I ran into this too when trying to use a USB headset through a hub. >From the description of the kernel config variable, it seems that this problem is only triggered when plugging a USB 1.x sound device into a USB 2.0 hub:
config USB_EHCI_SPLIT_ISO bool "Full speed ISO transactions (EXPERIMENTAL)" depends on USB_EHCI_HCD && EXPERIMENTAL default n ---help--- This code is new and hasn't been used with many different EHCI or USB 2.0 transaction translator implementations. It should work for ISO-OUT transfers, like audio. -- CONFIG_USB_EHCI_SPLIT_ISO not being set causes errors when attempting to play audio through a usb sound device connected via hub https://launchpad.net/bugs/28840 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs