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Date:      Sun, 04 Sep 2016 12:31:39 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-usb@FreeBSD.org
Subject:   [Bug 211895] Logitech K360 keyboard: `usbconfig` hangs after suspend/resume
Message-ID:  <bug-211895-17-U5ItzFknpD@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-211895-17@https.bugs.freebsd.org/bugzilla/>
References:  <bug-211895-17@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211895

--- Comment #4 from Aleksander Alekseev <afiskon@devzen.ru> ---
I'm sorry but I'm having some problems getting a backtrace.

There are:

```
dumpdev=3D"AUTO"
ddb_enable=3D"YES"
```

... lines in /etc/rc.conf

I can't enter debugger using sysctl:

```
$ sudo sysctl debug.kdb.enter=3D1
Password:
debug.kdb.enter: 0 -> 0
```

Ctr+Alt+Escape hotkey doesn't work either.

I can crash a kernel using:

```
sudo sysctl debug.kdb.panic=3D1
```

... command but after reboot there is no dump in /var/crash directory.

I tried to reboot without loading i915kms.ko in case it causes these proble=
ms.
But without this driver screen doesn't turn on after suspend/resume so even=
 if
I enter a debugger I can't read a backtrace.

In dmesg -a I see:

```
No suitable dump device was found.
/etc/rc: WARNING: failed precmd routine for ddb
```

Full `dmesg -a` after crash and reboot:

http://afiskon.ru/s/67/6c0d4868c6_dmesg_a_after_crash.txt

I have a single disk partition, no swap:

```
# Device        Mountpoint      FStype  Options Dump    Pass#
/dev/ada0p2     /               ufs     rw      1       1
```

`savecore -v` tells me `savecore: no dumps found`.


uname -a:

``
FreeBSD e733 11.0-RC2 FreeBSD 11.0-RC2 #0 r304729: Wed Aug 24 06:59:03 UTC =
2016
    root@releng2.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64
```

Any advice?

--=20
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