As of f36afe4 (Linux-libre 3.16.3, eudev 1.9), the codec module of my sound card doesn’t get loaded.
‘lspci’ identifies the device as: --8<---------------cut here---------------start------------->8--- 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04) Subsystem: Dell Device 0492 Flags: bus master, fast devsel, latency 0, IRQ 46 Memory at e2e60000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [100] Virtual Channel Capabilities: [130] Root Complex Link Kernel driver in use: snd_hda_intel --8<---------------cut here---------------end--------------->8--- To work around the problem, I end up running this sequence: --8<---------------cut here---------------start------------->8--- # rmmod snd-hda-codec-analog snd-hda-codec-generic snd-hda-intel snd-hda-controller snd-hda-codec snd-hwdep snd-pcm snd-timer snd soundcore rmmod: ERROR: Module snd_hda_codec_analog is not currently loaded rmmod: ERROR: Module snd_hda_codec_generic is not currently loaded # modprobe snd-hda-codec-idt # udevadm trigger --8<---------------cut here---------------end--------------->8--- Ludo’.