re: Unknown display error after installing an AMD GPU

I found an extracted EDID here: https://3dvision-blog.com/forum/viewtop … 698#p22698
Converted to modeline and edid file:

Modeline "2560x1440"   538.76   2560 2564 2580 2582   1440 1441 1442 1449  +hsync +vsync
printf "%s" "00ffffffffffff000469b127758201002b180104a53c2278064ce1a55850
a0230b505400000001010101010101010101010101010101565e00a0a0a0
29503020350056502100001a000000ff002341534e536230494c30655064
000000fd001e961ed236010a202020202020000000fc00524f4720504732
3738510a2020015002030a01654b040001015a8700a0a0a03b5030203500
56502100001a5aa000a0a0a046503020350056502100001a6fc200a0a0a0
55503020350056502100001a74d20016a0a009500410110056502100001e
1c2500a0a0a011503020350056502100001a000000000000000000000000
000000000000000000000000000000af" | xxd -r -p >/tmp/rogswift.edid

parse-edid does not show everything, but wxedid or edid-decode-git do.

| alias CUTF='LANG=en_XX.UTF-8@POSIX ' | alias ENGLISH='LANG=C.UTF-8 ' |

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#14 2022-01-08 23:20:48

K4LCIFER
Member
Registered: 2021-10-04
Posts: 70

Re: Unknown display error after installing an AMD GPU

progandy wrote:

I found an extracted EDID here: https://3dvision-blog.com/forum/viewtop … 698#p22698
Converted to modeline and edid file:

Modeline "2560x1440"   538.76   2560 2564 2580 2582   1440 1441 1442 1449  +hsync +vsync
printf "%s" "00ffffffffffff000469b127758201002b180104a53c2278064ce1a55850
a0230b505400000001010101010101010101010101010101565e00a0a0a0
29503020350056502100001a000000ff002341534e536230494c30655064
000000fd001e961ed236010a202020202020000000fc00524f4720504732
3738510a2020015002030a01654b040001015a8700a0a0a03b5030203500
56502100001a5aa000a0a0a046503020350056502100001a6fc200a0a0a0
55503020350056502100001a74d20016a0a009500410110056502100001e
1c2500a0a0a011503020350056502100001a000000000000000000000000
000000000000000000000000000000af" | xxd -r -p >/tmp/rogswift.edid

parse-edid does not show everything, but wxedid or edid-decode-git do.

Do I paste both of those into the terminal?

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#15 2022-01-08 23:23:55

progandy
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Registered: 2012-05-17
Posts: 5,307

Re: Unknown display error after installing an AMD GPU

The first one is a modeline for an xorg configuration file. https://wiki.archlinux.org/title/Xrandr … esolutions

The second one is a terminal command that uses xxd (part of vim) to convert the hex data to a binary file.

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#16 2022-01-08 23:26:29

K4LCIFER
Member
Registered: 2021-10-04
Posts: 70

Re: Unknown display error after installing an AMD GPU

progandy wrote:

The first one is a modeline for an xorg configuration file. https://wiki.archlinux.org/title/Xrandr … esolutions

The second one is a terminal command that uses xxd (part of vim) to convert the hex data to a binary file.

Where is said binary file supposed to go?

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#17 2022-01-08 23:33:05

progandy
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Registered: 2012-05-17
Posts: 5,307

Re: Unknown display error after installing an AMD GPU

K4LCIFER wrote:
progandy wrote:

The first one is a modeline for an xorg configuration file. https://wiki.archlinux.org/title/Xrandr … esolutions

The second one is a terminal command that uses xxd (part of vim) to convert the hex data to a binary file.

Where is said binary file supposed to go?

That is covered here:
https://wiki.archlinux.org/title/Kernel … _KMS_start
https://wiki.archlinux.org/title/Kernel … s_and_EDID

For testing by writing to paths in /sys as described there, the location is not important. For permanent usage see the paths in the early kms section.

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#18 2022-01-09 01:11:09

K4LCIFER
Member
Registered: 2021-10-04
Posts: 70

Re: Unknown display error after installing an AMD GPU

progandy wrote:
K4LCIFER wrote:
progandy wrote:

The first one is a modeline for an xorg configuration file. https://wiki.archlinux.org/title/Xrandr … esolutions

The second one is a terminal command that uses xxd (part of vim) to convert the hex data to a binary file.

Where is said binary file supposed to go?

That is covered here:
https://wiki.archlinux.org/title/Kernel … _KMS_start
https://wiki.archlinux.org/title/Kernel … s_and_EDID

For testing by writing to paths in /sys as described there, the location is not important. For permanent usage see the paths in the early kms section.

Okay, so, I tried following the guide you posted here, by doing the following:
1. I ran the command that generated rogswift.bin
2. I created a folder in /usr/lib/firmware called edid
3. I placed rogswift.bin in /usr/lib/firmware/edid
4. In /etc/default/grub, I added GRUB_CMDLINE_LINUX="drm.edid_firmware=edid/rogswift.bin"
5. I ran grub-mkconfig -o /boot/grub/grub.cfg
6. reboot

after doing all that the problem was still unsolved.

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#19 2022-01-09 07:38:40

seth
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From: Don't DM me only for attention
Registered: 2012-09-03
Posts: 74,307

Re: Unknown display error after installing an AMD GPU

You didn't add the file to the initramfs? - https://wiki.archlinux.org/title/Kernel … mkinitcpio
Can you post an updated system journal as well as your xorg log, https://wiki.archlinux.org/title/Xorg#General

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