Re: [REGRESSION] Audient EVO4 hardware volume control now requires quirk

[Faaris Ansari <faaris.ansari@gmail.com>]

Thanks Takashi and Sasha,


> Faaris, please let us know if this (or previous) one actually works
> for you.  Once after confirmation, I'll submit the proper patch for
> upstream.

I tested your latest patch where you removed the quirk for the iD14 
alone, and instead set it for all Audient devices.

I can confirm that this has indeed fixed the problem, and I can now 
correctly control my hardware volume without problems, thank you!


> ... or if you have a chance to test Christian's patch set and verify
> whether the problem is fixed there, we can avoid other changes:
>    https://lore.kernel.org/20260919151840.24371-1-arc@gmx.li
I tested Christian's patch alone, without any other changes. The problem 
still occurred with those patches.

This was also noted by Christian:

> As a matter of fact, I made a similar
> observation to yours when testing the patch set on the 'sound' kernel tree
> and the (very sporadic) issue did not disappear after applying the
> patches.
And further discussion below:

https://lore.kernel.org/all/CANBVYRAr8iFGFDgdTcDXuQyXt5M4TddZetsG9o1wbFao03R0yw@mail.gmail.com/


However, using both patches together (as well as a small patch for 
alsa-ucm-conf) has made my interface work very well - I'm very happy 
with these changes :)


Thank you for your work, Sasha, Takashi, and Christian,

Faaris


On 29/09/2026 14:14, Takashi Iwai wrote:
> On Tue, 29 Sep 2026 14:38:03 +0200,
> Takashi Iwai wrote:
>> On Tue, 29 Sep 2026 07:58:03 +0200,
>> Takashi Iwai wrote:
>>> On Tue, 29 Sep 2026 00:39:05 +0200,
>>> Sasha Levin wrote:
>>>>> [   80.940668] usb 3-1: cannot set ctl value: req = 0x1, wValue = 0x203,
>>>>> wIndex = 0xa00, type = 4, data = 0x0/0x81
>>>> [...]
>>>>> numid=4,iface=MIXER,name='EVO4  Playback Volume'
>>>>>     ; type=INTEGER,access=rw---R--,values=4,min=0,max=254,step=0
>>>>>     : values=182,182,0,0
>>>> Thanks, that narrows it down.
>>>>
>>>> Every failure is SET_CUR of the Volume control on feature unit 10, channel 3
>>>> (wValue 0x0203, wIndex 0x0a00). That unit is 'EVO4  Playback Volume' and
>>>> advertises read/write volume on all four channels. mixer_ctl_feature_put()
>>>> writes channels 1 and 2, then returns the channel 3 error, so the hardware
>>>> volume changes while userspace is told the write failed and adds software
>>>> attenuation on top. Faaris sees the same on 7.3-rc5, so this is a mainline
>>>> regression from 87a6f2fa6e6c ("ALSA: usb-audio: Propagate write errors in
>>>> generic mixer put callbacks").
>>> Right.  So a simple fix would be to just to set the IGNORE_CTL_ERROR
>>> quirk flag like below.  One of iD14 models has already this flag, so
>>> it might be safer to set to all Audient devices.
>> ... and below is such a version to cover all Audient devices:
>>
>> Faaris, please let us know if this (or previous) one actually works
>> for you.  Once after confirmation, I'll submit the proper patch for
>> upstream.
> ... or if you have a chance to test Christian's patch set and verify
> whether the problem is fixed there, we can avoid other changes:
>    https://lore.kernel.org/20260919151840.24371-1-arc@gmx.li
>
>
> Takashi