3 Commits

Author	SHA1	Message	Date
marfrit	93d7c5c67a	KWIN_PIVOT: Phase-4 done (qt6 patches landed) + weston A/B vindicates KWin theory ... Today's deltas: - qt6-base-fourier built, installed, validated on ohm. Static-idle journal shows zero GL_INVALID_VALUE post-relogin; the Qt 6 GL_ALPHA bug is genuinely fixed. - chrome v4 under KWin still stalls — at ~6s vs ~3s pre-Qt-fix, so the GL_ALPHA churn was contributing some load but wasn't the primary cause. - Clean A/B with weston: same chrome v4 binary, same panfrost, same V4L2, same hardware → swapping KWin → weston turns the stall off entirely. Chrome plays through with elevated CPU (~96 % vs KWin's ~50 % when it isn't stalled) because weston falls back to LINEAR composite vs KWin's fast-tile path. - mpv triangulation: --vo=null --hwdec=v4l2request: clean (decode only) --vo=drm --hwdec=v4l2request: 0.7 % drops in 19 s (KMS scanout) --vo=gpu-next --hwdec=v4l2request under KWin: 76 % drops, slideshow Decode + display hardware path is fully capable. The wall is specifically KWin's compositor scheduling/presentation pipeline on this stack — panfrost ES 3.2 + V4L2 stateless NV12 dmabuf clients. KWIN_PIVOT.md rewritten: - Phase 4 (qt6 patch, ship, upstream) marked done. - New Phase 5 (find the KWin culprit): WAYLAND_DEBUG on chrome + KWin to capture the missing wl_buffer.release / wp_presentation exchange around the 6 s stall, plus strace-on-kwin and effects-disable bisection. - New Phase 6 (fix and ship): kwin-fourier package pattern, ohm validation, bugs.kde.org filing.	2026-04-28 15:35:01 +00:00
marfrit	cd25d02e01	KWIN_PIVOT: Phase-2 findings — bug is in Qt 6, not KWin ... Source-grep collapsed Phase 1+2 onto a single pass. KWin's own GL paths use GL_R8 correctly (gltexture.cpp:61, shadowitem.cpp:494). The glTexImage2D(GL_ALPHA) calls observed in the journal originate from Qt 6: - qtbase/src/opengl/qopengltextureglyphcache.cpp:111-117 — text glyph cache upload path. The #else branch (active when qtbase is built with QT_CONFIG(opengles2)) unconditionally uses GL_ALPHA, with no runtime check for ES context major version. Correct on ES 2.x; broken on ES 3.x where GL_ALPHA is no longer a valid glTexImage2D internalFormat. - qtbase/src/gui/rhi/qrhigles2.cpp:1373-1378 — Qt-Quick-RHI sibling. Same logic, gated only on caps.coreProfile, missing the ES≥3 case. - qtbase/src/opengl/qopengltextureuploader.cpp:253-257 — QImage→GL upload path; same shape. KWin runs an ES 3.2 context on Mali-G52 panfrost (RK3566), Qt picks GL_ALPHA, mesa returns GL_INVALID_VALUE, every dependent draw errors at level 0, the compositor's frame-callback path stalls. KWin is the visible victim because it's the compositor, but the bug is in Qt. KWIN_PIVOT.md rewritten: the patch series and packaging now target qt6-base-fourier instead of kwin-fourier. Three small hunks (~3 lines each), runtime-safe via existing caps.gles + caps.ctxMajor / surface format majorVersion checks. Upstream landing path: bugreports.qt.io + Gerrit change against qtbase dev branch.	2026-04-28 12:18:25 +00:00
marfrit	8756ce38be	chromium-fourier r2 + firefox-fourier 150.0.1 + KWIN_PIVOT.md ... chromium-fourier: - patch 3/3 nv12-external-oes-on-modifier-external-only.patch — adds NativePixmapEGLBinding::ModifierRequiresExternalOES helper, extends OzoneImageGLTexturesHolder::GetBinding to honor EGL external_only flag for NV12 dmabufs on panfrost / panthor. Validated on ohm (RK3566 hantro mainline 6.19.10): bbb_1080p30_h264.mp4 plays at 34.7 % combined CPU vs ~131 % pre-patch baseline (~3.8x). - PKGBUILD pkgrel 1->2, source array + sha256sums + prepare() hook for patch 4, patch numbering 1/2,2/2 -> 1/3,2/3,3/3. - NEXT.md appended with 2026-04-28 section: patch 4 design, validation log, KWin GL_ALPHA bug pinpoint (preexisting since 2026-03-06, affects every wayland video client; unrelated to chromium-fourier), device-renumbering note (/dev/video1 = encoder post-reboot). - KWIN_PIVOT.md: 4-phase plan to identify and patch KWin's glTexImage2D(internalFormat=GL_ALPHA) site, ohm-only test plan, scope discipline. - patches/ now tracked (compiler-rt-adjust-paths, enable-v4l2, wayland-allow-direct-egl-gles2, nv12-external-oes); the dead-end chromeos-pipeline-bypass.patch removed. firefox-fourier: - 4 patches (gfxinfo v4l2 stateless fourccs, libwrapper hwdevice ctx, ffmpegvideo v4l2-request route, prefs v4l2-request default). - PKGBUILD bumped to firefox 150.0.1, Arch toolchain glue patches layered in, mozconfig with --without-wasm-sandboxed-libraries for ALARM, package() launcher fix (rm -f symlink before cat > to avoid ENOENT through the dangling /usr/local symlink mach install drops). - 150.0.1-1-aarch64.pkg.tar.zst built on boltzmann (95 MB), pending fresnel power-on for V4L2 stateless validation on RK3399.	2026-04-28 12:02:18 +00:00