Mailing List Archive

On Tue, Apr 20, 2021 at 1:08 AM DryHeat122 <dryheat122@gmail.com> wrote:

> This problem could be eliminated if a normal exit (rather than a crash) were registered when one hits that exit button.

Produce a backtrace following the instructions on
the wiki and open an issue and attach the backtrace.
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On Mon, 19 Apr 2021 18:07:06 -0700, you wrote:

>I just had a very frustrating experience that I wanted to report because
>I'm sure this couldn't be the intended design.
>
>I changed my router, which uses a different default gateway, so it hosed
>the hard IP address I had coded into the backend. I mistakenly started the
>frontend and it put up a dialog called startup status or something, and of
>course it couldn't connect to the backend.
>
>One of the buttons on that screen is exit. I clicked and confirmed and it
>exited. But I got a notification saying the frontend crashed unexpectedly
>and would restart, which led me back into the process over and over.
>
>The restart is not the expected outcome of exiting, and it comes so fast
>it's hard to open a terminal window, etc., before it does. I finally
>managed, but it was not fun.
>
>This problem could be eliminated if a normal exit (rather than a crash)
>were registered when one hits that exit button.

I surmise you are running MythTV on an Ubuntu system. In Ubuntu, the
frontend is a program named "mythfrontend.real", which is run by a
script named "mythfrontend". It is the job of the script to restart
mythfrontend.real if it crashes, and as mythfrontend.real does
sometimes crash, I find it very useful. But the script does have a
bug which does what you have seen - it does not understand when
mythfrontend.real has been shut down, as opposed to crashing.

Even when it mythfrontend.real is being restarted all the time, it is
usually not a problem to open a terminal if you know how. But it
depends on the system. If you are running Xubuntu, then you should be
able to do Ctrl-Esc to bring up the desktop menu and start a terminal
from there. Due to a recent bug, if it is the first time you are
using Ctrl-Esc since booting, you may need to do it twice before you
get the menu. From the menu, go to Applications > Terminal Emulator
or Applications > System > Xfce Terminal. But it does depend on your
XFCE version as to where you will find a terminal.

And on almost any Linux these days, you can get a text mode terminal
by using Ctrl-Alt-F1. To get back to the GUI screen from there, it is
usually Ctrl-Alt-F7 on Ubuntu, but on other systems you may need to
try all the Ctrl-Alt-Fx keys.

On some systems, Ctrl-Alt-T opens a terminal window, but that may only
work when mythfrontend.real is not running.

It is also possible to log in from another PC via SSH if you have that
enabled.
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On Mon, Apr 19, 2021, 9:14 PM Stephen Worthington <stephen_agent@jsw.gen.nz>
wrote:

> On Mon, 19 Apr 2021 18:07:06 -0700, you wrote:
>
> >I just had a very frustrating experience that I wanted to report because
> >I'm sure this couldn't be the intended design.
> >
> >I changed my router, which uses a different default gateway, so it hosed
> >the hard IP address I had coded into the backend. I mistakenly started
> the
> >frontend and it put up a dialog called startup status or something, and of
> >course it couldn't connect to the backend.
> >
> >One of the buttons on that screen is exit. I clicked and confirmed and it
> >exited. But I got a notification saying the frontend crashed unexpectedly
> >and would restart, which led me back into the process over and over.
> >
> >The restart is not the expected outcome of exiting, and it comes so fast
> >it's hard to open a terminal window, etc., before it does. I finally
> >managed, but it was not fun.
> >
> >This problem could be eliminated if a normal exit (rather than a crash)
> >were registered when one hits that exit button.
>
> I surmise you are running MythTV on an Ubuntu system. In Ubuntu, the
> frontend is a program named "mythfrontend.real", which is run by a
> script named "mythfrontend". It is the job of the script to restart
> mythfrontend.real if it crashes, and as mythfrontend.real does
> sometimes crash, I find it very useful. But the script does have a
> bug which does what you have seen - it does not understand when
> mythfrontend.real has been shut down, as opposed to crashing.
>
> Even when it mythfrontend.real is being restarted all the time, it is
> usually not a problem to open a terminal if you know how. But it
> depends on the system. If you are running Xubuntu, then you should be
> able to do Ctrl-Esc to bring up the desktop menu and start a terminal
> from there. Due to a recent bug, if it is the first time you are
> using Ctrl-Esc since booting, you may need to do it twice before you
> get the menu. From the menu, go to Applications > Terminal Emulator
> or Applications > System > Xfce Terminal. But it does depend on your
> XFCE version as to where you will find a terminal.
>
> And on almost any Linux these days, you can get a text mode terminal
> by using Ctrl-Alt-F1. To get back to the GUI screen from there, it is
> usually Ctrl-Alt-F7 on Ubuntu, but on other systems you may need to
> try all the Ctrl-Alt-Fx keys.
>
> On some systems, Ctrl-Alt-T opens a terminal window, but that may only
> work when mythfrontend.real is not running.
>
> It is also possible to log in from another PC via SSH if you have that
> enabled.
>

Yes it it Ubuntu. It never occurred to me to use ctl-alt-f1. I suppose I
could also learn not to start the FE before the BE is running!

Since this is a "feature" rather than a bug, I won't post a ticket on it.

>

On Wed, 21 Apr 2021 18:37:17 -0700, you wrote:

>On Mon, Apr 19, 2021, 9:14 PM Stephen Worthington <stephen_agent@jsw.gen.nz>
>wrote:
>
>> On Mon, 19 Apr 2021 18:07:06 -0700, you wrote:
>>
>> >I just had a very frustrating experience that I wanted to report because
>> >I'm sure this couldn't be the intended design.
>> >
>> >I changed my router, which uses a different default gateway, so it hosed
>> >the hard IP address I had coded into the backend. I mistakenly started
>> the
>> >frontend and it put up a dialog called startup status or something, and of
>> >course it couldn't connect to the backend.
>> >
>> >One of the buttons on that screen is exit. I clicked and confirmed and it
>> >exited. But I got a notification saying the frontend crashed unexpectedly
>> >and would restart, which led me back into the process over and over.
>> >
>> >The restart is not the expected outcome of exiting, and it comes so fast
>> >it's hard to open a terminal window, etc., before it does. I finally
>> >managed, but it was not fun.
>> >
>> >This problem could be eliminated if a normal exit (rather than a crash)
>> >were registered when one hits that exit button.
>>
>> I surmise you are running MythTV on an Ubuntu system. In Ubuntu, the
>> frontend is a program named "mythfrontend.real", which is run by a
>> script named "mythfrontend". It is the job of the script to restart
>> mythfrontend.real if it crashes, and as mythfrontend.real does
>> sometimes crash, I find it very useful. But the script does have a
>> bug which does what you have seen - it does not understand when
>> mythfrontend.real has been shut down, as opposed to crashing.
>>
>> Even when it mythfrontend.real is being restarted all the time, it is
>> usually not a problem to open a terminal if you know how. But it
>> depends on the system. If you are running Xubuntu, then you should be
>> able to do Ctrl-Esc to bring up the desktop menu and start a terminal
>> from there. Due to a recent bug, if it is the first time you are
>> using Ctrl-Esc since booting, you may need to do it twice before you
>> get the menu. From the menu, go to Applications > Terminal Emulator
>> or Applications > System > Xfce Terminal. But it does depend on your
>> XFCE version as to where you will find a terminal.
>>
>> And on almost any Linux these days, you can get a text mode terminal
>> by using Ctrl-Alt-F1. To get back to the GUI screen from there, it is
>> usually Ctrl-Alt-F7 on Ubuntu, but on other systems you may need to
>> try all the Ctrl-Alt-Fx keys.
>>
>> On some systems, Ctrl-Alt-T opens a terminal window, but that may only
>> work when mythfrontend.real is not running.
>>
>> It is also possible to log in from another PC via SSH if you have that
>> enabled.
>>
>
>Yes it it Ubuntu. It never occurred to me to use ctl-alt-f1. I suppose I
>could also learn not to start the FE before the BE is running!
>
>Since this is a "feature" rather than a bug, I won't post a ticket on it.

No, it is a bug. The mythfrontend script should be detecting the
difference between mythfrontend.rel being shut down and it crashing or
being killed. However, that relies on a way of telling the
difference, which may require changes in mythfrontend.real as well as
the mythfrontend script.
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mythtv-users mailing list
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http://lists.mythtv.org/mailman/listinfo/mythtv-users
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