(Linux) 30hz locked on External 4KTV.

[Dritzzka]

Hardware: Lenovo Legion 7 with a RX 6850m XT.
Mux switch is igpu
Distro is Fedora 39.

My issue is when I hook up a 4KTV via HDMI, the game or proton locks the game at 30hz/30fps. I do have this display set to 4K@60HZ in Gnome's display properties.

I have tried setting dual displays and even trying turning the laptop display off.
Nothing has worked.

Also of note running the game on the laptop display is fine and runs buttery smooth 1600P@60

Under windows 11>everything works

[SEATEK The_LEFTY]

Yeah...

[OrigamiKingdom]

If you lower your resolution to 1080p is 60 and option?

4K at 60 requires modern ports and cables to support since it needs to push more data than early HDMI's had. In those cases 4K runs at 30fps and that sounds like your are most likely running into

I'm not totally sure what all your situation is though. Same laptop same cables same TV? Desktop is running? Maybe it's just a performance difference with Linux

[Dritzzka]

Originally posted by OrigamiKingdom:

If you lower your resolution to 1080p is 60 and option?

4K at 60 requires modern ports and cables to support since it needs to push more data than early HDMI's had. In those cases 4K runs at 30fps and that sounds like your are most likely running into

I'm not totally sure what all your situation is though. Same laptop same cables same TV? Desktop is running? Maybe it's just a performance difference with Linux

I did try that in game but the TV is still reporting 30fps.
There isn't a way to change the fresh rate in Tekken 8 graphic menu
also of note this game only support borderless or windowed only.

Here are the port specs:
HDMI 2.1
USB-C 4.0 with DisplayPort 1.4

[OrigamiKingdom]

The cable was kind of my only guess but 2.1 should be good there. I've run Linux on and off, but not really up on what that looks like for 4K. The one time I tried it I didn't have any issue with the games I tried on my 4K monitor

[Dritzzka]

Tested on my 1080p Panasonic plasma and was getting weird 58 to 48fps but it reporting it was at 60hz.
Tried FSR 1.0 enabled and even tried FSR 2.0, Nothing bumped it to solid 60fps.
Shut down got into BIOS I changed the MUX switch to dedicated graphic in BIOS.
This gave me the solid 60 with TSR on mixtures of ultra and high.

I'll check again when I have access to 4KTV to see if it still does the 30hz again.

[F_F]

I got it to run at 60 fps by going to desktop mode.

[xtremeLinux]

Do note that HDMI 2.1 will not work on Linux. more information about it here https://www.phoronix.com/news/HDMI-Closed-Spec-Hurts-Open

The only way to use 4K @ 120 or 144 (Which are the ones I have tested) is using DisplayPort. I have an Nvidia 4090 at https://www.youtube.com/@xtremelinux and the lasts tests using 4K are using 144 but ONLY with DisplayPort. If I got to the HDMI Cable it falls back to 60 as the only option for 4K.

[CZI]

The the cable spec and TV spec. It's common issue.
For HDMI, you need HDMI 2.0 or above for 4K 60Hz.