Hi, We are running Ubuntu 16.04 with B210. We've noticed that the B210 keep on disconnecting after some arbitrary time. It could disconnect within minutes after it's programmed or disconnect the next day.
Below is what we're seeing. Any idea what could cause this? I do want to make a note that we did make a mod to the board in order to allow us to use the B210 as it fails to be detected on cold boot unless we push S700. Hence, we removed the capacitor C716 and S700 and replaced with a signal that switches between 0V and 1.8V to give us remote access to reset the board (mimic S700's functionality). We left the pullup resistor to 1.8V. I have verified that when the USB disconnect happens, it is not due to the signal for reset as I am probing that signal. Thanks! Dec 19 10:07:58 kernel: [682456.227095] usb 3-2: new high-speed USB device number 3 using xhci_hcd Dec 19 10:07:58 kernel: [682456.367646] usb 3-2: New USB device found, idVendor=2500, idProduct=0020 Dec 19 10:07:58 kernel: [682456.367652] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Dec 19 10:07:58 kernel: [682456.367655] usb 3-2: Product: WestBridge Dec 19 10:07:58 kernel: [682456.367658] usb 3-2: Manufacturer: Cypress Dec 19 10:07:58 kernel: [682456.367661] usb 3-2: SerialNumber: 0000000004BE Dec 19 10:07:58 mtp-probe: checking bus 3, device 3: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2" Dec 19 10:07:58 mtp-probe: bus: 3, device: 3 was not an MTP device Dec 19 10:07:58 kernel: [682456.715162] xhci_hcd 0000:00:14.0: Cannot set link state. Dec 19 10:07:58 kernel: [682456.715176] usb usb4-port2: cannot disable (err = -32) Dec 19 10:07:58 kernel: [682456.769802] usb 4-2: USB disconnect, device number 3 Dec 19 10:08:29 kernel: [682487.411433] usb 3-2: USB disconnect, device number 3 Dec 19 10:08:29 kernel: [682487.710679] usb 3-2: new high-speed USB device number 4 using xhci_hcd Dec 19 10:08:30 kernel: [682487.851236] usb 3-2: New USB device found, idVendor=2500, idProduct=0020 Dec 19 10:08:30 kernel: [682487.851241] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Dec 19 10:08:30 kernel: [682487.851245] usb 3-2: Product: WestBridge Dec 19 10:08:30 kernel: [682487.851248] usb 3-2: Manufacturer: Cypress Dec 19 10:08:30 kernel: [682487.851250] usb 3-2: SerialNumber: 0000000004BE Dec 19 10:08:30 mtp-probe: checking bus 3, device 4: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2" Dec 19 10:08:30 mtp-probe: bus: 3, device: 4 was not an MTP device
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