Version: > FreeBSD xxx 12.0-CURRENT FreeBSD 12.0-CURRENT #1 r334417M: Thu May 31 07:47:47 PDT 2018 unknown@nohost.com:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64 Commands (from https://www.freebsd.org/doc/handbook/acpi-overview.html): > # sysctl debug.bootverbose=1 > # sysctl debug.acpi.suspend_bounce=1 > # acpiconf -s 3 cause USB to be deactivated with these messages: > May 31 14:09:12 xxx acpi[1801]: resumed at 20180531 14:09:12 > May 31 14:09:12 xxx kernel: uhub2: 4 ports with 4 removable, self powered > May 31 14:09:12 xxx kernel: random: harvesting attach, 8 bytes (4 bits) from uhub2 > May 31 14:09:13 xxx kernel: uhub_reattach_port: giving up port reset - device vanished Symptoms: USB mouse doesn't come back from the simulated suspend. Unplugging/replugging the mouse doesn't bring it back either. Only reboot helps. USB is identified as: > May 31 14:17:27 xxx kernel: ugen1.1: <AMD EHCI root HUB> at usbus1 > May 31 14:17:27 xxx kernel: ugen0.1: <0x1022 XHCI root HUB> at usbus0 > May 31 14:17:27 xxx kernel: uhub0: <AMD EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1 > May 31 14:17:27 xxx kernel: uhub1: <0x1022 XHCI root HUB, class 9/0, rev 3.00/1.00, addr 1> on usbus0
Also > # acpiconf -s 3 does put it to sleep, but when the system wakes up the screen is black, and memory can't be allocated: > # top > top: sysctlbyname kern.cp_times: Cannot allocate memory
Hardware: Lenovo laptop IdeaPad 320.