Hi, using the Plantronics DA45 Headset Adapter leads to many lines of cannot get freq at ep 0x4 and cannot get freq at ep 0x84. I found a similar error in the following discussion: http://www.spinics.net/lists/linux-usb/msg125029.html I added the USB ID of the DA45, recompiled the kernel and the messages are gone. I would be happy if you could accept this simple addition made by the following patch: --- a/sound/usb/quirks.c 2015-12-15 06:41:43.000000000 +0100 +++ b/sound/usb/quirks.c 2016-01-28 08:15:35.207785555 +0100 @@ -1122,6 +1122,7 @@ case USB_ID(0x045E, 0x0779): /* MS Lifecam HD-3000 */ case USB_ID(0x04D8, 0xFEEA): /* Benchmark DAC1 Pre */ case USB_ID(0x074D, 0x3553): /* Outlaw RR2150 (Micronas UAC3553B) */ + case USB_ID(0x047F, 0xAA05): /* Plantronics DA45 */ return true; } return false; If there are any questions or something missing, please ask. Thanks in advance. Best denk _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel