Why is the sound output to speakers and headphones at the same time?

Question

HTML

I have a Lenovo B590 laptop. When headphones are connected, sound is output from the headphones and the built-in speakers. How can this be fixed?

Answer 1

"Undesirable" is incorrect. Whether you want to join or not. It's just that your custom font won't work in most mailers, that's all. A gradient can be made into a picture, for example.
templates.mailchimp.com/resources/email-client-css... - here's the support for css properties. You can also download their templates there and see how they are arranged.
For layout, I recommend using this framework: foundation.zurb.com/emails.html

Answer 2

You can forget about the gradient.
Attach the font using the link tag. The import option is cut at the send level in many services. Along the way, write conditional comments for Outlook indicating the default font, since the included font will give times in Outlook. It will not work everywhere, but tests will show the big picture.
The zurb recommended above is not recommended. This is a monster that is not worth working without a deep understanding of the layout of letters.

Answer 3

Perhaps the BIOS is set to AC97 mode, switch to HD Audio (or turn it on). Realtek also in some models has a checkbox something about "use each connector as a separate device."

Answer 4

Either there is a problem with the driver - download the native one from the Laptop site
. Or the connector is faulty - when you connect the headphones, the switch does not work and does not turn off the speakers.