@kaihengfeng, Sure. I'm attaching the "dmesg -H" output from a run that worked.
My odds of success lately have been a bit better than "rarely works", but I still often need a few retries to get it working. A "retry" could mean unplugging and re-plugging the hub or HDMI cable, or simply suspending and resuming the laptop. HDMI port detection has been flaky on most kernels I've tried. This means that sometimes I will get neither video nor audio, and will have to retry. Other times, I will get video but no audio. What happened *this* time was that I had to retry twice to get video, but the first successful attempt which had video, also had audio. ** Attachment added: "working-dmesg" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879401/+attachment/5385431/+files/working-dmesg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879401 Title: [XPS 13 7390 2-in-1, Intel Icelake HDMI, Digital Out, HDMI] sound rarely works To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879401/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
