Multiple QT apps in virtual Terminals

navikh333

Hi All,

I have 2 QT apps. The first apps is Sway which runs on XCB platform plugin. The 2nd app is another QT app which either uses eglfs or linuxfb as platform plugin.

First I run sway, then I run the 2nd app which first switches the virtual terminal to tty2 and then displays. Now I want to switch to tty1 which has sway running. With LinuxFb plugin in 2nd QT app I cannot do chvt 1 because it just hangs. If I use eglfs plugin to run second app it never switches virtual terminals and displays.

Please let me know how can I run 2 QT apps in different virtual terminals.

Thank you for your support.

SGaist

Hi and welcome to devnet,

I am not sure that this possible like that.

Why not use xcb for both ?

navikh333

Hi @SGaist

We want to slowly move away to EGLFS but for now we have one QT app(Sway compositor https://swaywm.org/ ) with XCB plugin and the other with EGLFS.
Two questions

Would 2 qt apps run in parallel in virtual terminal if they both use EGLFS plugin and switch between them using chvt? If NO, why?
Would 2 qt apps run in parallel in virtual terminal if they both use Linuxfb plugin and switch between them using chvt? If NO, why?

Sorry, I am very new to QT. I couldnt find any questions related to my use case where 2 QT apps/processes use the same display.

Thanks a lot.

SGaist

I highly doubt that because each application will take ownership of input devices.
Same as above.

If you want active multi-head support why are you dumping Wayland ?