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KeWaitForSingleObject is kHighFrequency, so it is silent unless --log_high_frequency_kernel_calls=true - which confirms the corpus's earlier "kHighFrequency waits are simply unlogged" note. With the flag the calls do appear (1944 lines in 40 s), but the emulator slows so far that after SEVENTEEN minutes the screen was still black and skip_intro had not seen even the intro movie, with 175 MB of log written. A 2400 s boot budget did not help; the boot was not going to finish. Recorded with the numbers so nobody pays them twice, along with the two cheaper routes: a targeted Canary log line that fires only after a wait has timed out N times on the same thread (self-selecting, free on a healthy run, one small patch plus a build that is already configured), or digging the PPCContext out of a stack frame under gdb - possible but fragile, since the Release binary has symtab only and no DWARF. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01PMRJjbxLqZtsb5Vb7KunPE