Odroid C2 4 port USB hub and USB devices

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hhh1
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Odroid C2 4 port USB hub and USB devices

Unread post by hhh1 » Sat Jun 24, 2017 8:37 pm

Has anyone tried to connect 4 usb devices to Odroid C2 hub?
I've tried to connect 4 different Huawei/LTE USB modems and on 3rd modem hub stops responding with

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Jun 19 22:58:55 port-9f3714 kernel: usb 1-1.3: new high-speed USB device number 6 using dwc_otg
Jun 19 22:58:56 port-9f3714 kernel: usb 1-1.3: unable to read config index 0 descriptor/all
Jun 19 22:58:56 port-9f3714 kernel: usb 1-1.3: can't read configurations, error -71
Jun 19 22:58:56 port-9f3714 kernel: hub 1-1:1.0: cannot disable port 3 (err = -71)
Jun 19 22:58:56 port-9f3714 kernel: hub 1-1:1.0: cannot reset port 3 (err = -71)
Jun 19 22:58:56 port-9f3714 kernel: hub 1-1:1.0: cannot reset port 3 (err = -71)
Jun 19 22:58:56 port-9f3714 kernel: hub 1-1:1.0: cannot reset port 3 (err = -71)
or

Code: Select all

Jun 19 23:03:51 port-9f3714 kernel: usb 1-1.4: new high-speed USB device number 15 using dwc_otg
Jun 19 23:03:51 port-9f3714 kernel: usb 1-1.4: unable to read config index 0 descriptor/start: -71
Jun 19 23:03:51 port-9f3714 kernel: usb 1-1.4: can't read configurations, error -71
Jun 19 23:03:51 port-9f3714 kernel: hub 1-1:1.0: cannot disable port 4 (err = -71)
Jun 19 23:03:51 port-9f3714 kernel: hub 1-1:1.0: cannot reset port 4 (err = -71)
Jun 19 23:03:51 port-9f3714 kernel: hub 1-1:1.0: cannot reset port 4 (err = -71)
Jun 19 23:03:51 port-9f3714 kernel: hub 1-1:1.0: cannot reset port 4 (err = -71)
Jun 19 23:03:51 port-9f3714 kernel: hub 1-1:1.0: cannot reset port 4 (err = -71)
Jun 19 23:03:51 port-9f3714 kernel: hub 1-1:1.0: cannot reset port 4 (err = -71)
Jun 19 23:03:51 port-9f3714 kernel: hub 1-1:1.0: Cannot enable port 4.  Maybe the USB cable is bad?
So the real number of USB devices it can handle is 2?

ps
I used 5v 2A power.

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Re: Odroid C2 4 port USB hub and USB devices

Unread post by odroid » Mon Jun 26, 2017 9:46 am

Change usbmulticam kernel option to "true" in boot.ini file.
https://github.com/mdrjr/c2_bootini/blo ... t.ini#L125
It will enable the "USB quirks" feature and it can solve your issue hopefully.

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