I put the old WIFI card back in the laptop for testing (nb. everything works on Windows, the card does not seem to be defective)
Without MSI: Compiz starts but the desktop is a fixed image. I see no special error in .xsession-errors.
With MSI: Compiz and Unity 3D start.
With or without MSI, Unity 3D starts when putting the other WIFI card in.
I should add that, with or without MSI, I get regular network disconnections (both WIFI cards, the replacement one used to work well with Linux on its former laptop).
So yes, enabling MSI is a win on this laptop. But I don't quite get why the WIFI card can affect the GPU. There might be some other bug somewhere, but I don't know what it is and where I should report it.
I put the old WIFI card back in the laptop for testing (nb. everything works on Windows, the card does not seem to be defective)
Without MSI: Compiz starts but the desktop is a fixed image. I see no special error in .xsession-errors.
With MSI: Compiz and Unity 3D start.
With or without MSI, Unity 3D starts when putting the other WIFI card in.
I should add that, with or without MSI, I get regular network disconnections (both WIFI cards, the replacement one used to work well with Linux on its former laptop).
So yes, enabling MSI is a win on this laptop. But I don't quite get why the WIFI card can affect the GPU. There might be some other bug somewhere, but I don't know what it is and where I should report it.