[Bug 220727] Cannot reboot Lenovo X1 Carbon (5th gen/2017)

[bugzilla-noreply at freebsd.org]

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

--- Comment #14 from Neel Chauhan <neel at 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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