iter10 of the panvk-bifrost campaign. Eliminates the cosmetic
'--disable-gpu-sandbox' warning at brave-vulkan launch + pins the
Mesa tarball hash + makes the Vulkan ICD selection deterministic
across filesystems.
PKGBUILD changes (pkgrel: 1 -> 2):
- install ICD JSON at /usr/share/vulkan/icd.d/00-panvk-bifrost.json
(was: /usr/lib/panvk-bifrost/icd.json — required VK_ICD_FILENAMES,
which the GPU sandbox would strip, forcing --disable-gpu-sandbox)
- libvulkan_panfrost.so install path unchanged at /usr/lib/panvk-bifrost/
- sha256sums[0] pinned to 1d3c3b8a8363b8cc354175bb4a684ad8b035211cc1d6fa17aeb9b9623c513f89
(mesa-26.0.6.tar.xz from archive.mesa3d.org); patches + brave-vulkan +
icd.json remain SKIP since they're in-tree (git-tracked)
brave-vulkan changes:
- dropped --no-sandbox + --disable-gpu-sandbox: env vars MESA_VK_VERSION_OVERRIDE
and PAN_I_WANT_A_BROKEN_VULKAN_DRIVER survive the GPU sandbox boundary
(Mesa loader reads them pre-seccomp-lockdown)
- dropped VK_ICD_FILENAMES (loader auto-picks via icd.d/ directory scan)
- added VK_LOADER_DRIVERS_SELECT='00-panvk-bifrost*' for deterministic
ICD selection — Vulkan loader's readdir order is implementation-defined
per Khronos LoaderDriverInterface, so the '00-' filename prefix is
not spec-backed (ext4 happens to give insertion-order, other filesystems
may not). VK_LOADER_DRIVERS_SELECT short-circuits readdir ambiguity.
(Phase 5 review hardening.)
Test result on ohm (pre-push validation):
- brave-vulkan launches Brave without sandbox bypass
- seccomp-bpf sandboxes activate normally for utility/renderer processes
- 'panvk is not a conformant Vulkan implementation' fires ONCE (loader-select
excluded stock ICD from enumeration — only patched driver loads)
- GPU process boots, no 'Exiting GPU process' error
- Brave runs through full test timeout cleanly
README updated to reflect the new install layout + simplified wrapper.
Campaign artifacts: ~/src/panvk-bifrost/{phase0_findings_iter10.md,
phase8_iteration9_close.md (which iter10 polishes)}.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
marfrit
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