[Bug 225794] VM images for 12.0-CURRENT have problem with USB 3.0 ports

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225794

--- Comment #33 from Andriy Gapon <avg at FreeBSD.org> ---
(In reply to David.Boyd49 from comment #32)
Bummer.  I am really out of ideas now.  I think that we have tried every quirk
that Linux may use and nothing works...
One idea is trying the previous patches in combinations...

I would like to see SCSI debug messages that are produced during the original
probing.  The problem with getting them is that the only way to get them is to
enable debug messages for all devices.  And that means noise from ada0 and
ada1.

Maybe you could the following:
1. stop syslogd, so that the kernel log is not written to disk causing the
positive feedback loop
1a. alternatively, boot to single user mode and do things there
2. camcontrol debug -c -p -I -P all
3. plug the device
4. wait until CAM messages settle down
5. camcontrol debug off
6. check the captured messages in dmesg output

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