Linux

10264 readers

746 users here now

A community for everything relating to the GNU/Linux operating system (except the memes!)

Also, check out:

Original icon base courtesy of lewing@isc.tamu.edu and The GIMP

founded 2 years ago

MODERATORS

Ategon@programming.dev

anzo@programming.dev

dwraf_of_ignorance@programming.dev

Unable to set 4k120Hz via Cable Matters DP->HDMI 2.1 converter (linux.community)

submitted 2 days ago by mat@linux.community to c/linux@programming.dev

7 comments fedilink hide all child comments

I recently purchased a LG OLED C2 TV, which supports 4k120Hz but only has HDMI 2.1 ports. I am aware of HDMI 2.1 being an issue on AMD, even though my GPU is Nvidia (RTX 3060Ti) I want to switch to AMD in the future, so I opted to invest in an AMD-friendly setup. I purchased the Cable Matters active DisplayPort -> HDMI 2.1 converter mentioned in this Reddit thread, which purportedly can do 4k120. However, when I change it from the default 4k60 modeline to 4k120, the TV shows a "no signal" message. In fact, to get 120Hz I need to drop the resolution down to 1440p.

Even though I'm not going for VRR (yet), I also tried flashing the VRR-enabled "Spyder" firmware just in case it fixes the refresh rate (it does not). I tested every DP port on the 3060Ti as well, with no changes. What might I be doing wrong?

you are viewing a single comment's thread
view the rest of the comments

[–] Lemmchen@feddit.org 2 points 2 days ago (1 children)

Can you elaborate on why HDMI 2.1 is supposed to be problematic on AMD?

[–] Viirax@piefed.social 8 points 2 days ago

HDMI Forum blocking the implementation of HDMI 2.1 in open source drivers. Really sucks for people who want to use their systems connected to TVs.