marfrit
eff6fb5b29
Spun off 2026-05-03 from the closed-without-patch kwin_overlay_subsurface campaign (its phase8_handover.md is the predecessor). The candidate research question is whether running an X11 session on PineTab2 reproduces, eliminates, or transforms the drop-inversion phenomenon that motivated the predecessor — but the framing is provisional and awaits operator confirmation before Phase 1 lock. phase0_findings.md is the substrate doc: - Predecessor close-out summary (three reasons no patch landed; replicate-baseline-first lesson). - What stays valid from the predecessor (Phase 1 scanout archaeology, Phase 2-prime KWin Wayland source-read which does NOT transfer to X11, Δ_present-46ms reproducible side-finding which is directly testable under X11, measurement infrastructure with WAYLAND_DEBUG-specific parts that don't transfer). - Current ohm state (carry-over predecessor tooling, governor pin, baloo disabled, kwin-fourier still installed). - Provisional research question with three plausible outcomes (α/β/γ) and four alternate framings the operator may have in mind that this question doesn't cover. - Working-assumption out-of-scope list (no patches, no MRs, no Δ_present chase yet). - Four pre-question Phase 0 deliverables that are unblocked regardless of framing: ohm state snapshot, X11-path inventory, X11 measurement-tool inventory, A1 Wayland-baseline rep on this campaign's session for future comparison anchor. worklist.md tracks Phase 0 only. Phase 1 lock awaits the research question. Discipline carry-overs from kwin_overlay_subsurface listed (replicate baseline first; phase discipline; non-upstreaming default; memory persistence at close). README.md status banner: Phase 0 in progress, research question pending operator confirmation. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
74 lines
2.9 KiB
Markdown
74 lines
2.9 KiB
Markdown
# x11-session-research
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> **Status: PHASE 0 — research question pending operator
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> confirmation.** See [`phase0_findings.md`](phase0_findings.md)
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> § "Research question (provisional)" for the candidate framing
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> drafted from the predecessor campaign's close-out. Phase 1
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> lock will not happen before the operator confirms or
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> redirects.
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Campaign to investigate X11 session behaviour on PineTab2
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RK3568, in the context of the just-closed
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[`kwin_overlay_subsurface`](../kwin_overlay_subsurface/)
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campaign. Whether running an X11 (Xorg) session on the same
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hardware would (a) reproduce the drop-inversion phenomenon
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that motivated the predecessor, (b) bypass it entirely, or
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(c) introduce a different set of constraints, is the most
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likely campaign question — but this is a working assumption,
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not a locked goal. See `phase0_findings.md`.
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## Predecessor
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This campaign exists because
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[`../kwin_overlay_subsurface/`](../kwin_overlay_subsurface/)
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closed 2026-05-03 without patch (`phase8_handover.md`). Its
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diagnostic loop terminated at "Phase 0 cage = 0 post-warmup
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drops floor not reproducible at N=3." The natural next move
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across the design surface is to vary the display server (X11
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instead of Wayland) on the same hardware and the same client
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binary, but the operator has not yet confirmed that as the
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campaign's specific question.
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## Hardware target (provisional, same as predecessor)
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ohm — PineTab2, Rockchip RK3568 (4× Cortex-A55, Mali-G52 MP2,
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hantro G1/G2 VPU). Kernel `6.19.10-danctnix1-1-pinetab2`.
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Mesa 26.0.5. Currently runs KDE Plasma 6.6.4 Wayland.
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For an X11-session campaign, ohm needs an Xorg + Plasma X11 (or
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similar X11 desktop) install path verified. As of 2026-05-03,
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the only confirmed display path on ohm is
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`startplasma-wayland`. **Whether Plasma X11, an alternate X11
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desktop (XFCE, openbox, lightweight WM), or Plasma running
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under a Wayland-Xorg shim is in scope is part of the research
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question to be locked.**
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## Carry-overs from predecessor (still active on ohm)
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Per `kwin_overlay_subsurface/phase1_evidence/ohm_tooling_revert_log.md`:
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- `qt6-base-fourier 1:6.11.0-3` installed.
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- `kwin-fourier 1:6.6.4-3` installed.
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- CPU governor pinned to `performance` (was `conservative`).
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- Baloo permanently disabled
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(`Indexing-Enabled=false` in `~/.config/baloofilerc`).
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- `drm-info 2.9.0-1` installed.
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These were not reverted at the predecessor's close-out. This
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campaign inherits them unless an explicit revert is part of
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the design.
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## Non-upstreaming default
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Inherited from the predecessor and from `ohm_gl_fix`. Bug
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reports + MRs are explicit operator-tasked decisions, not
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background process steps.
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## File map (will grow)
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| File | What it is |
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| `README.md` | This file. |
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| `phase0_findings.md` | Substrate from the predecessor + the candidate research question. **Awaits operator confirmation/redirect on the question itself.** |
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| `worklist.md` | Phase-by-phase task list. Phase 0 only as of campaign start. |
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