[FIXED] primary screen shutting off and on when freesync is disabled

Kazeno · 2025-02-10 14:15:35

# Issue :
A few days ago, after rebooting my PC i noticed a strange and really annoying behaviour :
- With my secondary monitor plugged in, my primary monitor keeps shutting down
- sometimes it comes back on, but shuts down imediatly when i interecxt with something on it
- it is not a hardware issue as it works flawlessly in other OS -it's not a WM or DM issue eitheir as the same happens in TTY and with other DM/WM

i tried to see any relevant issues in journalctl but couldn't find any.
I'd like to be able to disable freesync as it causes annoying flickers on VA panels
# System info :
- OS : Arch Linux 6.13.1
- CPU : ryzen 7 5800X
- GPU : AMD radeon RX7800XT
- Display manager : ly-dm
- Hyprland
- Displays :
- DP-3 : MSI G27CQ4
- HDMI-A-1 : ASUS VG278

Last edited by Kazeno (2025-02-12 23:52:52)

seth · 2025-02-10 20:24:10

flawlessly in other OS

3rd link below. Mandatory.
Disable it (it's NOT the BIOS setting!) and reboot windows and linux twice for voodo reasons.

- Display manager : ly-dm
- Hyprland

Do you have the same issue w/ an X11 session?

I'd like to be able to disable freesync as it causes annoying flickers on VA panels

https://wiki.archlinux.org/title/Variab … e#Hyprland

Kazeno · 2025-02-10 22:28:21

Windows fast boot was disable for many years already, unless one of their shitty update resurected it.

I did not try with any X-11 session, I tried running hyprland and tty with sddm though, but the issue still persists

thx for the tip didn't think of it for the flicker, looks like it worked. didn't think of it.

edit : even with

 vrr=0

in hyprland.conf, there are still flickers

Last edited by Kazeno (2025-02-10 23:05:43)

seth · 2025-02-11 06:06:55

I did not try with any X-11 sessionI did not try with any X-11 session

Well… do? You need to figure whether the problem is w/ the compositor or a lower level.

Kazeno · 2025-02-12 01:29:49

I couldn't try today or yesterday, I'll try when I can but I don't think it comes from the compositor, I get black screen for a few seconds even before loading a compositor

seth · 2025-02-12 08:16:14

You're aware that the compositor is the wayland display server?
You mean you get this at the console level (during the boot or on an agetty login)?

https://wiki.archlinux.org/title/Variab … nc_enabled

For X11 you could see whether async flipping helps in any way:
https://wiki.archlinux.org/title/Variab … figuration

But those would rather concern freesync being *en*abled.

Might be PSR?
"amdgpu.dcdebugmask=0x10", https://wiki.archlinux.org/title/Kernel_parameters (but this is typically an issue w/ notebook panels only)

Kazeno · 2025-02-12 23:44:18

Okay my bad, i though it happened before ly-dm was loaded but no, the cause was ly-dm, maybe a recent update broke it for me, i'll try reverting to an earlier build. Also i though i had tried SDDM but nope i only thought of it really hard XD
I tried disabling ly, then rebooted and it worked so i tried with ssdm and it works fine.

thanks for your help, i wouldn't have tested things without you making me think of them.

edit : just checked the repo for ly, no commits since october, so it's not an update that caused the issue

Last edited by Kazeno (2025-02-13 00:14:54)

seth · 2025-02-13 07:40:44

Some script?
Please nb. that ly is notorious for not integrating w/ logind and breaking the session bus, so if you've any dbus scripts around that topic, they'll likely misbehave.

Arch Linux

#1 2025-02-10 14:15:35

[FIXED] primary screen shutting off and on when freesync is disabled

#2 2025-02-10 20:24:10

Re: [FIXED] primary screen shutting off and on when freesync is disabled

#3 2025-02-10 22:28:21

Re: [FIXED] primary screen shutting off and on when freesync is disabled

#4 2025-02-11 06:06:55

Re: [FIXED] primary screen shutting off and on when freesync is disabled

#5 2025-02-12 01:29:49

Re: [FIXED] primary screen shutting off and on when freesync is disabled

#6 2025-02-12 08:16:14

Re: [FIXED] primary screen shutting off and on when freesync is disabled

#7 2025-02-12 23:44:18

Re: [FIXED] primary screen shutting off and on when freesync is disabled

#8 2025-02-13 07:40:44

Re: [FIXED] primary screen shutting off and on when freesync is disabled

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