Touchscreen on raspberry with mixxx > 2.1.8

Bug #1895431 reported by Lorenzo
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Fix Released
Daniel Schürmann

Bug Description

I've created a post also in the mixxx forum but i think this is a bug and is not correct to overcome it with a workaround.
I will copy-paste the message from the forum:

I’m using a raspberry and i have different touchscreens.
With mixxx versions < 2.1.8 (QT4) i had no problem at all.
Starting with mixxx 2.2 (QT5) all my thouscreens that act like touch devices stopped working.
The touchscreens that emulate a normal mouse still works, (in this kind of touchscreens if you drag over a web page the text will be selected as if you click and drag a real mouse).
The touchscreens that act as a touch devices are the one that, if in a web page you drag over the page, the page scroll, so a different behaviour with respect to a normal click-and-drag action done with a mouse.
Switching to mixxx > 2.1.8 had broke this compatibility, now all the touchscreens that raspbian handle like “touch devices” and not like “normal mouse” doesn’t work anymore.
How can i use the latest version of mixxx on this kind of devices?

Revision history for this message
Lorenzo (bhestia) wrote :

Update: same problem not just on raspbian but also on ubuntu mate

Revision history for this message
Evan (ehendrikd) wrote :

After changing my RP4 screen to a Waveshare DSI touch screen I also found that:

- Menus could not be clicked
- Library tree and table items could not be clicked
- Any skin buttons could be clicked fine

Some debugging later I found that (counter intuitively) commenting out the following line:

Fixed the issue and now the touchscreen works as expected. Are you in a position to compile Mixxx from source on your pi and confirm if this fixes the issue?

Changed in mixxx:
status: New → Confirmed
importance: Undecided → High
Revision history for this message
Daniel Schürmann (daschuer) wrote :

I can confirm this on Ubuntu Bionic.

Original this was introduced here to allow mutitouch.

after removing this line

multitouch still works here, so I guess qt has its own solution now and our own solution is broken.

Unfortunately after [Controls]", "touch_shift" for a right mouse click is now broken in the library. For the the buttons it is still working.

Changed in mixxx:
milestone: none → 2.3.0
Changed in mixxx:
assignee: nobody → Daniel Schürmann (daschuer)
Revision history for this message
Daniel Schürmann (daschuer) wrote :

A PR is waiting for review that should fix the reported issues.

Changed in mixxx:
status: Confirmed → In Progress
Be (
Changed in mixxx:
status: In Progress → Fix Committed
Changed in mixxx:
status: Fix Committed → Fix Released
Revision history for this message
Swiftb0y (swiftb0y) wrote :

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:

lock status: Metadata changes locked and limited to project staff
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