[arm-allstar] Pi Terminal Sleep

[Doug Crompton]

There have been some issues with display power management on the Pi.
Probably all this does is blank the screen. If the monitor itself sees this
as a power saving mode I don't know. Modern flat screen monitors do not
need to be blanked for screen saving reasons only for power saving. It is
unclear on the Pi if this shuts off back lighting or just filters all
light. If it just makes the screen black but does not turn off back
lighting then it is of little value unless having characters on the screen
bothers you.

It is also really a waste of a good monitor to use HDMI on the Pi. Any
computer you have there or elsewhere can ssh to your pi and you would get
the same results and save a monitor and keyboard. I have many Allstar Pi's
and I can't even remember connecting an HDMI monitor except in a portable
arrangement. This is also essential if you have many servers. You would not
have a monitor connected to each but rather ssh sessions opened to each on
a single computer - Windows, Linux, Mac or whatever.


*73 Doug*

*WA3DSP*

*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*





On Fri, May 25, 2018 at 11:55 AM, "Charles Powell via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> The parameter you are looking to find is called console blanking.
>
> You can check console blanking with the command 'cat
> /sys/module/kernel/parameters/consoleblank’  to tell you whether blanking
> is on or off. It will return ‘0’ if off.  To enable in /boot/cmdline, the
> command is ‘consoleblank=xxx’ where xxx is the number of seconds delay
> before the screen goes off.   This is a kernel parameter.  /boot/cmdline
> must remain a single line.  ‘consoleblank=600’ would give a timeout for the
> display of 10 minutes.
>
> 73,
>
> Charles - NK8O
>
>
> > On May 25, 2018, at 6:15 AM, James Hause via arm-allstar <
> arm-allstar at hamvoip.org <mailto:arm-allstar at hamvoip.org>> wrote:
> >
> > Thanks for the quick reply.  I did the change, but monitor still does not
> > blank.
> > Here is what the config.txt has after I updated.
> >
> > # See /boot/overlays/README for all available options
> >
> > gpu_mem=64
> > initramfs initramfs-linux.img followkernel
> > hdmi_blanking=1
> >
> >
> > On Fri, May 25, 2018 at 1:06 AM, "Doug Crompton via arm-allstar" <
> > arm-allstar at hamvoip.org <mailto:arm-allstar at hamvoip.org>> wrote:
> >
> >> Jim,
> >>
> >> Now sure why anything would have changed.
> >>
> >> Try adding -
> >>
> >> hdmi_blanking=1
> >>
> >> to /boot/config.txt should fix the issue. Don't change anything else in
> >> that file.
> >>
> >> Let us know if that works.
> >>
> >>
> >> *73 Doug*
> >>
> >> *WA3DSP*
> >>
> >> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio> <
> http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>>*
> >>
> >>
> >>
> >>
> >>
> >> On Thu, May 24, 2018 at 6:30 PM, "James Hause via arm-allstar" <
> >> arm-allstar at hamvoip.org <mailto:arm-allstar at hamvoip.org>> wrote:
> >>
> >>> Not that this is a big deal, but I have noticed one thing since I did
> the
> >>> last update today.
> >>> On my hardware configuration, I have a 19 inch monitor attached to the
> >> Pi.
> >>> When I boot up my node, I would login, and get to the Admin screen.
> >> After
> >>> a few minutes of inactivity, the screen would go blank, and I would
> just
> >>> press a key, and the screen would come back.
> >>> After I did the update today, and I login in,  I get the admin screen,
> >> and
> >>> all is good, except now the screen does not go blank after minutes of
> >>> inactivity.  Not that this is a big deal, but don't want to burn an
> image
> >>> on my display, so my question is do I need to change a setting
> somewhere
> >>> now ?
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> >>>
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> >>>
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> >>
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> >>
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