On Tue, 02 Feb 2021 19:52:57 +0100, Peter Allen wrote: > > Thank you for taking the time to look at this. > I've tried your latest 5.12 branch, and sure enough it works perfectly without > any problems. > So I'm really happy. Thank you! Good to hear! Takashi > > Pete > > On Mon, 1 Feb 2021, 14:24 Takashi Iwai, <tiwai@xxxxxxx> wrote: > > On Sat, 30 Jan 2021 09:30:50 +0100, > Peter Allen wrote: > > > > I have a NUX Mighty Plug guitar effects which has a USB Audio interface. > > Unfortunately it doesn't work in Linux, and I'd love to fix it. > > It gets registered with Alsa, except it ends up without any valid sample > > rates (by the look of it due to a buggy clock source descriptor). > > > > This is on Ubuntu-Studio 20.04 LTS _Focal Fossa with kernel > > 5.4.0-62-lowlatency > > on a HP Omen 15 with i5-7300HQ > > > > I don't know what I'm doing (but did a little module development rather > a > > long time ago in the 2.2 days :-)) Help is greatly appreciated. > > > > When plugged in I get: > > [12476.413792] usb 1-1: New USB device found, idVendor=1fc9, > > idProduct=8260, bcdDevice= 1.00 > > [12476.413797] usb 1-1: New USB device strings: Mfr=1, Product=2, > > SerialNumber=3 > > [12476.413800] usb 1-1: Product: MIGHTY PLUG USB > > [12476.413804] usb 1-1: Manufacturer: NUX > > [12476.413807] usb 1-1: SerialNumber: 2007151403 > > [12476.444988] usb 1-1: __uac_clock_find_source(): selector reported > > illegal value, id 40, ret 0 > > [12476.444992] usb 1-1: parse_audio_format_rates_v2v3(): unable to find > > clock source (clock -22) > > [12476.445413] usb 1-1: __uac_clock_find_source(): selector reported > > illegal value, id 40, ret 0 > > [12476.445479] usb 1-1: __uac_clock_find_source(): selector reported > > illegal value, id 40, ret 0 > > [12476.447095] usb 1-1: __uac_clock_find_source(): selector reported > > illegal value, id 40, ret 0 > > [12476.447098] usb 1-1: parse_audio_format_rates_v2v3(): unable to find > > clock source (clock -22) > > [12476.447459] usb 1-1: __uac_clock_find_source(): selector reported > > illegal value, id 40, ret 0 > > [12476.447684] usb 1-1: __uac_clock_find_source(): selector reported > > illegal value, id 40, ret 0 > > [12476.450397] usbcore: registered new interface driver snd-usb-audio > > This might be covered by the recent fixes for 5.12 kernel, found in > for-next branch of my sound git tree. > git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git > > Also, as both playback and capture streams are ASYNC, those might be > supposed to be running in the implicit feedback. With the very latest > kernel, this can be enabled via implicit_fb=1 module option. If this > works better, we can set up a static quirk table entry for the device, > too. > > Takashi > >
