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orielg
3
Dec 27, 2017
@Michael_Grace I just received my O2+SDAC and there is a severe problem under Linux: When I connect the device while playing something it works as expected but after pausing for ~30 seconds and then resuming the device isn't recognized anymore. Here is the relevant dmesg output:
[ 4117.173027] usb 3-1.6: new full-speed USB device number 39 using xhci_hcd [ 4117.274996] usb 3-1.6: New USB device found, idVendor=21b4, idProduct=0144 [ 4117.275003] usb 3-1.6: New USB device strings: Mfr=1, Product=3, SerialNumber=0 [ 4117.275008] usb 3-1.6: Product: SDAC [ 4117.275012] usb 3-1.6: Manufacturer: Grace Design [ 4174.324753] usb 3-1.6: reset full-speed USB device number 39 using xhci_hcd [ 4174.404656] usb 3-1.6: device descriptor read/64, error -32 [ 4174.596572] usb 3-1.6: device descriptor read/64, error -32 [ 4174.784557] usb 3-1.6: reset full-speed USB device number 39 using xhci_hcd [ 4174.864473] usb 3-1.6: device descriptor read/64, error -32 [ 4175.056621] usb 3-1.6: device descriptor read/64, error -32 [ 4175.244570] usb 3-1.6: reset full-speed USB device number 39 using xhci_hcd [ 4175.244677] usb 3-1.6: Device not responding to setup address. [ 4175.452699] usb 3-1.6: Device not responding to setup address. [ 4175.660517] usb 3-1.6: device not accepting address 39, error -71 [ 4175.740711] usb 3-1.6: reset full-speed USB device number 39 using xhci_hcd [ 4175.740890] usb 3-1.6: Device not responding to setup address. [ 4175.948616] usb 3-1.6: Device not responding to setup address. [ 4176.156553] usb 3-1.6: device not accepting address 39, error -71 [ 4176.157021] usb 3-1.6: USB disconnect, device number 39 [ 4176.236418] usb 3-1.6: new full-speed USB device number 40 using xhci_hcd [ 4176.316438] usb 3-1.6: device descriptor read/64, error -32 [ 4176.504609] usb 3-1.6: device descriptor read/64, error -32 [ 4176.692430] usb 3-1.6: new full-speed USB device number 41 using xhci_hcd [ 4176.773323] usb 3-1.6: device descriptor read/64, error -32 [ 4176.960420] usb 3-1.6: device descriptor read/64, error -32 [ 4177.148423] usb 3-1.6: new full-speed USB device number 42 using xhci_hcd [ 4177.148520] usb 3-1.6: Device not responding to setup address. [ 4177.356513] usb 3-1.6: Device not responding to setup address. [ 4177.564420] usb 3-1.6: device not accepting address 42, error -71 [ 4177.644410] usb 3-1.6: new full-speed USB device number 43 using xhci_hcd [ 4177.644499] usb 3-1.6: Device not responding to setup address. [ 4177.852501] usb 3-1.6: Device not responding to setup address. [ 4178.060417] usb 3-1.6: device not accepting address 43, error -71 [ 4178.060463] usb 3-1-port6: unable to enumerate USB device
I'm running Ubuntu 16.04 on a Dell XPS 13 9350 and my kernel version is 4.10.0-42-generic #46~16.04.1-Ubuntu. It also worth mentioning that I also own a Udac-3 that works flawlessly, so the problem is with the device itself. Do you have any ideas?
Thank you
ramblingenzyme
10
Jun 6, 2018
orielgHey, I've finally managed to track down the issue. The SDAC doesn't seem to handle USB suspend, so I've had to turn off USB autosuspend.
You can give this a go by changing the value in `/sys/module/usbcore/parameters/autosuspend` to -1.
If this works, you can edit your GRUB config to add `usbcore.autosuspend=-1` to GRUB_CMDLINE_LINUX. This will disable suspending all USB devices however, but I think there are ways to set this per device, but I haven't looked into it.
Edit: Sorry for all the replies, Massdrop wasn't showing the comment being posted after submitting. Also, you can blacklist the USB id if you're running laptop-mode-tools or tlp.
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