No keyboard or mouse for X11 after r349596 -> r349645 update

I saw no issues on my (headless) build machine with the update, but on
my laptop (where I run xdm), the mouse was unresponsive, and I see these
messages (in /var/log/messages):

<28>1 2019-07-03T11:34:32.927353+00:00 g1-49.catwhisker.org console-kit-daemon 1142 - - WARNING: Error waiting for native console 1 activation: Inappropriate ioctl for device
<28>1 2019-07-03T11:34:32.927400+00:00 g1-49.catwhisker.org console-kit-daemon 1142 - - WARNING: Error waiting for native console 9 activation: Inappropriate ioctl for device
<37>1 2019-07-03T11:34:39.152108+00:00 g1-49.catwhisker.org login 1263 - - ROOT LOGIN (root) ON ttyv1
<13>1 2019-07-03T11:34:45.329489+00:00 g1-49.catwhisker.org devd 808 - - check_clients:  dropping disconnected client
<13>1 2019-07-03T11:35:45.350116+00:00 g1-49.catwhisker.org syslogd - - - last message repeated 1 times
<28>1 2019-07-03T11:35:47.565077+00:00 g1-49.catwhisker.org console-kit-daemon 1142 - - WARNING: Error waiting for native console 1 activation: Inappropriate ioctl for device
<28>1 2019-07-03T11:35:47.565157+00:00 g1-49.catwhisker.org console-kit-daemon 1142 - - WARNING: Error waiting for native console 2 activation: Inappropriate ioctl for device
<28>1 2019-07-03T11:35:47.565201+00:00 g1-49.catwhisker.org console-kit-daemon 1142 - - WARNING: Error waiting for native console 9 activation: Inappropriate ioctl for device

I note that:
* Ports are built under stable/11.
* I have the misc/compat11x port installed.
* On the laptop in question (and my build machine), I update:
  * stable/11
  * installed ports
  * stable/12
  * head
  daily, in that sequence.
* This has been working for a long time, but X11 isn't seeing the
  keyboard or mouse in head now.  (They worked fine yesterday,
  running r349596.)  Both respond on vtys: I copy/pasted a fair bit
  of this, and it's the laptop's keyboard I am using to type it.
* The updates today were:
  * stable/11: r349575 -> r349648
  * installed ports (r505669 -> r505743):
    * Upgrade of libuv-1.30.0 to libuv-1.30.1
    * Upgrade of ffmpeg-4.1.3_13,1 to ffmpeg-4.1.3_14,1
  * stable/12: r349572 -> r349644
  * head: r349596 -> r349645

Is there, perhaps, a configuration knob I need to adjust?

Thanks!

Peace,
david
-- 
David H. Wolfskill				david_at_catwhisker.org
No, Mr. Trump, I do NOT "have people on both sides of that".  The five
young men were shown to be factually innocent back in 2002.  You are
exacerbating hatred and advocating lynching.  You should be ashamed.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.