On Wed, 2021-03-24 at 13:49 +0100, Takashi Iwai wrote: > On Wed, 24 Mar 2021 13:03:14 +0100, > Ikjoon Jang wrote: > > > > On Wed, Mar 24, 2021, 7:16 PM Joakim Tjernlund <Joakim.Tjernlund@xxxxxxxxxxxx> > > wrote: > > > > The Logitech devices with 046d:* should be covered generally in > snd_usb_ctl_msg_quirk(), so I guess it's a different problem. > But please check it first. > > > And 20ms can be too long if it's applied to every control transfer. I will > > test the device with shorter delay if you didn't try it before. > > Actually the delay applied to Logitech devices is from 1 to 2ms, not > 20ms. The 20ms delay is applied for some other devices. But if > extending the delay fixes the problem, we need to reconsider the delay > length. > There are a lot of devices USB Audio devices that need that 1-2 ms delay. Have you considered to make this delay generic(for all Audio USB devices) ? Seems like Windows has something similar as these devices just work there. Jocke
