this post was submitted on 14 Aug 2024
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VRR toggle visible on internal Laptop monitor but not for External FreeSync Monitor in GNOME (discuss.tchncs.de)
submitted 2 months ago by Sentau@discuss.tchncs.de to c/linux@lemmy.ml
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I have a AMD CPU + AMD dGPU laptop and recently bought a LG FreeSync monitor. I hooked up the monitor to my laptop and got it working mostly fine but I dont get any option to set VRR on my LG monitor.

I am on Gnome and have enabled VRR through gsettings. My laptop display shows the option to toggle VRR (and is currently being used with VRR on) but my LG display does not. The Archwiki says that the option to toggle VRR should show up on every supported display. I have verified from the user manual that FreeSync is supported over both HDMI and DP and from the monitors menu, I have verified that FreeSync is enabled. Is this a bug or I am missing something.

Hardware and Software

  • Ryzen 5 5600H with Vega integrated graphics
  • Radeon RX 5500M
  • Internal Display of 1080p, 144Hz (I have no idea which panel it is)
  • LG 24GS60F-B monitor connected over HDMI 2.0
  • uBlue main 40 (Fedora Silverblue 40)
  • GNOME 46.4
  • Kernel version 6.10.3
  • Mesa 24.1.5

Thanks in advance for the help.

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[–] CalcProgrammer1@lemmy.ml 3 points 2 months ago (1 children)

How is the external display connected? I have never seen Freesync over HDMI work. The early implementations were AMD proprietary and the new ones require HDMI 2.1 which has some ridiculous bullshit about not being implemented by open source drivers. HDMI sucks, use DisplayPort if possible. If your laptop doesn't have a DisplayPort connector, try a USB-C to DisplayPort cable, as usually the type C ports on laptops support DisplayPort alt mode.

[–] Sentau@discuss.tchncs.de 2 points 2 months ago

Yeah I agree that HDMI sucks but unfortunately my Laptop doesn't have any Display Port and my USB-C port doesn't have display port alt mode.

I have never seen Freesync over HDMI work.

Is this your experience on all OSes or on Linux only¿? AMD does mention on their website that many displays support freesync over HDMI.