** Description changed: - This bug is for tracking purpose. + [Impact] + We had a Dell machine, this machine was enabled with ubuntu 4.4 + kernel before, but recently the hdmi audio on this machine stopped + working with the latest ubuntu 4.4. kernel. The system can't detect + its plugging and can't output sound to it anymore. + + [Fix] + This is because we backported a patch from stable updates, and that + patch is for v5.2 kernel, if we backported it to 4.4 kernel, we need + to do some change, and also we need to backport one more patch from + stabe kernel. + + [Test Case] + Connect a monitor to the machine and boot up, after booting up, we + could see the hdmi audio is found, and play sound to the hdmi audio, + we could hear the sound from monitor. + + + [Regression Risk] + It is possible to make the hdmi audio fail to work after applying this + patchset, like the hdmi audio can't be detected after plugging a hdmi + monitor. But this possibility is very low, we tested the patchset on + many dell and lenovo machines, all worked well.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1895603 Title: alsa/hdmi: the hdmi audio stops working from Ubuntu-4.4.0-155.182 To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1895603/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
