I can confirm that changing HIBERNATE_MODE to platform does indeed fix it. (And for what it's worth, resuming from when it was left on ACPI, and then suspending (to RAM) and resuming again makes the sound work again)
Could I ask what changing it to platform actually does? -- [Feisty] Inaudible audio upon resuming from suspend-to-disk https://bugs.launchpad.net/bugs/80893 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs