[Bug 237666] repeated messages of "uhub_reattach_port: giving up port reset - device vanished"

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237666

--- Comment #18 from Mike Karels <karels at freebsd.org> ---
Commenting out EARLY_AP_STARTUP from the kernel config did not seem to change
anything: the error message still repeats, and apcupsd loses contact with the
UPS (probably never has it). I forgot to change the ident, but the APs were not
started until nearly the end of autoconfiguration, just before attaching cd0
and mounting root.  The error messages start after that, after finding several
more USB devices.  From messages:

Aug  7 21:43:31 pughole kernel: Launching APs: 1 10 3 8 9 11 5 7 4 2 6
Aug  7 21:43:31 pughole kernel: cd0 at ahcich1 bus 0 scbus0 target 0 lun 0
Aug  7 21:43:31 pughole kernel: cd0: <HL-DT-ST BD-RE  WH14NS40 1.00> Removable
C
D-ROM SCSI device
Aug  7 21:43:31 pughole kernel: cd0: Serial Number SIK9IFALJ462
Aug  7 21:43:31 pughole kernel: cd0: 150.000MB/s transfers (SATA 1.x, UDMA6,
ATA
PI 12bytes, PIO 8192bytes)
Aug  7 21:43:31 pughole kernel: cd0: Attempt to query device size failed: NOT
RE
ADY, Medium not present - tray closed
Aug  7 21:43:31 pughole kernel: Trying to mount root from ufs:/dev/nvd0p5
[rw]..
.
Aug  7 21:43:31 pughole kernel: uhub0: 4 ports with 4 removable, self powered
Aug  7 21:43:31 pughole kernel: ZFS filesystem version: 5
Aug  7 21:43:31 pughole kernel: ZFS storage pool version: features support
(5000
)
Aug  7 21:43:31 pughole kernel: uhub2: 2 ports with 2 removable, self powered
Aug  7 21:43:31 pughole kernel: uhub3: 2 ports with 2 removable, self powered
Aug  7 21:43:31 pughole kernel: uhub1: 21 ports with 21 removable, self powered
Aug  7 21:43:31 pughole kernel: uhub_reattach_port: giving up port reset -
device vanished
Aug  7 21:43:31 pughole kernel: ugen1.2: <vendor 0x045b product 0x0209> at
usbus1
Aug  7 21:43:31 pughole kernel: uhub4 numa-domain 0 on uhub1
Aug  7 21:43:31 pughole kernel: uhub4: <vendor 0x045b product 0x0209, class
9/0, rev 2.10/1.00, addr 1> on usbus1

Any reason to try these in combination?

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