The Medium (PPSA03718): PlayGo OOM fixed, New Game shows a black frame

[edubox]

Title: The Medium (PPSA03718, 01.007)

Dump: app0 with no sce_sys/playgo-chunk.dat or playgo-scenario.json. medium/content/paks has pakchunk0-ps5.pak, pakchunk1-ps5.pak and pakchunk0optional-ps5.pak.

Current state on main (9ae2f7d22a, Linux, RTX 4080 SUPER):

• APS5_PLAYGO_UNLISTED_CHUNKS=installed: the title walks chunk ids with scePlayGoGetLocus and never stops (8M calls, ids above 28,000), UE4 reserves 5,565,054,976 bytes and aborts with PS5 Out of Memory.
• APS5_PLAYGO_UNLISTED_CHUNKS=absent: title screen and main menu work (about 60 FPS title, 30 FPS menu), but New Game stays on a black frame.
• With the local branch feat/playgo-unlisted-chunk-list and APS5_PLAYGO_UNLISTED_CHUNKS=0,1, the walk stops at chunk 2 and the OOM is gone. New Game writes its save (_sd_mem/u268435456/slot0.bin) and runs at about 27 FPS. It then hits a compute V# TYPE 2 (buffer descriptor uses an unsupported type); with the TYPE 2 change from fix(shader): drop vector stores through TYPE 2/3 and FORMAT 0 buffer V#s as measured #10831 the run lasted 240 s without a crash, but the frame stayed almost black (mean luminance about 2.5/255).

Open items:

• Level loading: the medium/content/paks/*.pak files are never opened (atime unchanged), so New Game may still be waiting for level data.
• TYPE 2 buffer V# in a compute shader (tracked in fix(shader): drop vector stores through TYPE 2/3 and FORMAT 0 buffer V#s as measured #10831).
• Re-check the first scene once both are fixed.

Local changes / PRs: feat(playgo): accept a chunk id list for dumps without metadata (PR to be linked).

[edubox]

PR: #11899 feat(playgo): accept a chunk id list for dumps without metadata (adds APS5_PLAYGO_UNLISTED_CHUNKS=0,1).