laptop screen always shutdown if no keyboard interaction for several minutes

Andrew Pantyukhin infofarmer at
Tue Jan 23 09:24:10 UTC 2007

On 1/23/07, Zhang Weiwu <zhangweiwu at> wrote:
> Hello. I tried various ways to stop the laptop screen from being
> shutting down, as I use this screen to watch debug message of an
> application I am working on, I need monitor always on, no screensaver,
> no blank, no dpms etc.
> I cannot do it. I have tried:
>      1. set blanktime to "NO" in /etc/rc.conf
>      2. set saver to "NO" in /etc/rc.conf
>      3. start X server and run a terminal in it, run xset -dpms
>      4. check laptop BIOS setting (there is no setting for automatic
>         blank time
> I have not tried:
>      I. remove 'apm' from kernel (I didn't compile ACPI into kernel
>         because this is an old notebook I am not sure if ACPI works, but
>         I have compiled apm in kernel, which is not shown in dmesg and
>         doesn't seem to work, e.g. 'shutdown -p' do not turn off the
>         power)
>     II. install Windows on the same computer to see if Windows can keep
>         the monitor on.
>    III. boot the system to FreeDOS and see if monitor keep turned up (to
>         decide if LCD is turned off by hardware or software)
> Any suggestions?

Try playing a movie with mplayer, it keeps the display
on by default, I'm not sure how, but if it can than
there's a way.

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