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Re: GUI pauses when on TTY

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On Sat, 18 Feb 2023 17:59:06 +0100, Carlos E.R. wrote:
>
> On 2023-02-18 15:59, Rich wrote:
>> Andreas Kohlbach <ank@spamfence.net> wrote:
>>> Yes, I am old school and like to work on a TTY whenever possible. But of
>>> course I need GUI browsers and other GUI stuff too.
>>>
>>> And before someone says, "Use Xterm in full screen", please don't. :-)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [1]
>>> My problem is that on MATE (MINT Linux) pretty much everything stalls
>>> once I switch to a TTY.
>> If you mean the shift+alt+Fx key to swtich to one of Linux's native
>> terminals, then this is expected.  The switch out of X and back to a
>> TTY is a suspend of X, meaning the entire X session is paused.
>
> AFAIK the GUI is not suspended. This behaviour is relatively new, I
> don't remember when it started. It affects multimedia.

Thanks Carlos. Something I also observed: new thingy. Probably five years
or less.

>      You can run a long job, like a backup script, and it
>      should continue running non stop when switching to a TTY.
>
> The same toolset that is used to "detect who is at the seat" does
> it. Rationale is that it gives permissions to use the sound device to
> the person that is seated, meaning the person having the GUI. As when
> in tty mode no one has the GUI, there is no permission to use sound
> and things stop.

Ah "seats". I noted this term in logs. Will have to read up on this. Thanks.

> This could be HAL/ConsoleKit/PolicyKit. Or could be the display
> manager doing it.

Sounds promising.

But hard to google for "GUI" and "suspend", as results usually deal with
suspending the whole system (hibernate).

[1]

> The way to avoid this is not using the TTY, but an xterm.

That I tried to avoid. I want to kick it old school. :-D

[Update]

New observation: Just started a video via mpv and switched to a TTY (to
write this article here). I still can hear the music playing! Assuming
the video would also progress.

So some stuff seems to "bypass a 'suspended' GUI". Now I'd like to tell
that a suspension doesn't happen at all, or tell more apps to get around
this.
-- 
Andreas

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Thread

GUI pauses when on TTY Andreas Kohlbach <ank@spamfence.net> - 2023-02-18 02:07 -0500
  Re: GUI pauses when on TTY The Natural Philosopher <tnp@invalid.invalid> - 2023-02-18 10:02 +0000
    Re: GUI pauses when on TTY Andreas Kohlbach <ank@spamfence.net> - 2023-02-18 14:20 -0500
  Re: GUI pauses when on TTY Rich <rich@example.invalid> - 2023-02-18 14:59 +0000
    Re: GUI pauses when on TTY "Carlos E.R." <robin_listas@es.invalid> - 2023-02-18 17:59 +0100
      Re: GUI pauses when on TTY Andreas Kohlbach <ank@spamfence.net> - 2023-02-18 14:35 -0500
        Re: GUI pauses when on TTY "Carlos E.R." <robin_listas@es.invalid> - 2023-02-18 21:00 +0100
          Re: GUI pauses when on TTY Andreas Kohlbach <ank@spamfence.net> - 2023-02-18 21:29 -0500
        Re: GUI pauses when on TTY The Natural Philosopher <tnp@invalid.invalid> - 2023-02-19 12:03 +0000
      Re: GUI pauses when on TTY Dan Espen <dan1espen@gmail.com> - 2023-02-18 20:08 -0500
        Re: GUI pauses when on TTY Andreas Kohlbach <ank@spamfence.net> - 2023-02-18 21:37 -0500
          Re: GUI pauses when on TTY Dan Espen <dan1espen@gmail.com> - 2023-02-18 22:16 -0500
        Re: GUI pauses when on TTY Dan Espen <dan1espen@gmail.com> - 2023-02-18 22:23 -0500
          Re: GUI pauses when on TTY Andreas Kohlbach <ank@spamfence.net> - 2023-02-19 17:31 -0500
        Re: GUI pauses when on TTY "Carlos E.R." <robin_listas@es.invalid> - 2023-02-19 13:12 +0100
      Re: GUI pauses when on TTY marrgol <marrgol@address.invalid> - 2023-02-19 02:54 +0100

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