Hello, Having gone through Debian's ReportBug system, I am unsure which packages the issue is coming from hence the email contact.
The problem is quite straightforward. After the last update from Linux Kernel 4.19.0-10amd64 to 4.19.0-11amd64 on Debian Buster, there seems to be a sound input/output issue with the Headphone Jack port. The sound comes out perfectly well through the speakers, however there is a complete loss of sound output and voice input when using headphones/earphones. Reverting back to Linux Kernel 4.19.0-10amd64 when in Grub fixes the issue, therefore it seems to be related to the latest update? Best regards, Edouard H.