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Date:      Thu, 26 Apr 2018 18:54:56 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 220727] Cannot reboot Lenovo X1 Carbon (5th gen/2017)
Message-ID:  <bug-220727-227-2vFhQoXWkm@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-220727-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-220727-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220727

--- Comment #14 from Neel Chauhan <neel@neelc.org> ---
I believe this is an issue with ng_ubt. Information on how to fix it (at least
on my Inspiron, maybe also for ThinkPads) is described on my website:

https://www.neelc.org/dell-inspiron-7352-fixing-the-blank-screen-on-reboot-problem-on-freebsd/

In short, you need a .conf file in /etc/devd with:

nomatch 50 {
    match "bus" "uhub[0-9]+";
    match "mode" "host";
    match "vendor" "VENDOR_ID";
    match "product" "PRODUCT_ID";
    #action "kldload -n ng_ubt";
    action "logger blocked bluetooth module";
};

Replace VENDOR_ID and PRODUCT_ID with the vendor and product IDs from ubt0. You
can find this out with:

grep -R ubt /var/log/messages

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