Comment 40 for bug 1630063

"And it looks like those updates are in Ubuntu-4.8.0-28:"
I think not.

I do not find mention of this bug in the changelog for 4.8.0-28-generic (I searched for IO_WATCHDOG_DELAY, and USB and ohci - nothing for the latest version)
and an attempted print failed exactly the same way, with a dead-in-the-water USB mouse, and with most of the USB devices no longer listed for lsusb.

My usb reset script (not mine - I found it online somewhere, and modified it a bit to fit my situation) brought things back again and the syslog entries look just like before... :

Nov 18 18:12:26 scott-ASUS-M2N68-AM-PLUS kernel: [ 7049.029702] ohci-pci 0000:00:02.0: HcDoneHead not written back; disabled
Nov 18 18:12:26 scott-ASUS-M2N68-AM-PLUS kernel: [ 7049.029709] ohci-pci 0000:00:02.0: HC died; cleaning up
Nov 18 18:12:26 scott-ASUS-M2N68-AM-PLUS kernel: [ 7049.029770] usb 2-1: USB disconnect, device number 2
Nov 18 18:12:26 scott-ASUS-M2N68-AM-PLUS kernel: [ 7049.029772] usb 2-1.1: USB disconnect, device number 5
Nov 18 18:12:26 scott-ASUS-M2N68-AM-PLUS kernel: [ 7049.072512] usb 2-1.2: USB disconnect, device number 6
Nov 18 18:12:26 scott-ASUS-M2N68-AM-PLUS acpid: input device has been disconnected, fd 10
Nov 18 18:12:26 scott-ASUS-M2N68-AM-PLUS kernel: [ 7049.174018] usb 2-1.3: USB disconnect, device number 7
Nov 18 18:12:26 scott-ASUS-M2N68-AM-PLUS kernel: [ 7049.216254] usb 2-1.4: USB disconnect, device number 8
Nov 18 18:12:26 scott-ASUS-M2N68-AM-PLUS kernel: [ 7049.217445] usb 2-2: USB disconnect, device number 3
Nov 18 18:12:26 scott-ASUS-M2N68-AM-PLUS kernel: [ 7049.259107] usb 2-3: USB disconnect, device number 4
Nov 18 18:17:01 scott-ASUS-M2N68-AM-PLUS CRON[21826]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Nov 18 18:17:34 scott-ASUS-M2N68-AM-PLUS kernel: [ 7357.692303] ehci-pci 0000:00:02.1: remove, state 1
Nov 18 18:17:34 scott-ASUS-M2N68-AM-PLUS kernel: [ 7357.692312] usb usb1: USB disconnect, device number 1
Nov 18 18:17:34 scott-ASUS-M2N68-AM-PLUS kernel: [ 7357.692313] usb 1-4: USB disconnect, device number 5
Nov 18 18:17:34 scott-ASUS-M2N68-AM-PLUS kernel: [ 7357.731566] usb 1-6: USB disconnect, device number 6

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scott@scott-ASUS-M2N68-AM-PLUS:~$ uname -a
Linux scott-ASUS-M2N68-AM-PLUS 4.8.0-28-generic #30-Ubuntu SMP Fri Nov 11 14:03:52 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

scott@scott-ASUS-M2N68-AM-PLUS:~$ apt-cache policy linux-image*
linux-image-extra-4.8.0-28-generic:
  Installed: 4.8.0-28.30
linux-image-generic:
  Installed: 4.8.0.28.37
linux-image-4.8.0-28-generic:
  Installed: 4.8.0-28.30