USB-C dock usb devices don't always work


#1

I’m using the USB-C docking station with a Chromebook. Fairly frequently, when I plug the dock in, the keyboard and mouse that I have plugged into the dock don’t work–I can see the cursor, but the mouse doesn’t move. This obviously renders the dock somewhat useless. Plugging and unplugging the devices from the dock doesn’t work, although it does sometimes make the video go blank. Unplugging and plugging the dock from the Chromebook has always gotten it back, but sometimes it takes many tries.

Is this something that you are aware of? Any ideas?


#2

BTW, here is a dmesg log of the thing failing to scan the USB bus:

[812786.159290] [drm] DP Port2 lanes reversed
[812790.308867] usb 1-5.1: device descriptor read/all, error -110
[812791.309651] hub 1-5:1.0: cannot disable port 1 (err = -110)
[812792.310434] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812793.311297] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812794.312091] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812794.454196] PDLOG 2016/06/09 15:29:15.206 P1 SNK (not charging) Charger Type-C 5000mV max 5000mV / 3000mA
[812794.460427] PDLOG 2016/06/09 15:29:15.246 P1 Disconnected
[812794.466618] PDLOG 2016/06/09 15:29:15.432 P1 SNK (not charging) Charger VBUS 5000mV max 5000mV / 500mA
[812794.472827] PDLOG 2016/06/09 15:29:15.447 P1 Disconnected
[812794.479028] PDLOG 2016/06/09 15:29:16.077 P1 SNK Charger ??? 5052mV max 5000mV / 500mA
[812794.485277] PDLOG 2016/06/09 15:29:16.091 P1 SNK Charger ??? 5115mV max 5000mV / 1500mA
[812794.491451] PDLOG 2016/06/09 15:29:16.093 P1 SNK Charger ??? 5159mV max 5000mV / 3000mA
[812794.498048] PDLOG 2016/06/09 15:29:16.112 P1 SNK Charger ??? 4832mV max 20000mV / 3000mA
[812794.504739] PDLOG 2016/06/09 15:29:18.266 P1 SNK Charger PD 1610mV max 20000mV / 3000mA
[812794.510483] PDLOG 2016/06/09 15:29:18.282 P0 Event 02 (0000) ]
[812794.517128] PDLOG 2016/06/09 15:29:22.527 P1 Disconnected
[812794.523667] PDLOG 2016/06/09 15:29:25.969 P1 SNK (not charging) Charger VBUS 5000mV max 5000mV / 500mA
[812794.530510] PDLOG 2016/06/09 15:29:25.983 P1 Disconnected
[812794.537504] PDLOG 2016/06/09 15:29:26.611 P1 SNK Charger ??? 2674mV max 5000mV / 500mA
[812794.544321] PDLOG 2016/06/09 15:29:26.624 P1 SNK Charger ??? 5115mV max 5000mV / 1500mA
[812794.551191] PDLOG 2016/06/09 15:29:26.647 P1 SNK Charger ??? 4958mV max 20000mV / 3000mA
[812794.558171] PDLOG 2016/06/09 15:29:29.612 P1 SNK Charger PD 18852mV max 20000mV / 3000mA
[812795.312926] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812796.313723] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812796.313741] hub 1-5:1.0: Cannot enable port 1. Maybe the USB cable is bad?
[812797.314484] hub 1-5:1.0: cannot disable port 1 (err = -110)
[812798.316331] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812799.317158] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812800.317953] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812801.318836] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812802.319553] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812802.319563] hub 1-5:1.0: Cannot enable port 1. Maybe the USB cable is bad?
[812803.320352] hub 1-5:1.0: cannot disable port 1 (err = -110)
[812804.321139] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812805.121615] cros-ec-dev cros-ec-dev.1: cros_ec_pd_get_polarity: port:1 enabled:1, role:0, polarity:1, state:8
[812805.121626] [drm] DP Port2 lanes reversed
[812805.321941] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812806.322956] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812807.323577] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812808.324448] hub 1-5:1.0: cannot reset port 1 (err = -110)
[812808.324459] hub 1-5:1.0: Cannot enable port 1. Maybe the USB cable is bad?
[812809.325254] hub 1-5:1.0: cannot disable port 1 (err = -110)
[812809.325308] hub 1-5:1.0: unable to enumerate USB device on port 1
[812810.326071] hub 1-5:1.0: cannot disable port 1 (err = -110)
[812815.331043] hub 1-5:1.0: hub_port_status failed (err = -110)
[812820.335231] hub 1-5:1.0: hub_port_status failed (err = -110)
[812825.339191] hub 1-5:1.0: hub_port_status failed (err = -110)
[812830.343262] hub 1-5:1.0: hub_port_status failed (err = -110)
chronos@localhost / $


#3

Hello Ted,

Sorry to hear about this issue. Can you tell me which USB-C dock you have? We have two models. The UD-ULTCDL and the UD-CA1.

Thank you,
Joshua Henry
Plugable Technologies


#4

Oops, sorry. It’s the UD-CA1.


#5

Thanks for the information. I have handed this issue over to Patric who is our expert on the UD-CA1 and he should be in touch again shortly.


#6