I had attached the umodem serial console of my OD1000 to the free USB port on my cubox and it had worked just fine when I upgraded the OD1000 to the July 19 snapshot. The cubox was running this at that time: OpenBSD 6.3-current (GENERIC) #40: Fri May 25 13:29:14 MDT 2018
Now, the cubox is running OpenBSD 6.4 (GENERIC) #68: Sat Oct 6 22:56:37 MDT 2018 ...and running 'cu -l cuaU0 -s 115200' reproducibly triggers a panic: panic: ehci_device_clear_toggle: queue active Stopped at db_enter: ldrb r15, [r15, r15, ror r15]! TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter rlv=0xc054ab80 rfp=0xce7bce18 ehci_device_intr_done rlv=0xc05b4b2c rfp=0xce7bce40 usbd_clear_endpoint_stall_async+0x3c rlv=0xc05dedf0 rfp=0xce7bce70 ucomwritecb+0x138 rlv=0xc05b46a4 rfp=0xce7bce90 usb_transfer_complete+0x248 rlv=0xc0549630 rfp=0xce7bceb8 ehci_softintr+0x158 rlv=0xc0738658 rfp=0xce7bced8 softintr_dispatch+0x88 rlv=0xc034b120 rfp=0xce7bcf00 arm_do_pending_intr+0xd4 rlv=0xc03a1618 rfp=0xce7bcf28 ampintc_irq_handler+0x188 rlv=0xc04020f8 rfp=0xce7bcfa8 irq_entry+0x78 rlv=0xc04f0420 rfp=0xc09c1f48 Bad frame pointer: 0xc09c1f48 Full dmesg below. Upgrade to current snap and try again? ddb pokery? Philip OpenBSD 6.4 (GENERIC) #68: Sat Oct 6 22:56:37 MDT 2018 dera...@armv7.openbsd.org:/usr/src/sys/arch/armv7/compile/GENERIC real mem = 2147483648 (2048MB) avail mem = 2095984640 (1998MB) mainbus0 at root: SolidRun Cubox-i Dual/Quad cpu0 at mainbus0: ARM Cortex-A9 r2p10 (ARMv7) cpu0: DC enabled IC enabled WB disabled EABT branch prediction enabled cpu0: 32KB(32b/l,4way) I-cache, 32KB(32b/l,4way) wr-back D-cache cortex0 at mainbus0 amptimer0 at cortex0: tick rate 396000 KHz armliicc0 at cortex0: rtl 7 waymask: 0x0000000f imxtemp0 at mainbus0simplebus0 at mainbus0: "soc" ampintc0 at simplebus0 nirq 160, ncpu 4: "interrupt-controller" simplebus1 at simplebus0: "aips-bus" imxccm0 at simplebus1 imxanatop0 at simplebus1 syscon0 at simplebus1: "snvs" imxrtc0 at syscon0 syscon1 at simplebus1: "iomuxc-gpr" imxiomuxc0 at simplebus1 simplebus2 at simplebus1: "spba-bus" imxuart0 at simplebus2: console imxgpio0 at simplebus1 imxgpio1 at simplebus1 imxgpio2 at simplebus1 imxgpio3 at simplebus1 imxgpio4 at simplebus1 imxgpio5 at simplebus1 imxgpio6 at simplebus1 imxdog0 at simplebus1 simplebus3 at simplebus1: "anatop" imxgpc0 at simplebus1 simplebus4 at simplebus0: "aips-bus" syscon2 at simplebus4: "ocotp" imxehci0 at simplebus4 usb0 at imxehci0: USB revision 2.0 uhub0 at usb0 configuration 1 interface 0 "i.MX EHCI root hub" rev 2.00/1.00 addr 1 imxehci1 at simplebus4 usb1 at imxehci1: USB revision 2.0 uhub1 at usb1 configuration 1 interface 0 "i.MX EHCI root hub" rev 2.00/1.00 addr 1 fec0 at simplebus4 fec0: address d0:63:b4:00:74:d0 atphy0 at fec0 phy 0: AR8035 10/100/1000 PHY, rev. 2 imxesdhc0 at simplebus4 imxesdhc0: 198 MHz base clock sdmmc0 at imxesdhc0: 4-bit, sd high-speed, mmc high-speed, dma imxesdhc1 at simplebus4 imxesdhc1: 198 MHz base clock sdmmc1 at imxesdhc1: 4-bit, sd high-speed, mmc high-speed, dma imxiic0 at simplebus4 iic0 at imxiic0 imxiic1 at simplebus4 iic1 at imxiic1 pcfrtc0 at iic1 addr 0x68: battery ok imxuart1 at simplebus4 imxahci0 at simplebus0: AHCI 1.3 imxahci0: port 0: 3.0Gb/s scsibus0 at imxahci0: 32 targets sd0 at scsibus0 targ 0 lun 0: <ATA, OCZ-AGILITY3, 2.15> SCSI3 0/direct fixed naa.5e83a97e097b5eee sd0: 57241MB, 512 bytes/sector, 117231408 sectors, thin scsibus1 at sdmmc1: 2 targets, initiator 0 sd1 at scsibus1 targ 1 lun 0: <SD/MMC, SL08G, 0080> SCSI2 0/direct removable sd1: 7580MB, 512 bytes/sector, 15523840 sectors bwfm0 at sdmmc0 function 1 manufacturer 0x02d0, product 0x4330 at sdmmc0 function 2 not configured umodem0 at uhub1 port 1 configuration 1 interface 0 "SoftIron, Inc. OverDrive 1000" rev 2.00/1.02 addr 2 umodem0: data interface 1, has no CM over data, has break umodem0: status change notification available ucom0 at umodem0 ugen0 at uhub1 port 1 configuration 1 "SoftIron, Inc. OverDrive 1000" rev 2.00/1.02 addr 2 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets bootfile: sd0a:/bsd boot device: sd0 root on sd1a (378ff7368c1bd675.a) swap on sd1b dump on sd1b WARNING: / was not properly unmounted