there are some problems about ev3 use USB hub

[zzd121333]

I made a wifi video car with ev3. ev3 have only one USB port , so I have to use usb hub to connect WiFi dongle and camer. I build a bin have uvc driver. and camer work normol. I use andriod phone to receive video through wifi. and control the car by phone too.
it look so perfect.
but when ev3 use Usb hub, it will stop for a while about per 10S.
And i find some kernel err:
Jan 25 12:16:31 arago user.warn kernel: lms_uart request interrupt failed for UART1^M
Jan 25 12:16:32 arago user.warn kernel: HER_AL initialisation passed
Jan 25 12:16:32 arago user.info kernel: zero gadget: Red nose, version: 31jan2011->
Jan 25 12:16:32 arago user.info kernel: zero gadget: zero ready
Jan 25 12:16:32 arago user.err kernel: da8xx_interrupt 512: Unhandled USB IRQ 00010000
Jan 25 12:16:34 arago user.info LMS2012: VM Started
Jan 25 12:16:51 arago user.err kernel: da8xx_interrupt 512: Unhandled USB IRQ 00090000
Jan 25 12:17:45 arago user.err kernel: da8xx_interrupt 512: Unhandled USB IRQ 00090000
Jan 25 12:18:09 arago user.err kernel: da8xx_interrupt 512: Unhandled USB IRQ 00090000
Jan 25 12:20:20 arago user.err kernel: da8xx_interrupt 512: Unhandled USB IRQ 00090000

I am poor in english,I hope everybody can understand what I mean and help me to solve this problem.




photos : http://xiangce.baidu.com/picture/album/ ... 4bc1789cb6
my test video : http://v.youku.com/v_show/id_XNjQ4Njk5ODA0.html

[mightor]

My guess is that you are drawing too much power from your EV3's USB port. Do you get the same issue with a powered USB hub?

= Xander