On Friday, 4 July 2025 14:44:35 British Summer Time John Blinka wrote: > On Thu, Jul 3, 2025 at 12:57 PM Michael <confabul...@kintzios.com> wrote:
[snip ...] > > and in particular boot with Ubuntu, or whichever liveUSB allows your audio > > to work and run: > > > > lsmod > > There are 39 modules whose names begin with “snd_” or “sound”. The list is > the same on the working ubuntu-25 and the non-working gentoo kernel 6.12 > systems. OK, it seems your kernel is not missing any modules. [snip ...] > > Finally, you can compare Ubuntu's output of 'zcat /proc/config.gz' with > > the > > audio modules you have enabled in your kernel and add what's relevant to > > your hardware. > > There are a *lot* of audio modules in use according to lsmod. But they’re > the same in both working ubuntu and non-working gentoo. It’s difficult to > compare the working ubuntu config (based on a 6.14 kernel) and the > non-working gentoo config (based in a 6.12 kernel). But I’m thinking that > the identical lsmod output implies that the gentoo config supports the > necessary hardware. Yes, unless some drivers have been built in the kernel on one OS and not the other. Please note what Javier posted just now. > I appreciate your ideas! You're welcome, but let's see if you can get your audio working first. :-) > I’ve noticed that using ubuntu’s /etc/modprobe.d/alsa-base.conf was crucial > to successful sound in gentoo with a 6.6 kernel. Given that I appear to be > using the same kernel modules as ubuntu, and the same firmware and topology > files, perhaps my problem lies in how modprobe.d operates? Unfortunately, I > do not understand what ubuntu is doing with alsa-base.conf. > > John Blinka A file '/etc/modprobe.d/something.conf' can be set up to enable/disable options when loading different modules. You can check a available options for a module by running: modinfo <module_name> Ubuntu may have scripted generic options in there, but you'll need to examine them or try them to see what they do. Another thing to check is if your default audio card is switched over when the hardware is initialised by udev. Typically you may find the MoBo audio card takes over from the discrete audio card and vice versa. In this case it could be HDMI works but nothing else does. You can declare which card is set as the default, by e.g. changing the card index order: options snd_hda_intel index=1,0 Again compare Ubuntu and Gentoo 'aplay -L' output to spot any differences. HTH.
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