Debian Bug report logs - #1098301
Mpv hardware decoding (vo=gpu) broken on i915 after upgrading Mesa to 24.3

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Subject: Bug#1098301: Mpv hardware decoding (vo=gpu) broken on i915 after upgrading Mesa to 24.3
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Package: libglx-mesa0
Version: 24.3.4-3
Severity: normal

Debian Trixie. After upgrading the following packages

libglx-mesa0:amd64 (24.2.8-1, 24.3.4-3), libgbm1:amd64 (24.2.8-1, 24.3.4-3),
libgl1-mesa-dri:amd64 (24.2.8-1, 24.3.4-3), libegl-mesa0:amd64
(24.2.8-1, 24.3.4-3)

cannot use mpv with vo=gpu on a Nehalem Intel iGPU machine, so video
playback is terribly slow.
Bisected to mesa 24.3.0-1. Tried various additional mesa and mpv debug env vars,
but no exact issue still. Below are mpv logs from `mpv
--msg-level=all=v video.mp4`.
Maybe it is really a mpv thing. I don't get how there is [vo/gpu/drm]
part after it failed to use
OpenGL 4.5 in the broken version. There is no attempt to use OpenGL
4.5 on my ancient machine with 24.2.8-1.

Relevant part of broken mpv logs:
```
[vo/gpu/x11] Current display FPS: 60.031185
[vo/gpu/opengl] EGL_VERSION=1.5
[vo/gpu/opengl] EGL_VENDOR=Mesa Project
[vo/gpu/opengl] EGL_CLIENT_APIS=OpenGL OpenGL_ES
[vo/gpu/opengl] Trying to create Desktop OpenGL context.
[vo/gpu/opengl] Choosing visual EGL config 0xb, visual ID 0x21
[vo/gpu/x11] The XPresent extension was found.
[vo/gpu/x11] XPresent enabled.
[vo/gpu/opengl] GL_VERSION='4.5 (Core Profile) Mesa 24.3.4-3'
[vo/gpu/opengl] Detected desktop OpenGL 4.5.
[vo/gpu/opengl] GL_VENDOR='Mesa'
[vo/gpu/opengl] GL_RENDERER='llvmpipe (LLVM 19.1.7, 128 bits)'
[vo/gpu/opengl] GL_SHADING_LANGUAGE_VERSION='4.50'
[vo/gpu/opengl] Loaded extension GL_KHR_debug.
[vo/gpu/opengl] Detected suspected software renderer.
[vo/gpu/opengl] Suspected software renderer or indirect context.
[vo/gpu/opengl] Initializing GPU context 'drm'
[vo/gpu/drm] VT_GETMODE failed: Inappropriate ioctl for device
[vo/gpu/drm] Failed to set up VT switcher. Terminal switching will be
unavailable.
[vo/gpu/drm] Picked DRM card 0, primary node /dev/dri/card0 as the default.
[vo/gpu/drm] Driver: i915 1.6.0 (0)
[vo/gpu/drm] Connector 64 currently connected to encoder 65
[vo/gpu/drm] Selected Encoder 65 with CRTC 47
[vo/gpu/drm] Selected mode: 1366x768 ([email protected])
[vo/gpu/drm] DRM Atomic support found
[vo/gpu/drm] Using primary plane 32 as draw plane
[vo/gpu/drm] Using overlay plane 36 as drmprime plane
[vo/gpu] GBM_FORMAT_ARGB8888 not supported by draw plane: Falling back
to GBM_FORMAT_XRGB8888.
[vo/gpu] Supported modifier: 0x100000000000001
[vo/gpu] Supported modifier: 0x0
[vo/gpu] Creating GBM device
[vo/gpu] Initializing GBM surface (1366 x 768)
[vo/gpu/opengl] Initializing EGL
[vo/gpu/opengl] EGL_VERSION=1.5
[vo/gpu/opengl] EGL_VENDOR=Mesa Project
[vo/gpu/opengl] EGL_CLIENT_APIS=OpenGL OpenGL_ES
[vo/gpu/opengl] Trying to create Desktop OpenGL context.
[vo/gpu/opengl] Attempting to find EGLConfig matching GBM_FORMAT_XRGB8888
[vo/gpu/opengl] Found matching EGLConfig for GBM_FORMAT_XRGB8888
[vo/gpu/opengl] Initializing EGL surface
[vo/gpu] GL_VERSION='2.1 Mesa 24.3.4-3'
[vo/gpu] Detected desktop OpenGL 2.1.
[vo/gpu] GL_VENDOR='Intel'
[vo/gpu] GL_RENDERER='Mesa Intel(R) HD Graphics (ILK)'
[vo/gpu] GL_SHADING_LANGUAGE_VERSION='1.20'
[vo/gpu] Loaded extension GL_ARB_map_buffer_range.
[vo/gpu] Loaded extension GL_ARB_framebuffer_object.
[vo/gpu] Loaded extension GL_ARB_vertex_array_object.
[vo/gpu] Loaded extension GL_ARB_texture_rg.
[vo/gpu] Loaded extension GL_ARB_texture_float.
[vo/gpu] Loaded extension GL_ARB_sync.
[vo/gpu] Loaded extension GL_ARB_invalidate_subdata.
[vo/gpu] Loaded extension GL_ARB_get_program_binary.
[vo/gpu] Loaded extension GL_ARB_buffer_storage.
[vo/gpu] Loaded extension GL_ARB_arrays_of_arrays.
[vo/gpu] Loaded extension GL_ARB_debug_output.
[vo/gpu] Loaded extension GL_KHR_debug.
[vo/gpu/opengl] Preparing framebuffer
[vo/gpu/opengl] GBM surface using modifier 0x100000000000001
[vo/gpu/drm] Failed to acquire DRM master: Permission denied
[vo/gpu/drm] crtc is not VRR capable
[vo/gpu/drm] Failed to commit ModeSetting atomic request: Permission denied
[vo/gpu/opengl] Failed to set CRTC for connector 64: Permission denied
[vo/gpu] Failed to commit atomic request: Permission denied
[vo/gpu/drm] Failed to commit ModeSetting atomic request: Permission denied
[vo/gpu/drm] Failed to restore previous mode
[vo/gpu/drm] Failed to drop DRM master: Permission denied
[vo/gpu/vulkan] Initializing GPU context 'waylandvk'
[vo/gpu/libplacebo] Initialized libplacebo v7.349.0 (API v349)
[vo/gpu/libplacebo] Creating vulkan instance with extensions:
[vo/gpu/libplacebo]     VK_KHR_get_physical_device_properties2
[vo/gpu/libplacebo]     VK_KHR_portability_enumeration
[vo/gpu/libplacebo]     VK_KHR_surface
[vo/gpu/libplacebo]     VK_KHR_wayland_surface
[vo/gpu/libplacebo] Failed creating instance: VK_ERROR_INCOMPATIBLE_DRIVER
[vo/gpu/libplacebo] Failed initializing vulkan instance
[vo/gpu/vulkan] Initializing GPU context 'x11vk'
[vo/gpu/libplacebo] Initialized libplacebo v7.349.0 (API v349)
[vo/gpu/libplacebo] Creating vulkan instance with extensions:
[vo/gpu/libplacebo]     VK_KHR_get_physical_device_properties2
[vo/gpu/libplacebo]     VK_KHR_portability_enumeration
[vo/gpu/libplacebo]     VK_KHR_surface
[vo/gpu/libplacebo]     VK_KHR_xlib_surface
[vo/gpu/libplacebo] Failed creating instance: VK_ERROR_INCOMPATIBLE_DRIVER
[vo/gpu/libplacebo] Failed initializing vulkan instance
[vo/gpu/vulkan] Initializing GPU context 'displayvk'
[vo/gpu/libplacebo] Initialized libplacebo v7.349.0 (API v349)
[vo/gpu/libplacebo] Creating vulkan instance with extensions:
[vo/gpu/libplacebo]     VK_KHR_get_physical_device_properties2
[vo/gpu/libplacebo]     VK_KHR_portability_enumeration
[vo/gpu/libplacebo]     VK_KHR_surface
[vo/gpu/libplacebo]     VK_KHR_display
[vo/gpu/libplacebo] Failed creating instance: VK_ERROR_INCOMPATIBLE_DRIVER
[vo/gpu/libplacebo] Failed initializing vulkan instance
[vo/gpu] Failed initializing any suitable GPU context!
Error opening/initializing the selected video_out (--vo) device.

(tried also OpenGL 4.5, failed, but then also failed with 2.1)
```


Healthy mpv output was:
```
[vo/gpu/x11] Current display FPS: 60.031185
libEGL warning: DRI3: Screen seems not DRI3 capable
libEGL warning: failed to get driver name for fd -1

libEGL warning: MESA-LOADER: failed to retrieve device information

libEGL warning: failed to get driver name for fd -1

[vo/gpu/opengl] EGL_VERSION=1.5
[vo/gpu/opengl] EGL_VENDOR=Mesa Project
[vo/gpu/opengl] EGL_CLIENT_APIS=OpenGL OpenGL_ES
[vo/gpu/opengl] Trying to create Desktop OpenGL context.
[vo/gpu/opengl] Choosing visual EGL config 0x4, visual ID 0x21
[vo/gpu/x11] The XPresent extension was found.
[vo/gpu/x11] XPresent enabled.
[vo/gpu/opengl] GL_VERSION='2.1 Mesa 24.2.8-1 (git-c223121bd5)'
[vo/gpu/opengl] Detected desktop OpenGL 2.1.
[vo/gpu/opengl] GL_VENDOR='Intel'
[vo/gpu/opengl] GL_RENDERER='Mesa Intel(R) HD Graphics (ILK)'
[vo/gpu/opengl] GL_SHADING_LANGUAGE_VERSION='1.20'
[vo/gpu/opengl] Loaded extension GL_ARB_map_buffer_range.
[vo/gpu/opengl] Loaded extension GL_ARB_framebuffer_object.
[vo/gpu/opengl] Loaded extension GL_ARB_vertex_array_object.
[vo/gpu/opengl] Loaded extension GL_ARB_texture_rg.
[vo/gpu/opengl] Loaded extension GL_ARB_texture_float.
[vo/gpu/opengl] Loaded extension GL_ARB_sync.
[vo/gpu/opengl] Loaded extension GL_ARB_invalidate_subdata.
[vo/gpu/opengl] Loaded extension GL_ARB_get_program_binary.
[vo/gpu/opengl] Loaded extension GL_ARB_buffer_storage.
[vo/gpu/opengl] Loaded extension GL_ARB_arrays_of_arrays.
[vo/gpu/opengl] Loaded extension GL_ARB_debug_output.
[vo/gpu/opengl] Loaded extension GL_KHR_debug.
[vo/gpu] Testing FBO format rgba16f
[vo/gpu] Using FBO format rgba16f.

(and then vo=gpu with vaapi works)
```

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