[ltp] T42 issues powering off lcd with setterm

[Henrique de Moraes Holschuh]

On Thu, 25 Dec 2008, Dave Wood wrote:
> I have a problem getting the lcd screen to power off on my T42 via setterm
> command.

Look in the documentation for the kernel, for the escape sequence that
enables DPMS.  Any thinkpad display will shut the backlight off when the
system kicks it to DPMS state "off" (and probably also if you set it to
hibernate, DPMS has four states: on, sleep, hibernate, off.  off and on are
obvious, sleep and hibernate have different requirements for standby power
and latency to switch back to "on" (unlikely to matter in an LCD).

On the usual misguided attempt to make it better for people that buy crap,
Debian, Ubuntu and others disable DPMS on the text console by default :(

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh