Mixxx can startet 2times - Task shortcut issue

[mixxxbot]

Reported by: stefan-franz
Date: 2022-06-30T08:45:45Z
Status: New
Importance: Undecided
Launchpad Issue: lp1980342
Attachments: [Bildschirmfoto vom 2022-06-30 10-37-12.png](https://bugs.launchpad.net/bugs/1980342/+attachment/5600649/+files/Bildschirmfoto vom 2022-06-30 10-37-12.png)

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Linux Mint 20.3 - Mixxx 1.4 alpha 1219

I made (as can be seen in the screenshot) a shortcut on the task bar for starting Mixxx. When i start, Mixxx comes up with the another picture in the task bar.
I accidentally clicked on the start link and mixsxx started a second time.

In my opinion whould be helpful if Mixxx is only startable 1 time. And normal, if i start an app over the task bar the app is displayed not separately in the taksbar but only one time under the start shortcut.

[mixxxbot]

Commented by: stefan-franz
Date: 2022-06-30T08:45:45Z
Attachments: [Bildschirmfoto vom 2022-06-30 10-37-12.png](https://bugs.launchpad.net/mixxx/+bug/1980342/+attachment/5600649/+files/Bildschirmfoto vom 2022-06-30 10-37-12.png)

[mixxxbot]

Commented by: daschuer
Date: 2022-06-30T09:27:20Z

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Let's investigate the taskbar issue first.
Why is the icon different?
Which desktop do you use?
How did you install Mixxx?

[mixxxbot]

Commented by: stefan-franz
Date: 2022-06-30T10:09:07Z

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Linux Mint 20.3 Cinnamon - normal installed without any tweaks

The "old" Button (screenshot right side) maybe comes from the previous flatpak installation of Mixxx 2.3.3

Additional info:
At the very beginning of me with Mixxx i installed about 6 month ago both versions (2.3).
Flatpak and the ppa version. The flatpak comes with the old button, the ppa with the new (left side on the screenshot).

I installed the Mixxx 2.4 so in a terminal:
$ sudo add-apt-repository ppa:mixxx/nightlies
$ sudo apt update
$ sudo apt install mixxx

[mixxxbot]

Commented by: daschuer
Date: 2022-06-30T12:21:15Z

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Will you issue also occur without flatpack installed previously?

[mixxxbot]

Commented by: stefan-franz
Date: 2022-06-30T12:46:11Z

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I can't test it (or you tell me how).
I deinstalled all Mixxx 2.3.3 Flatpaks on all devices and installed on all the ppa 2.4 - 1219 version.
Before i used on all devices the flatpak 2.3.3 version because the soundcard switching made at the ppa versions sometimes problems....and with the flatpak version not.