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fix (the record tag is the u32 0x7461696c whose on-disk bytes are 'liat', not 'tail'); wall2_recscan.py scans them; the GR init semaphore windows identified and injected (0x4b17000->0x12a76f000 verified by content: +0xbb0=3/+0xe30=1 = the release payloads; 0x4b19000->0x122f9b000, release applied there) - releases now land on the semaphore pages; the NvOgl wait still spins (the A8 loop's per-entry counter tables are the remaining completion condition)
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recipe (0x4480000->0x125692000, 0x4ca0000->0x131649000, 0x4b16000->0x12a76a000) and the window-record layout {tag,VA,SIZE,0,tail} stride 0x40; documents the resolver7 cross-pair bug, the decoded low-VA releases and the remaining semaphore-VA translations (pending=417)
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engine init (A8 retry loop work item named NvOgl_m0; D6 submit ORs 0x200000 into the pending word) and the push windows become READABLE via the resolver6 window-record/memdesc recipe (0x4480000 -> 0x120cfb000, 0x4ca0000 -> 0x12e51e000; the service decodes the GR init streams where sessions 73-74 saw unread) - remaining gate: have_rel=0 (CE-shaped matcher) and the GR forward not engaging (forwarded=0 gr_nocap=4 drain held=4)
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(registered slot 13, EVPOST rc=0) and the completion word found/driven: the main-thread wait reads a u32 at +0x80 of a 16 KB rw-s /dev/nvidiactl notification mapping (should-wait = word != 1); a host write of 1 via the guest RAM file (PA from pagemap, file offset PA-0x80000000 above 4G) flips the wait and vkCreateDevice returns success (VKDEVICE ok family=0) - reproduced 3x (r683 manual, r684 nudger, r684d probe+single-word). Tools: t79.py (wait-chain resolver), guest_words.sh, nudge.sh; README-session77.md records the recipe, the residual guest event-dispatch gap (records consumed, notification word not written), and the -4/gdb-attach cautions.
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