Exactly the same problem with Samsung Notebook 9 Pro (np930mbe-k04us) which also has an ALC298.
Headphones are working with model=mono-speakers. I attached my Realtek dump. I'm also soliciting the arch forum for help (I'm running arch): https://bbs.archlinux.org/viewtopic.php?pid=1897858 ** Attachment added: "RtHDDump.txt" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1851518/+attachment/5353056/+files/RtHDDump.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1851518 Title: [950SBE/951SBE, Realtek ALC298, Speaker, Internal] No sound on internal speakers, very very quiet on headphones To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1851518/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs