[Bug 869017] Re: Ubuntu server enables screenblanking, concealing crashdumps (DPMS is not used)

[Charles Wilkins]

To Robie Basak, specifically #22,

You said, "I don't see how we created another problem. We changed the default,
that's all."

You seem to have concluded that merely a change of default functionally
was made at some point.

Perhaps that is the case. If so, what specifically was the default
setting that was changed? For example, was it a kernel compilation time
option? If so, can you please specify what setting can be changed back
in order to re-enable Console blanking using DPMS (console display in
power saving mode) for Ubuntu server 18.04?

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Title:
  Ubuntu server enables screenblanking, concealing crashdumps (DPMS is
  not used)

Status in kbd package in Ubuntu:
  Invalid
Status in linux package in Ubuntu:
  Fix Released
Status in kbd source package in Zesty:
  Invalid
Status in linux source package in Zesty:
  Fix Released
Status in kbd package in Debian:
  Fix Released

Bug description:
  James Rice of Jump Networks noticed that there is a screen-blanker
  enabled on Ubuntu Server.

  James notes that this blanking is not enabling DPMS power saving
  (thereby negating any power-saving benefit), and is simply turning the
  screen content blank.   This means that the crash output is invisible
  which is unhelpful on a server (virtual or otherwise).

  Ideally the screen should (at a minimum) be turned on and unblanked at
  the point of an OOPs/crash being printed.

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