[Bug 218544] not enough bandwidth, synaptics hi-res audio duplex audio

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218544

--- Comment #6 from Ian Malone (ibmalone@gmail.com) ---
Created attachment 305938
  --> https://bugzilla.kernel.org/attachment.cgi?id=305938&action=edit
/sys/kernel/debug/usb/devices other devices disabled

Disabling the onboard camera, bluetooth and (other bus, but for good measure)
qmi_wwan:
# echo 0 > /sys/bus/usb/devices/1-1.4/bConfigurationValue
# echo 0 > /sys/bus/usb/devices/1-1.6/bConfigurationValue
# echo 0 > /sys/bus/usb/devices/2-1.4/bConfigurationValue

(/sys/kernel/debug/usb/devices attached) sadly the same problem. I've also
tried blacklisting the modules for the other devices (uvcvideo, btusb,
qcserial, qmi_wwan) with no change. The rear port appears to be the other bus,
but using that also has the same result:
# lsusb -t
/:  Bus 001.Port 001: Dev 001, Class=root_hub, Driver=ehci-pci/3p, 480M
    |__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/6p, 480M
        |__ Port 004: Dev 003, 12M
        |__ Port 006: Dev 004, 480M
/:  Bus 002.Port 001: Dev 001, Class=root_hub, Driver=ehci-pci/3p, 480M
    |__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/8p, 480M
        |__ Port 001: Dev 004, If 0, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 001: Dev 004, If 1, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 001: Dev 004, If 2, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 001: Dev 004, If 3, Class=Human Interface Device,
Driver=usbhid, 12M
        |__ Port 004: Dev 003, 480M

(All three devices are onboard, so difficult to remove)

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