alan
6f7f7ddd6c
The bar turned green after 2 s on a timer even when the microphone delivered nothing. It now turns green only on real audio: RMS above 0.0005, or three consecutive chunks that are not digital silence (the virtual mic emits one stray nonzero chunk right after start, and a Bluetooth headset's floor ramps in from a few LSB). Measured 1.2-1.4 s after the key, within 0.14 s of the first real samples. diagnostics/bluetooth/ records how startup went from ~1.6 s (or never) to ~1.1-1.4 s: a btusb driver bug, two PipeWire bluez5 bugs, a 500 ms WirePlumber switch timeout and an over-broad auto-connect rule. Those fixes are machine level and live outside this repo; the patches, tools and measurements are here. STARTUP-TIME.md is the summary and explains the ~0.9 s hardware floor. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Xoc9DJCViR7dg9eKzzAcfQ
39 lines
2.3 KiB
Bash
Executable File
39 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
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# Install (or with "off": remove) the tracefs kprobes and dynamic-debug prints used to trace
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# Bluetooth SCO setup through the kernel and btusb. Needs passwordless sudo.
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S=/sys/kernel/tracing
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if [ "${1:-}" = off ]; then
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sudo -n sh -c "echo 0 > $S/events/bt/enable; echo > $S/kprobe_events; echo > $S/trace
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echo 'module btusb -p' > /sys/kernel/debug/dynamic_debug/control
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echo 'func hci_sync_conn_complete_evt -p' > /sys/kernel/debug/dynamic_debug/control"
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exit
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fi
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sudo -n sh -c "
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echo 0 > $S/events/bt/enable 2>/dev/null
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echo > $S/kprobe_events
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echo 'p:bt/notify btusb_notify evt=\$arg2:u32' >> $S/kprobe_events
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echo 'p:bt/work btusb_work' >> $S/kprobe_events
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echo 'p:bt/switch_alt btusb_switch_alt_setting new_alts=\$arg2:s32' >> $S/kprobe_events
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echo 'r:bt/switch_alt_ret btusb_switch_alt_setting ret=\$retval:s32' >> $S/kprobe_events
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echo 'p:bt/set_intf usb_set_interface ifnum=\$arg2:s32 alt=\$arg3:s32' >> $S/kprobe_events
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echo 'r:bt/set_intf_ret usb_set_interface ret=\$retval:s32' >> $S/kprobe_events
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echo 'r:bt/submit_isoc_ret btusb_submit_isoc_urb ret=\$retval:s32' >> $S/kprobe_events
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echo 'r:bt/autopm_ret usb_autopm_get_interface ret=\$retval:s32' >> $S/kprobe_events
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echo 'p:bt/conn_add hci_conn_add_unset type=\$arg2:s32' >> $S/kprobe_events
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echo 'p:bt/conn_del hci_conn_del' >> $S/kprobe_events
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echo 'p:bt/conn_failed hci_conn_failed status=\$arg2:u8' >> $S/kprobe_events
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echo 'p:bt/conn_complete hci_conn_complete_evt status=+0(\$arg2):u8 link_type=+9(\$arg2):u8' >> $S/kprobe_events
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echo 'p:bt/disconn_complete hci_disconn_complete_evt status=+0(\$arg2):u8 handle=+1(\$arg2):u16 reason=+3(\$arg2):u8' >> $S/kprobe_events
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echo 'p:bt/mode_change hci_mode_change_evt status=+0(\$arg2):u8' >> $S/kprobe_events
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echo 'p:bt/sco_setup hci_sco_setup status=\$arg2:u8' >> $S/kprobe_events
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echo 'p:bt/cs_enh_setup_sync hci_cs_enhanced_setup_sync_conn status=\$arg2:u8' >> $S/kprobe_events
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echo 'p:bt/sync_complete hci_sync_conn_complete_evt' >> $S/kprobe_events
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echo 'p:bt/connect_cfm sco_connect_cfm status=\$arg2:u8' >> $S/kprobe_events
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echo 'p:bt/sco_tx hci_send_sco' >> $S/kprobe_events
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echo 'p:bt/sco_rx_urb btusb_isoc_complete' >> $S/kprobe_events
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echo 1 > $S/events/bt/enable
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echo 'module btusb +pf' > /sys/kernel/debug/dynamic_debug/control
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echo 'func hci_sync_conn_complete_evt +pf' > /sys/kernel/debug/dynamic_debug/control
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echo > $S/trace
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echo 1 > $S/tracing_on"
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