## System details

- **CPU:** 13th Gen Intel (Raptor Lake-P)
- **GPU (integrated):** Intel Iris Xe Graphics (RPL-P)
- **GPU (discrete):** NVIDIA GeForce RTX 3050 6GB Laptop GPU
- **Drivers:** nvidia-open-dkms 590.48.01, Mesa 26.0.1, intel-media-driver 25.3.4
- **Omarchy:** 3.4.1
- **Kernel:** 6.18.13-arch1-1
- **Chromium:** 145.0.7632.116

## Problem

On hybrid Intel+NVIDIA laptops, Chromium's hardware acceleration is broken out of the box. Enabling "Use hardware acceleration when available" in Chromium settings causes **black screen, flickering, and visual corruption**. This forces users to disable hardware acceleration entirely, losing VAAPI video decode and GPU rasterization.

The root cause is a **cross-GPU DMA-BUF incompatibility**: Hyprland's compositor runs on the NVIDIA GPU, while Chromium renders via the Intel GPU through ANGLE/OpenGL. When Chromium's GPU compositor tries to import NVIDIA DMA-BUF buffers as EGLImages on the Intel GPU, it fails with `EGL_BAD_MATCH (0x3009)`, producing hundreds of errors per second:

```
eglCreateImage failed with 0x00003009
OzoneImageBacking::ProduceSkiaGanesh failed to create GL representation
SharedImageManager::ProduceSkia: Trying to produce a Skia representation from an incompatible backing: OzoneImageBacking
```

This is the same issue reported in #3899 (same hardware: 13th Gen Intel + RTX 3050).

## Investigation & what we tried

### 1. Set `LIBVA_DRIVER_NAME=iHD` in `~/.config/hypr/envs.conf`
**Result: Partially successful.** Without this, `vainfo` defaults to NVIDIA's NVDEC driver which has limited VAAPI support. With `iHD`, Intel's full VAAPI stack activates (60+ profiles including H264, VP9, HEVC, AV1 encode/decode).

### 2. Added VA-API flags to `chromium-flags.conf` (as proposed in #4773)
```
--enable-features=VaapiVideoDecodeLinuxGL,VaapiVideoEncoder
--enable-gpu-rasterization
--enable-zero-copy
--ignore-gpu-blocklist
```
**Result: Partially successful.** `chrome://gpu` showed "Video Decode: Hardware accelerated" and `chrome://media-internals` confirmed `VaapiVideoDecoder` was being used. However, the `eglCreateImage` errors persisted, causing **black screen and flickering**.

### 3. Tried `--use-angle=vulkan` with Vulkan features
```
--use-angle=vulkan
--enable-features=Vulkan,DefaultANGLEVulkan
```
**Result: Failed.** Chromium window became completely transparent/invisible. ANGLE Vulkan cannot render at all on this hybrid setup.

### 4. Added `--disable-gpu-compositing` (working solution)
```
--disable-gpu-compositing
```
**Result: Working workaround.** This disables only the GPU compositor (the part that does cross-GPU buffer sharing), while keeping:
- ✅ VAAPI video decode (hardware) - H264, VP8, VP9, HEVC, AV1
- ✅ GPU rasterization (hardware)
- ✅ Canvas (hardware)
- ✅ WebGL/WebGPU (hardware, at reduced performance)
- ❌ GPU compositing (software - scrolling/CSS animations use CPU)

## Working configuration

### `~/.config/hypr/envs.conf`
```
env = LIBVA_DRIVER_NAME,iHD
```

### `~/.config/chromium-flags.conf`
```
--enable-features=VaapiVideoDecodeLinuxGL,VaapiVideoEncoder
--enable-gpu-rasterization
--enable-zero-copy
--ignore-gpu-blocklist
--disable-gpu-compositing
```

## Proposal

For hybrid Intel+NVIDIA systems, Omarchy could:

1. **Auto-detect hybrid GPU setups** and set `LIBVA_DRIVER_NAME=iHD` in the environment (needed for Intel VAAPI to work when NVIDIA is present)
2. **Include VA-API flags by default** in `chromium-flags.conf` (as proposed in #4773)
3. **Auto-add `--disable-gpu-compositing`** for hybrid Intel+NVIDIA systems to prevent the cross-GPU `eglCreateImage` errors

This would make Chromium usable with hardware acceleration out of the box on hybrid laptops, instead of forcing users to either disable HW acceleration entirely or manually figure out the workaround.

## Related issues

- #4773 — Enable VA-API hardware acceleration in default Chromium flags
- #3899 — Chromium GPU/Ozone errors after update to 3.2.3 (same hardware, same errors)
- #2964 — Chromium crashes when hardware acceleration is enabled
- #2800 — google-chrome flickers
- #3891 — Videos not playing after recent update