ACPI-attached device problems in -current?

["John D. Baker" <jdbaker%mylinuxisp.com@localhost>]

I've made a habit of enabling the ACPI-attached versions of a number of
devices and consequently disabling their isa-attached versions.

This has usually worked without problems but recently booting i386-7.99.72
on one machine, most of those devices fail to attach.

Relevant 'dmesg' excerpts:

NetBSD 7.99.72 (GX260A) #69: Mon May 22 10:46:37 CDT 2017
        sysop%x3650.technoskunk.fur@localhost:/r1/build/current/obj/i386/sys/arch/i386/compile/GX260A
[...]
IBM 817234U (ThinkCentre S51)
[...]
pckbc1 at acpi0 (PSM, PNP0F13-0) (aux port)pckbc1: ACPI: unable to get _CRS resources: AE_AML_NO_RESOURCE_END_TAG
fdc0 at acpi0 (FDC, PNP0700-0)fdc0: ACPI: unable to get _CRS resources: AE_AML_NO_RESOURCE_END_TAG
com0 at acpi0 (COMA, PNP0501-0)com0: ACPI: unable to get _CRS resources: AE_AML_NO_RESOURCE_END_TAG
com1 at acpi0 (COMB, PNP0501-1)com1: ACPI: unable to get _CRS resources: AE_AML_NO_RESOURCE_END_TAG
atppc0 at acpi0 (LECP, PNP0401-0)atppc0: ACPI: unable to get _CRS resources: AE_AML_NO_RESOURCE_END_TAG

I wouldn't have noticed these except that 'getty' failed to start on
"/dev/tty00" claiming "com0: device not configured".

Actually, I have two of these old ThinkCentre machines net-booting and
mounting the same NFS filesystems (not simultaneously of course) and
one reports "device not configured" while the other successfully starts
'getty' on "/dev/tty00".  Both produce the identical 'dmesg' output
shown above.

I've not yet explored whether the other devices have problems or whether
any problems exist on one machine or the other.

Meanwhile, a similarly-configured kernel for netbsd-7 emits no such
disturbing messages for those same devices:

NetBSD 7.1_STABLE (GX260A) #24: Sat May 13 09:19:06 CDT 2017
        sysop%x3650.technoskunk.fur@localhost:/r1/build/netbsd-7/obj/i386/sys/arch/i386/compile/GX260A
[...]
IBM 817234U (ThinkCentre S51)
[...]
pckbc1 at acpi0 (PSM, PNP0F13-0) (aux port): irq 12
fdc0 at acpi0 (FDC, PNP0700-0): io 0x3f0-0x3f5,0x3f7 irq 6 drq 2
fdc0: failed to evaluate _FDE: AE_NOT_FOUND
com0 at acpi0 (COMA, PNP0501-0): io 0x3f8-0x3ff irq 4
com0: ns16550a, working fifo
com1 at acpi0 (COMB, PNP0501-1): io 0x2f8-0x2ff irq 3
com1: ns16550a, working fifo
atppc0 at acpi0 (LECP, PNP0401-0): io 0x378-0x37f,0x778-0x77f irq 7 drq 1


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