Re: Question about Multitasking on Plasma

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Martin Steigerwald posted on Wed, 01 Mar 2017 15:21:32 +0100 as excerpted:

> Am Mittwoch, 1. März 2017, 14:06:32 CET schrieb ianseeks:
>> On Wednesday, 1 March 2017 12:58:45 GMT Volker Wysk wrote:
>> > Am Mittwoch, 1. März 2017, 09:26:32 CET schrieb ianseeks:
>> > > I've found that if i context switch from Ctrl-Alt-F7 to Ctrl-Alt-F1
>> > > (e.g.
>> > > Just immediately after entering the password and pressing <cr>),
>> > > processing seems to stop on the graphical login. Is this normal?
>> > 
>> > I have this behaviour too.
>> > 
>> > I addition, this also occurs when I log out. The log out process can
>> > take a
>> > while, when you have a lot of open windows. When I switch to a
>> > virtual console, it stops.
> 
>> I've found that it doesn;t matter what is running on the VT7, it will
>> suspend, i only used the login as an example.  Seems strange for a
>> multitasking OS to do this.
> 
> I found this as well some time ago already when switching between two
> Plasma sessions, one on VT7 and one on VZ8.
> 
> Even when I run something in the Konsole as a long running command it
> gets paused at some time. Yet when I first run screen and then run the
> command in a screen session it continues to work.
> 
> I believe this to be part of systemd-logind session/seat management, but
> I didn´t find out yet for sure whether my belief matches reality.
> 
> I do not agree with that new behavior and would like to have the old
> behavior back.

I'm running systemd here and haven't seen the issue.  But I don't use a 
*DM either, preferring to login at the text console and run startx with a 
kde session configured from there.  I also don't have the whole policykit 
setup installed that most will be running.  (Running gentoo, it's 
optional, and I have the option turned off.)

Stands to reason it could be systemd user session or seat management, 
however.  All it'd need to do would be send a SIGSTOP to everything in 
that VT, sending SIGCONT when you switch back to it.  But presumably it 
uses the policykit or displaymanager infrastructure, and since I don't 
have either one installed, I don't see it.

I'd certainly be annoyed as well, if I did.

But if it's systemd, there's almost certainly some sort of configuration 
option to toggle the behavior.  I don't know what, but I can't imagine 
that sort of behavior not being configurable.

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman




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