No HDR option in Bazzite/KDE after connecting computer directly to display
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:
<span style="color:#323232;">Output: 445 HDMI-0
</span><span style="color:#323232;"> enabled
</span><span style="color:#323232;"> connected
</span><span style="color:#323232;"> priority 1
</span><span style="color:#323232;"> HDMI
</span><span style="color:#323232;"> 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
</span><span style="color:#323232;"> Geometry: 0,0 3840x2160
</span><span style="color:#323232;"> Scale: 1
</span><span style="color:#323232;"> Rotation: 1
</span><span style="color:#323232;"> Overscan: 0
</span><span style="color:#323232;"> Vrr: incapable
</span><span style="color:#323232;"> RgbRange: unknown
</span><span style="color:#323232;"> HDR: incapable
</span><span style="color:#323232;"> Wide Color Gamut: incapable
</span><span style="color:#323232;"> ICC profile: incapable
</span><span style="color:#323232;"> Color profile source: incapable
</span>