I am running Bazzite 40 on a system with an RTX 4080. Up until yesterday, I was connecting computer -> Samsung HW-Q900C soundbar -> Samsung Q90C TV. I learned that the soundbar doesn't have HDMI 2.1 ports which is why I hadn't been able to get 120Hz, so I changed my setup to computer -> TV + soundbar -> TV (eARC).
Now, I do have 120Hz, but I lost a bunch of other options in my display settings, including HDR. The only options I can set there now are resolution, orientation, refresh rate, and scale. I suspect this is an issue with the TV communicating its capabilities in a way the OS doesn't understand, but I'm not sure how to fix or work around it. Can anyone suggest a fix? Is there a setting I can change on the TV or maybe an app I can run on the computer to manually set the TV's capabilities?
Update: Just discovered kscreen-doctor. Here's the output:
Output: 445 HDMI-0
enabled
connected
priority 1
HDMI
Modes: 446:3840x2160@60! 447:4096x2160@120 448:4096x2160@100 449:4096x2160@60 450:4096x2160@50 451:4096x2160@30 452:4096x2160@24 453:4096x2160@24 454:3840x2160@144 455:3840x2160@120* 456:3840x2160@100 457:3840x2160@60 458:3840x2160@50 459:3840x2160@30 460:3840x2160@25 461:3840x2160@24 462:3840x1600@144 463:3840x1600@120 464:3840x1600@60 465:3840x1080@144 466:3840x1080@120 467:3840x1080@60 468:2560x1440@120 469:2560x1080@144 470:2560x1080@120 471:2560x1080@60 472:1920x1080@144 473:1920x1080@120 474:1920x1080@100 475:1920x1080@60 476:1920x1080@60 477:1920x1080@50 478:1920x1080@30 479:1920x1080@25 480:1920x1080@24 481:1680x1050@60 482:1600x900@60 483:1440x900@60 484:1280x1024@75 485:1280x1024@60 486:1280x800@60 487:1280x720@60 488:1280x720@60 489:1280x720@50 490:1152x864@75 491:1024x768@75 492:1024x768@70 493:1024x768@60 494:800x600@75 495:800x600@72 496:800x600@60 497:720x576@50 498:720x480@60 499:640x480@75 500:640x480@73 501:640x480@60
Geometry: 0,0 3840x2160
Scale: 1
Rotation: 1
Overscan: 0
Vrr: incapable
RgbRange: unknown
HDR: incapable
Wide Color Gamut: incapable
ICC profile: incapable
Color profile source: incapable
SOLUTION: Turns out this was my goof. I was trying to set up auto-login on my user account. In doing so, I set it to automatically log in to Plasma (X11) instead of Plasma (Wayland). Odd that the default option in that dropdown is not the one you’re currently using, but 🤷♂️.
What I’m now trying to figure out is why I can’t set auto-login for Plasma (Wayland). The Apply button is disabled. 🤔
Thanks to everyone who shared ideas.