Hello Geoffrey, On Tue, 15 Oct 2019 00:10:28 +1030 "Geoffrey D. Bennett" <g@xxxxx> wrote: > Hi wwp, > > On Sun, Oct 13, 2019 at 10:20:30AM +0200, wwp wrote: > > Hello, > > > > I've recently bought a Focusrite Scarlett 18i8 3rd Gen audio interface, > > great device, but in CentOS 7, with either the available 3.x or 4.x > > kernels, the device just appears in the available Alsa devices, but no > > mixer is available, the device direct hardware monitor output is also > > not working (it is, by default, and works well in Windows, but I > > presume that w/ no mixer support in Alsa, it's expected that nothing > > works). I'm able to bound I/O ports in QJackCtl but nothing goes out of > > the device. > > Is any of the class-compliant functionality (play/record) working at > all in CentOS 7? I would expect that out of the box you should be able > to get standard ALSA/PulseAudio apps working for I/O. I tried, nothing, maybe not tried right or enough. > > Of course, adding the 0x1235:8214 USB ID to the quirks just doesn't > > work. I presume there's more work like the patch submitted here (I saw > > the archives) in the "[PATCH RFC V2] ALSA: usb-audio: Scarlett Gen 2 > > mixer interface" mail thread? > > Yes, there would definitely be more work to do along those lines. If > we're lucky, the protocol is basically the same as 2nd gen and just > extended for the additional features in the 3rd gen. FWIW, I haven't > heard of anyone starting that work. > > > Do you it is worth trying applying that 2nd Gen patch to one of the v4 > > kernel available for CentOS 7, adding the 3rd Gen quirks and see how it > > behaves? Or is there already progress on supporting the 3rd Gen one too? > > I doubt that it would do much useful beyond letting you know if it > accepts the same initialisation sequence as the 2nd gen devices. If > you want to send me (off-list) a wireshark USB capture from 1) the > Windows driver initialising your device and 2) you adjusting settings > in Focusrite Control, I can have a look at it and let you know if it > looks similar to the 2nd gen devices. I tried -> broken pipe. IOW, it doesn't work, not as simple as doing as if the 3rd gen was a 2nd gen. Regards, -- wwp https://useplaintext.email/
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