Capture Cards

Capture cards are treated as another display output, same black-screen and EDID quirks apply as regular monitors, see Display Output for the general troubleshooting steps first.

AVerMedia Live Gamer Ultra (GC553)

Resolution	Status
1920x1080@60Hz	Working
1920x1080@120Hz	Black screen
2560x1440@60Hz	Working (see fix below)
2560x1440@120Hz	Black screen
3840x2160@60Hz	Black screen

Getting 1440p60 working (fixes a black screen at default settings):

1. In the capture card's own HDMI compatibility settings, remove any EDID profiles above 2K
2. Remove video=DP-1:1920x1080@60 from cmdline.txt
3. Set vram.txt to 0x80000000 (2GB)

Elgato

Results vary a lot by model and firmware version, HDCP handling in particular seems inconsistent between units.

• Elgato 4K X: works with a standard/default config for some users, black screen for others on the same model, suspected firmware version difference (worth updating the capture card's firmware if you hit issues)
• Elgato HD60X: reported showing 4K60 HDR correctly in PS5 OS, but Linux only outputs 1080p60, switching to 4K60 or enabling HDR in Linux causes a black screen. Unresolved.

HDCP

Whether the capture card needs HDCP on, off, or a dedicated HDCP stripper/splitter is inconsistent across devices and setups, some users report needing an HDCP-decrypting splitter for their capture card to pick up a signal at all, others have it working fine straight through. If you're stuck, try both HDCP states in PS5 settings and, if you have one, an HDCP stripper as a troubleshooting step.

Switching Between TV and Capture Card Without Rebooting

If you use both a TV/monitor and a capture card and want to switch between them without a full reboot, arandr (a GUI for xrandr) has worked for some users:

sudo apt install arandr

Results are mixed, some users still can't get a picture back after switching outputs and need a reboot regardless.