On Sat, 07 Mar 2020 14:00:26 +0100, laurent Trinques wrote: > > Hello, > > sudo dmesg -lerr -lcrit > > [ 0.386478] ACPI BIOS Error (bug): Failure creating named object > [\_SB.I2CA.WT1A], AE_ALREADY_EXISTS (20191018/dswload2-323) (snip) > [ 2.545332] Error: Driver 'pcspkr' is already registered, aborting... All those are irrelevant with the sound problem. > [ 2.572542] snd_hda_intel 0000:23:00.4: no codecs found! I guess this is a known "problem", the strange hardware implementation where exposing the dummy HD-audio bus with non-existing codec. So this can be ignored as well (maybe we can blacklist the PCI ID for ignoring more properly). The real issue is: > [ 8.169209] usb 7-5: cannot get ctl value: req = 0x83, wValue = 0xc00, > wIndex = 0x1300, type = 4 > [ 8.169214] usb 7-5: 19:0: cannot get min/max values for control 12 (id 19) So it's likely a USB audio firmware that doesn't behave correctly as advertised, and we'd need a workaround. Could you give lsusb -v output for this device? Takashi
