This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-focal -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1917829 Title: alsa/hda: the hdmi audio dosn't work on TGL machines Status in HWE Next: New Status in linux package in Ubuntu: Fix Committed Status in linux-oem-5.10 package in Ubuntu: Invalid Status in linux-oem-5.10 source package in Focal: Fix Committed Status in linux source package in Groovy: Fix Committed Status in linux source package in Hirsute: Fix Committed Bug description: [Impact] On the TGL machines, we plug a dp mst hub to the thunderbolt port, and plug a hdmi/dp monitor to the dp mst hub, then check the gnome-sound-setting, could not find the hdmi/dp audio device. [Fix] backport a patch from upstream, this patch change to assign the pcm slot dynamically on TGL macines. [Test] On 2 lenovo and dell TGL machines, plug dp mst hub and plug 2 monitors to the hub or to the machine hdmi/dp ports, check the gnome-sound-setting, there are 2 hdmi/dp audio devices. and they all could output sound. [Where problems could occur] After this change, the hdmi audio device number starts from 0, 1, ..., while without this change, the hdmi audio device number is fix mapped, it could be 3 or 5 directly. So if there is some userspace applications depends on the fix mapped hdmi audio device, these applicatons could not work on TGL machines. So far, we don't know if those applications exists or not, but I could confirm the ubuntu audio stack builds on the alsa-lib and pulseaudio, this change will not affect the applications based on the alsa-lib and pulseaudio. And I already tested audio functions under ubuntu on the TGL machines, there is no regression. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1917829/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
