Problem when using Hybrid GPU

I’ve been having a lot of problems with my AMD/Intel hybrid notebook.

After researching quite a lot i found out I could select what apps to run in which GPU.
But now when i try to use the command:

DRI_PRIME=1 vivaldi-stable  

I get the message:

[33486:33486:0216/153959.995192:ERROR:sandbox_linux.cc(377)] InitializeSandbox() called with multiple threads in process gpu-process.
[33447:33470:0216/154002.940692:ERROR:chrome_browser_main_extra_parts_metrics.cc(227)] START: ReportBluetoothAvailability(). If you don't see the END: message, this is crbug.com/1216328.
[33447:33470:0216/154002.940745:ERROR:chrome_browser_main_extra_parts_metrics.cc(230)] END: ReportBluetoothAvailability()
[33447:33447:0216/154004.865275:ERROR:sharing_service.cc(222)] Device registration failed with fatal error
[33447:33447:0216/154007.123963:ERROR:CONSOLE(1)] "syncDetachedTabInformation: The message port closed before a response was received.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154007.125310:ERROR:CONSOLE(1)] "syncDetachedTabInformation: The message port closed before a response was received.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154008.623490:ERROR:CONSOLE(1)] "syncDetachedTabInformation: The message port closed before a response was received.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154008.623862:ERROR:CONSOLE(1)] "syncDetachedTabInformation: The message port closed before a response was received.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154008.624113:ERROR:CONSOLE(1)] "syncDetachedTabInformation: The message port closed before a response was received.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154008.624470:ERROR:CONSOLE(1)] "syncDetachedTabInformation: The message port closed before a response was received.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154008.624739:ERROR:CONSOLE(1)] "syncDetachedTabInformation: The message port closed before a response was received.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154008.640810:ERROR:CONSOLE(1)] "syncDetachedTabInformation: The message port closed before a response was received.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154008.641072:ERROR:CONSOLE(1)] "syncDetachedTabInformation: The message port closed before a response was received.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154008.641419:ERROR:CONSOLE(1)] "syncDetachedTabInformation: The message port closed before a response was received.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154008.641535:ERROR:CONSOLE(1)] "syncDetachedTabInformation: The message port closed before a response was received.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154012.938689:ERROR:CONSOLE(1)] "sendInitDataToInjectedScript: Could not establish connection. Receiving end does not exist.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154012.939712:ERROR:CONSOLE(1)] "sendInitDataToInjectedScript: Could not establish connection. Receiving end does not exist.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154024.649954:ERROR:CONSOLE(1)] "sendInitDataToInjectedScript: The message port closed before a response was received.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154032.656772:ERROR:CONSOLE(1)] "sendInitDataToInjectedScript: Could not establish connection. Receiving end does not exist.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)
[33447:33447:0216/154032.693563:ERROR:CONSOLE(1)] "sendInitDataToInjectedScript: Could not establish connection. Receiving end does not exist.", source: chrome-extension://mpognobbkildjkofajifpdfhcoklimli/bundle.js (1)

I don’t really know what this means but I really fell my PC continues to be very slow.
Any tips ?

What happens when you just start it without DRI_PRIME=1
just
vivaldi-stable
in a terminal?

Same errors?

The errors are about bluetooth availability … something I would not expect a browser to check
and one particular extension
you should probably know what that is and what it is for
and try to disable it

in that case it gives only one error
[4470:4470:0100/000000.745757:ERROR:sandbox_linux.cc(377)] InitializeSandbox() called with multiple threads in process gpu-process.

I can only tell you that I get the very same result when I run google-chrome and chromium from terminal
… it says “Error …” but it doesn’t seem to be an actual error since both work just fine.

I don’t have or use vivaldi but I guess it’s based upon chrome and thus the same “Error …” is to be expected.