Files
punktfunk/crates/pf-client-core
enricobuehlerandClaude Fable 5 46b7ffc001 fix(client): Linux auto decoder tries VAAPI before FFmpeg-Vulkan on desktop Mesa
Mesa now exposes Vulkan Video decode queues by default (and the session
binary opts RADV in for the Deck's sake), which silently moved every desktop
AMD/Intel box onto FFmpeg-Vulkan-on-Mesa under `auto` — user-reported
(CachyOS/KDE) to judder or error-streak into the software demotion while an
explicit VAAPI pick streams perfectly. Auto's hardware order is now
device-aware (`VulkanDecodeDevice::prefer_vulkan_over_vaapi`, fed
vendor id + device name by the presenter): Vulkan-first stays only where it
is the established right answer — NVIDIA (no usable VAAPI) and the Deck's
VanGogh (VAAPI dmabuf import chroma-fringes) — and everything else gets the
battle-tested zero-copy VAAPI first, with Vulkan as its fallback.

A mid-session Vulkan failure streak now also demotes to VAAPI before
software, so a broken Mesa Vulkan path can never strand a box with a
perfectly good VAAPI driver on CPU decode.

The GTK shell's decoder setting gains the missing "Vulkan Video" option
(values now mirror the console UI's auto/vulkan/vaapi/software) and drops
its pre-Vulkan "Automatic (VAAPI → software)" label.

Verified on the RTX 5070 Ti box (loopback session, auto → "Vulkan Video
hardware decode active", 60 fps); policy locked by unit test; clippy -D
warnings + pf-client-core/pf-presenter tests green on Linux.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-14 19:41:37 +02:00
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