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Using vc4-kms-v3dXorg-3d works without problems on the RPi4:
Xorg-3d works without problems on the RPi4: Code: [Select]glxinfo | grep Acc Accelerated: yesinxi -bSystem: Host: boxrpi4_32 Kernel: 6.6.34-piCore-v8 arch: aarch64 bits: 64 Desktop: FLWM v: N/A Distro: piCore 15.0Machine: Type: ARM System: Raspberry Pi 4 Model B Rev 1.2 details: N/A rev: c03112 serial: 100000002f7ed527CPU: Info: quad core Model N/A [MCP] speed (MHz): avg: 1000 min/max: 600/1500Graphics: Device-1: bcm2711-hdmi0 driver: vc4_hdmi v: N/A Device-2: bcm2711-hdmi1 driver: vc4_hdmi v: N/A Device-3: bcm2711-vc5 driver: vc4_drm v: N/A Display: server: X.org driver: X: loaded: modesetting dri: vc4 gpu: vc4-drm,vc4_crtc,vc4_dpi,vc4_dsi,vc4_firmware_kms,vc4_hdmi,vc4_hvs,vc4_txp,vc4_v3d,vc4_vec resolution: <missing: xdpyinfo/xrandr> resolution: 3840x2160 API: OpenGL v: 3.1 vendor: broadcom mesa v: 24.1.4 renderer: V3D 4.2.14..and gtk4-widget-factory is noticeably quicker.
glxinfo | grep Acc Accelerated: yesinxi -bSystem: Host: boxrpi4_32 Kernel: 6.6.34-piCore-v8 arch: aarch64 bits: 64 Desktop: FLWM v: N/A Distro: piCore 15.0Machine: Type: ARM System: Raspberry Pi 4 Model B Rev 1.2 details: N/A rev: c03112 serial: 100000002f7ed527CPU: Info: quad core Model N/A [MCP] speed (MHz): avg: 1000 min/max: 600/1500Graphics: Device-1: bcm2711-hdmi0 driver: vc4_hdmi v: N/A Device-2: bcm2711-hdmi1 driver: vc4_hdmi v: N/A Device-3: bcm2711-vc5 driver: vc4_drm v: N/A Display: server: X.org driver: X: loaded: modesetting dri: vc4 gpu: vc4-drm,vc4_crtc,vc4_dpi,vc4_dsi,vc4_firmware_kms,vc4_hdmi,vc4_hvs,vc4_txp,vc4_v3d,vc4_vec resolution: <missing: xdpyinfo/xrandr> resolution: 3840x2160 API: OpenGL v: 3.1 vendor: broadcom mesa v: 24.1.4 renderer: V3D 4.2.14
from my experience firmware v4-fkms is more likely to work without issues (for example vc4-kms-v3d doesn't work correctly in most cases with pi3b+ and dsi screen that I have)
I never had any problems with vc4-kms-v3d up to and including 14.x…
I suspect there’s a problem with the vc4 kernel driver on RPi3 in 15.x, but can’t figure out how to isolate it.