LinuxMusicians

I guess it requires implicit feedback quirk, just like SSL2+
https://git.kernel.org/pub/scm/linux/ke ... 308f7ffcbf

Also I doubt that 18i8 will work correctly with my patch. I should probably add additional filtering of sample rates on the output interface for this device.

Updated patch. Added Scarlett 18i8 3rd Gen. Also slightly changed the way to get altsetting.

Mr (or Mrs) Puleglot. Thank you so much for your help with this. If there's any other testing I can help with please ask. Oh, just remembeerd - I get a lot of "unable to change format on ep #82" messages when the usb-audio module is loaded, but it doesn't seem to affect anything. Thanks for testing...

These errors: "Unable to change format on ep ..." should be fixed by the following patch:
https://git.kernel.org/pub/scm/linux/ke ... 80c63bf77f
But it is not fixing all the problems with implicit feedback AFAIS.

Patch for pcm.c with added check for subs->interface >= 0. @bluebell could you test it?

Hrmmm.. quirks-table.h looks good. Please try attached patch. With the new patch you should see "Keep Interface" mixer control via amixer, eg: $ amixer -c USB controls numid=1,iface=CARD,name='Keep Interface' And this will be an evidence that you indeed booted the right kernel. Also could you attach...

Could you attach sound/usb/quirks-table.h from your kernel source tree? I suspect that something went wrong with the patching. I can't seem to get a list of contents using your "amixer -c" command. What version of the kernel you are using? keep_iface first appeared in 4.18. But anyway we can ignore ...

@Drumfix maybe you need a check before calling usb_set_interface() ?

Would it be best to start a new thread do you think. I mentioned it on an existing thread as it seemed to be the same problem. Well, this thread started as a question about QjackCtl. But on the other hand these problems with QjackCtl could be also related to the lack of the capture support for Saff...

Also note, that due to the fact that playback and capture endpoints on this card share the same interface, you might need to enable "Keep Interface" option with amixer . For example if my IIc card needed "Keep Interface" to be enabled (it doesn't need it actually), I would do the following: $ aplay ...

boik wrote: ↑

Mon May 04, 2020 1:25 pm

The first one (quirks-table) applied OK.

And please revert this change and make sure that quirks-table.h contains only one entry with USB_DEVICE(0x1235, 0x0010) before applying my patch.

Please try attached patch.

Edit: viewtopic.php?f=27&t=21426

boik wrote: ↑

Mon May 04, 2020 1:25 pm

The first one (quirks-table) applied OK. the second one (quirks.c) said that it was a duplicate...

The patch from my github link is already in mainline kernel. You don't need to apply it. I'll attach patch in this topic shortly.

Hello. I'm in the same boat as you with my Saffire 6. I've got a horrible feeling that the USB 1.1 version (vendor code 1235:0010) doesn't work with Linux, but that the USB 2.0 version (vendor code 1235:8008) does. work. AFAIS, capture support for Saffire 6 (1235:0010) was never implemented [*]. If...