wall-2 session-83: the A8 completion counter decoded to a client readback window - a82f30 -> *(obj+0x19b8)=eglcore+0xb250f0 -> b1bf00 (slow path obj+0x224==0) -> b27c90 reads *(u32*)(*(*(obj+0x1480)+0x58)+idx*16) (idx 0xbb.., min over n=*(u32*)(obj+0x22efc)); the window for handle 0xbeec0100 is VA 0x7827e6c12000 (/dev/nvidiactl) and the host CAN write it via the RAM file: writing 0x100 made the client read it (obj+0x1070=0x100, actual table entry 0xffffffff00000100) - first live proof the counter can be driven from the host; the wait persists in the loop's second scan (a85ec1/b29dc0) and the *(rsp+0x38) branch

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