When tuning some of the performance and power settings, I tried enabling the C3 state as the "lowest" economy power setting. This works all well and good, *unless* I suspend while on battery after some period of idle activity /etc/rc.conf ----8<----8<----8<--- # Performance and power tuning taken from TuningPowerconsumption wiki performance_cx_lowest="C2" economy_cx_lowest="C3" ----8<----8<----8<--- /boot/loader.conf ----8<----8<----8<--- # Performance and power tuning taken from TuningPowerConsumption wiki ##################################################################### # Disable PCI bus devices we don't have something built into the kernel # for. hw.pci.do_power_nodriver=3 # Disable throttling that would be hidden by the C2 state hint.p4tcc.0.disabled=1 hint.acpi_throttle.0.disabled=1 # Enable clocks to make the C3 state viable hint.apic.0.clock=0 hint.atrtc.0.clock=0 # Reduce the interrupt rate to make C3 more effective kern.hz=100 ----8<----8<----8<--- How-To-Repeat: * Enable the C3 state. * Suspend while on battery, typically after some period of inactivity, allowing the machine to enter C3 * Attempt to resume Observe the black screen on resume followed by a reboot a short time after that.
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