drm: TTY + AMD Dual GPU (incl. laptops with iGPU + dGPU) #1469
Description
Issue Description: gamescope fails to initialize due to its DRM module not finding any connected (display) connector on a Framework 16 laptop with RX 7700S dGPU.
Expected Behavior: The eDP-1 connection should read as "connected" in the logs, and gamescope should start.
Actual Behavior: The eDP-1 connection reads as "disconnected" in the logs, and gamescope fails to start.
Command: STEAM_MULTIPLE_XWAYLANDS=1 gamescope -W 2560 -H 1600 -r 165 -e --xwayland-count 2 -- steam -gamepadui -steamdeck
[gamescope] [Info] console: gamescope version 3.14.29-9-g94271f31
[gamescope] [Info] vulkan: selecting physical device 'AMD Radeon RX 7700S (RADV NAVI33)': queue family 1 (general queue family 0)
[gamescope] [Info] vulkan: physical device supports DRM format modifiers
[gamescope] [Info] wlserver: [backend/headless/backend.c:67] Creating headless backend
[gamescope] [Info] wlserver: [libseat] [libseat/backend/seatd.c:64] Could not connect to socket /run/seatd.sock: No such file or directory
[gamescope] [Info] wlserver: [libseat] [libseat/libseat.c:76] Backend 'seatd' failed to open seat, skipping
[gamescope] [Info] wlserver: [libseat] [libseat/libseat.c:73] Seat opened with backend 'logind'
[gamescope] [Info] wlserver: [backend/session/session.c:108] Successfully loaded libseat session
[gamescope] [Info] drm: opening DRM node '/dev/dri/card1'
[gamescope] [Info] drm: Connectors:
[gamescope] [Info] drm: DP-1 (disconnected)
[gamescope] [Info] drm: eDP-1 (disconnected)
[gamescope] [Info] drm: cannot find any connected connector!
[gamescope] [Error] drm: Failed to find a primary plane
Failed to create backend.
Possibly related to: #1125