Nvidia 570 "Failed to initialize EGL" and broken VRR

[Mithras]

After installing 570 cosmic-greeter shows 3 of these before starting:

2025-02-01T11:25:15.386162Z 14165661 session-6.scope cosmic-comp[1281] ERROR [EGL] 0x3003 (BAD_ALLOC) eglQueryDevicesEXT: EGL_BAD_ALLOC error: In eglQueryDevicesEXT: Failed to allocate device list.                        │
│2025-02-01T11:25:15.386299Z 14165797 session-6.scope cosmic-comp[1281] ERROR [EGL] 0x3001 (NOT_INITIALIZED) eglInitialize: DRI2: gbm device using incorrect/incompatible backend                                             │
│2025-02-01T11:25:15.386338Z 14165837 session-6.scope cosmic-comp[1281] ERROR [EGL] 0x3001 (NOT_INITIALIZED) eglInitialize: DRI2: gbm device using incorrect/incompatible backend                                             │
│2025-02-01T11:25:15.386384Z 14165882 session-6.scope cosmic-comp[1281] ERROR [EGL] 0x3001 (NOT_INITIALIZED) eglInitialize: DRI2: gbm device using incorrect/incompatible backend                                             │
│2025-02-01T11:25:15.386397Z 14165895 session-6.scope cosmic-comp[1281] ERROR [EGL] 0x3001 (NOT_INITIALIZED) eglInitialize: eglInitialize                                                                                     │
│2025-02-01T11:25:15.386449Z 14165948 session-6.scope cosmic-comp[1281] ERROR Failed to restore previous state. Error: Invalid argument (os error 22)                                                                         │
│2025-02-01T11:25:15.386474Z 14165972 session-6.scope cosmic-comp[1281] WARNING Failed to add device /dev/dri/card0: Failed to create EGLDisplay for device: Some("/dev/dri/card0")                                           │
│                                                                                                                                                                                                                             │
│Caused by:                                                                                                                                                                                                                   │
│    0: Failed to initialize EGL. Err: EGL is not initialized, or could not be initialized, for the specified EGL display connection.                                                                                         │
│    1: EGL is not initialized, or could not be initialized, for the specified EGL display connection.           

cosmic intelf only starts if VRR is disabled. If I try to enable VRR the screen just turns off. After screen is off, I can still ssh and/or switch tty and ctrl+alt+del to reboot. After enabling VRR the only way to get back to the desktop is to delete ~/.local/state/cosmic-comp/outputs.ron.
Aside from the errors above and broken VRR the system seems to be working fine.

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[Mithras]

So far I've tried:

• Disabling/Enabling iGPU in UEFI
• Disabling/Enabling GSP
• Adding/Removing initcall_blacklist=simpledrm_platform_driver_init

No luck.

[Mithras]

It's likely a Nvidia driver regression https://forums.developer.nvidia.com/t/570-86-16-linux-driver-breaks-hdmi-output-when-adaptive-sync-is-enabled/322210