SUBSYSTEM!="pci", GOTO="gdm_pci_device_end"
ACTION!="bind", ACTION!="add", GOTO="gdm_pci_device_end"

# cirrus
ATTR{vendor}=="0x1013", ATTR{device}=="0x00b8", ATTR{subsystem_vendor}=="0x1af4", ATTR{subsystem_device}=="0x1100", RUN+="/usr/bin/touch /run/udev/gdm-machine-has-virtual-gpu", ENV{GDM_MACHINE_HAS_VIRTUAL_GPU}="1", GOTO="gdm_pci_device_end"
# virtio
ATTR{vendor}=="0x1af4", ATTR{device}=="0x1050", ATTR{subsystem_vendor}=="0x1af4", ATTR{subsystem_device}=="0x1100", RUN+="/usr/bin/touch /run/udev/gdm-machine-has-virtual-gpu", ENV{GDM_MACHINE_HAS_VIRTUAL_GPU}="1", GOTO="gdm_pci_device_end"
# qxl
ATTR{vendor}=="0x1b36", ATTR{device}=="0x0100", RUN+="/usr/bin/touch /run/udev/gdm-machine-has-virtual-gpu", ENV{GDM_MACHINE_HAS_VIRTUAL_GPU}="1", GOTO="gdm_pci_device_end"
# vga
ATTR{vendor}=="0x1234", ATTR{device}=="0x1111", RUN+="/usr/bin/touch /run/udev/gdm-machine-has-virtual-gpu", ENV{GDM_MACHINE_HAS_VIRTUAL_GPU}="1", GOTO="gdm_pci_device_end"

# disable Wayland on Hi1710 chipsets
ATTR{vendor}=="0x19e5", ATTR{device}=="0x1711", GOTO="gdm_disable_wayland"

# disable Wayland on Matrox chipsets
ATTR{vendor}=="0x102b", ATTR{device}=="0x0522", GOTO="gdm_disable_wayland"
ATTR{vendor}=="0x102b", ATTR{device}=="0x0524", GOTO="gdm_disable_wayland"
ATTR{vendor}=="0x102b", ATTR{device}=="0x0530", GOTO="gdm_disable_wayland"
ATTR{vendor}=="0x102b", ATTR{device}=="0x0532", GOTO="gdm_disable_wayland"
ATTR{vendor}=="0x102b", ATTR{device}=="0x0533", GOTO="gdm_disable_wayland"
ATTR{vendor}=="0x102b", ATTR{device}=="0x0534", GOTO="gdm_disable_wayland"
ATTR{vendor}=="0x102b", ATTR{device}=="0x0536", GOTO="gdm_disable_wayland"
ATTR{vendor}=="0x102b", ATTR{device}=="0x0538", GOTO="gdm_disable_wayland"

# disable Wayland on aspeed chipsets
ATTR{vendor}=="0x1a03", ATTR{device}=="0x2010", GOTO="gdm_disable_wayland"
ATTR{vendor}=="0x1a03", ATTR{device}=="0x2000", GOTO="gdm_disable_wayland"

LABEL="gdm_pci_device_end"

# disable Wayland if modesetting is disabled
KERNEL!="card[0-9]*", GOTO="gdm_nomodeset_end"
KERNEL=="card[0-9]-*", GOTO="gdm_nomodeset_end"
SUBSYSTEM!="drm", GOTO="gdm_nomodeset_end"
# but keep it enabled for simple framebuffer drivers
DRIVERS=="simple-framebuffer", GOTO="gdm_nomodeset_end"
IMPORT{parent}="GDM_MACHINE_HAS_VIRTUAL_GPU"
ENV{GDM_MACHINE_HAS_VIRTUAL_GPU}!="1", RUN+="/usr/bin/touch /run/udev/gdm-machine-has-hardware-gpu"
IMPORT{cmdline}="nomodeset", GOTO="gdm_disable_wayland"
LABEL="gdm_nomodeset_end"

# The vendor nvidia driver has multiple modules that need to be loaded before GDM can make an
# informed choice on which way to proceed, so force GDM to wait until NVidia's modules are
# loaded before starting up.
KERNEL!="nvidia", GOTO="gdm_nvidia_end"
SUBSYSTEM!="module", GOTO="gdm_nvidia_end"
ACTION!="add", GOTO="gdm_nvidia_end"
RUN+="/usr/bin/touch /run/udev/gdm-machine-has-vendor-nvidia-driver"

# Check if suspend/resume services necessary for working wayland support is available
TEST{0711}!="/usr/bin/nvidia-sleep.sh", GOTO="gdm_disable_wayland"
TEST{0711}!="/usr/lib/systemd/system-sleep/nvidia", GOTO="gdm_disable_wayland"
IMPORT{program}="/bin/sh -c \"sed -e 's/: /=/g' -e 's/\([^[:upper:]]\)\([[:upper:]]\)/\1_\2/g' -e 's/[[:lower:]]/\U&/g' -e 's/^/NVIDIA_/' /proc/driver/nvidia/params\""
ENV{NVIDIA_PRESERVE_VIDEO_MEMORY_ALLOCATIONS}!="1", GOTO="gdm_disable_wayland"
IMPORT{program}="/bin/sh -c 'echo NVIDIA_HIBERNATE=`systemctl is-enabled nvidia-hibernate`'"
ENV{NVIDIA_HIBERNATE}!="enabled", GOTO="gdm_disable_wayland"
IMPORT{program}="/bin/sh -c 'echo NVIDIA_RESUME=`systemctl is-enabled nvidia-resume`'"
ENV{NVIDIA_RESUME}!="enabled", GOTO="gdm_disable_wayland"
IMPORT{program}="/bin/sh -c 'echo NVIDIA_SUSPEND=`systemctl is-enabled nvidia-suspend`'"
ENV{NVIDIA_SUSPEND}!="enabled", GOTO="gdm_disable_wayland"
LABEL="gdm_nvidia_end"

# If this machine has an internal panel, take note, since it's probably a laptop
# FIXME: It could be "ghost connectors" make this pop positive for some workstations
# in the wild. If so, we may have to fallback to looking at the chassis type from
# dmi data or acpi
KERNEL!="card[0-9]-eDP-*", GOTO="gdm_laptop_check_end"
SUBSYSTEM!="drm", GOTO="gdm_laptop_check_end"
ACTION!="add", GOTO="gdm_laptop_check_end"
RUN+="/usr/bin/touch /run/udev/gdm-machine-is-laptop"
GOTO="gdm_hybrid_nvidia_laptop_check"
LABEL="gdm_laptop_check_end"

# If this is a hybrid graphics setup, take note
KERNEL!="card[1-9]*", GOTO="gdm_hybrid_graphics_check_end"
KERNEL=="card[1-9]-*", GOTO="gdm_hybrid_graphics_check_end"
SUBSYSTEM!="drm", GOTO="gdm_hybrid_graphics_check_end"
ACTION!="add", GOTO="gdm_hybrid_graphics_check_end"
IMPORT{program}="/bin/sh -c \"echo GDM_NUMBER_OF_GRAPHICS_CARDS=`ls -1d /sys/class/drm/card[0-9] | wc -l`\""
ENV{GDM_NUMBER_OF_GRAPHICS_CARDS}=="1", RUN+="/usr/bin/rm -f /run/udev/gdm-machine-has-hybrid-graphics"
ENV{GDM_NUMBER_OF_GRAPHICS_CARDS}!="1", RUN+="/usr/bin/touch /run/udev/gdm-machine-has-hybrid-graphics"
LABEL="gdm_hybrid_graphics_check_end"

# If this is a hybrid graphics laptop with vendor nvidia driver, disable wayland
LABEL="gdm_hybrid_nvidia_laptop_check"
TEST!="/run/udev/gdm-machine-is-laptop", GOTO="gdm_hybrid_nvidia_laptop_check_end"
TEST!="/run/udev/gdm-machine-has-hybrid-graphics", GOTO="gdm_hybrid_nvidia_laptop_check_end"
TEST!="/run/udev/gdm-machine-has-vendor-nvidia-driver", GOTO="gdm_hybrid_nvidia_laptop_check_end"
GOTO="gdm_disable_wayland"
LABEL="gdm_hybrid_nvidia_laptop_check_end"

# Disable wayland in situation where we're in a guest with a virtual gpu and host passthrough gpu
LABEL="gdm_virt_passthrough_check"
TEST!="/run/udev/gdm-machine-has-hybrid-graphics", GOTO="gdm_virt_passthrough_check_end"
TEST!="/run/udev/gdm-machine-has-virtual-gpu", GOTO="gdm_virt_passthrough_check_end"
TEST!="/run/udev/gdm-machine-has-hardware-gpu", GOTO="gdm_virt_passthrough_check_end"
GOTO="gdm_disable_wayland"
LABEL="gdm_virt_passthrough_check_end"

# Disable wayland when there are multiple virtual gpus
LABEL="gdm_virt_multi_gpu_check"
TEST!="/run/udev/gdm-machine-has-hybrid-graphics", GOTO="gdm_virt_multi_gpu_check_end"
TEST!="/run/udev/gdm-machine-has-virtual-gpu", GOTO="gdm_virt_multi_gpu_check_end"
TEST=="/run/udev/gdm-machine-has-hardware-gpu", GOTO="gdm_virt_multi_gpu_check_end"
LABEL="gdm_virt_multi_gpu_check_end"

# Disable wayland when nvidia modeset is disabled or when drivers are a lower
# version than 470,
# For versions above 470 but lower than 510 prefer Xorg,
# Above 510, prefer Wayland.
KERNEL!="nvidia_drm", GOTO="gdm_nvidia_drm_end"
SUBSYSTEM!="module", GOTO="gdm_nvidia_drm_end"
ACTION!="add", GOTO="gdm_nvidia_drm_end"
# disable wayland if nvidia-drm modeset is not enabled
ATTR{parameters/modeset}!="Y", GOTO="gdm_disable_wayland"
# disable wayland for nvidia drivers versions lower than 470
ATTR{version}=="4[0-6][0-9].*|[0-3][0-9][0-9].*|[0-9][0-9].*|[0-9].*", GOTO="gdm_disable_wayland"
# For nvidia drivers versions Above 510, keep Wayland by default
ATTR{version}=="[5-9][1-9][0-9].*", GOTO="gdm_end"
# For nvidia drivers versions 470-495, prefer Xorg by default
GOTO="gdm_prefer_xorg"
LABEL="gdm_nvidia_drm_end"

GOTO="gdm_end"

LABEL="gdm_prefer_xorg"
RUN+="@libexecdir@/gdm-runtime-config set daemon PreferredDisplayServer xorg"
GOTO="gdm_end"

LABEL="gdm_disable_wayland"
RUN+="@libexecdir@/gdm-runtime-config set daemon WaylandEnable false"
GOTO="gdm_end"

LABEL="gdm_end"