On Wed, 11 Mar 2020 00:35:16 +0000, bob prohaska wrote:

> There seem to be two broad classes of monitors, CEA and DMT. I've been
> letting Raspbian sniff out its own settings. Might forcibly setting the
> display mode make a difference?
>
On this laptop, which is running Fedora 31 Linux and uses the XFCE
desktop, so may not do things in quite the same way, as Raspbian.

For instance xset doesn't always do what it says on the tin. For
instance, I tried using xset to turn 'Bell' ( ox07, Ctrl-G ) on, off and
to change the loudness, frequency and length of the sound. None worked.

XFCE has a Power Manager tool on its Settings menu which does things like
controlling what happens when the screen is closed (switch off display,
suspend or hibernate)

Similarly, XFCE has delegated screen timeout and blanking timeouts to the
Screensaver tool, also on the Settings menu, as well as telling it what
timewasting display to show, if any, when it has timed out. This tool
also controls what the system does after the screen blanks but is left
open without the machine being used - whether it goes to standby, suspend
or power off after a long (configurable) period of inactivity.

A number of other Linux desktops delegate control and configuration
screen blanking and power saving settings to the screensaver and so,
IIRC, does Windows, so its fairly likely that the default Raspbian
desktop does the same.

Disclaimer: I don't know for sure that this is the case because my RPi
has always been run headless over an SSH session. I've never run it any
other way.


--
Martin    | martin at
Gregorie  | gregorie dot org

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