Feature request, but must be universallly accepted by ALL blanker authors

Gene Heskett gheskett at shentel.net
Sat Oct 3 08:08:36 UTC 2020

On Friday 02 October 2020 16:28:45 Alan Coopersmith wrote:

> On 10/2/20 12:18 PM, Gene Heskett wrote:
> > I have now been 3 days looking for a way to disable this blanker,
> > trying several methods by way of xset, only to find 15 minutes later
> > that its been undone and the blanker kicks in regardless.
> xset only controls the screen blanking & power management built into
> the X server.  Anything prompting for a password to unlock is from a
> client application or window manager/desktop environment, not the X
> server, and has its own controls.  (For GNOME 3, this is built into
> gnome-shell & gdm, for other environments it may be a standalone
> program like xscreensaver or xlockmore.)
> > So I am proposing that an env variable be named an agreed upon name,
> > and that its presence totally disables any and ALL screen blanker's
> > regardless of whose desktop of the day is installed.  We can
> > incorporate the setting of this, on launching LinuxCNC, and
> > unsetting it when LinuxCNC is being shut down.
> I don't see how LinuxCNC could set an environment variable that will
> be detected by programs that started before LinuxCNC was - normally
> environment variables are passed on from the process that starts
> another process and there's no common API to change one in an already
> running process.
> Fortunately, there's already an existing script which knows about the
> most common screensaver implementations and how to suspend them:
> https://linux.die.net/man/1/xdg-screensaver
> https://gitlab.freedesktop.org/xdg/xdg-utils/-/blob/master/scripts/xdg
> So LinuxCNC could call xdg-screensaver suspend with the ID of its
> control window.

On the machines own monitor, isn't that display 0:0?

Example command line please?

Thanks Alan.

Cheers, Gene Heskett
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Genes Web page <http://geneslinuxbox.net:6309/gene>

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