Public bug reported:

Since about two weeks my system has repeatedly crashed completely
without any error notice. The screen freezes and no keys respond. I have
to shut down the computer pushing the button to turn it on for a couple
of seconds. On reboot, I usually get the error message

PXE-E61: Media test failure, check cable
PXE-M0F: Exiting Intel Boot Agent

But usually Kubuntu boots after that without problems. Sometimes I have
to Ctrl+Alt+Del to get boot going.

I have no idea what causes the crash, it happens suddenly and without
any hint about what triggers it. I attach the content of /var/log/syslog
right before the crash from a couple of times it happened.

I am running Kubuntu 16.04.3 LTS with Kernel 4.13.0-31 on a ThinkPad
T460s.

** Affects: ubuntu
     Importance: Undecided
         Status: New


** Tags: bot-comment

** Attachment added: "Output of Syslog after reboot right after crashes"
   
https://bugs.launchpad.net/bugs/1745814/+attachment/5044397/+files/freezes-syslog-after-reboot

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https://bugs.launchpad.net/bugs/1745814

Title:
  Kubuntu crashes repeatedly without error notices

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