[Bug 238492] Trouble with Intel Wireless-AC 8265

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=238492

            Bug ID: 238492
           Summary: Trouble with Intel Wireless-AC 8265
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: wireless
          Assignee: wireless at FreeBSD.org
          Reporter: moritz at schmi.tt

Created attachment 204983
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=204983&action=edit
Output of dmesg, sysctl -a, and pciconf -lv

I am using FreeBSD-CURRENT (Rev. 348849) on a Lenovo Thinkpad T470. As a
wireless network interface it has an Intel Dual Band Wireless-AC 8265, which
needs FreeBSD's iwm device.

Until "a few" revisions ago Wifi worked fine. But now it doesn't work anymore
and I get the following errors when booting:

        KLD if_iwm.ko: depends on kernel - not available or version mismatch
        linker_load_file: /boot/kernel/if_iwm.ko - unsupported file type
        KLD ng_ubt.ko: depends on kernel - not available or version mismatch
        linker_load_file: /boot/kernel/ng_ubt.ko - unsupported file type
        KLD ng_ubt.ko: depends on kernel - not available or version mismatch
        linker_load_file: /boot/kernel/ng_ubt.ko - unsupported file type
        KLD mac_ntpd.ko: depends on kernel - not available or version mismatch
        linker_load_file: /boot/kernel/mac_ntpd.ko - unsupported file type
        KLD if_iwm.ko: depends on kernel - not available or version mismatch
        linker_load_file: /boot/kernel/if_iwm.ko - unsupported file type

All these modules are present in /boot/kernel and were updated during the
compile & install process. However, I am not sure why I would need them anyway
because I compiled device support for iwm into the kernel.

To compile FreeBSD from source I did the following:

        # cd /usr/src
        # sudo make cleanworld
        # sudo make -j4 buildworld
        # sudo make -j4 buildkernel KERNCONF=BSD1993
        # cd /usr/src
        # sudo make installkernel KERNCONF=BSD1993
        # shutdown -r now
        # cd /usr/src
        # make installworld
        # shutdown -r now

The custom kernel config I use is GENERIC plus

        device iwm
        device iwmfw

This kernel config worked before.

Please find attached the output of dmesg, sysctl -a, and pciconf -lv.

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