#16505: AR9331 USB 2.0 Device issues again on WR710nV1 and other devices
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Reporter: anonymous | Owner: developers
Type: defect | Status: reopened
Priority: high | Milestone: Chaos Calmer (trunk)
Component: kernel | Version: Trunk
Resolution: | Keywords: AR9331 USB2.0 TIMING ISSUES
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Comment (by anonymous):
On WR710N-Models there is a big difference between H/W-Version 1.1(blue
LED) and 1.2(green LED)!
The 1.2 Version mostly works WITHOUT a hub, the 1.1 Version mostly NEVER
works with this stick (without a extra HUB!)
I compared the Hardware inside, and figured out, that on the v1.2
H/W-Version some Resistors are changed on the USB-Parts.
The Main-Problem is NOT Power, it´s the BUS-Communication with usb 2.0
itself with some devices. My bet is a timing problem in the initial-phase
after pluggin in the stick...
One fix vom NBD was a backbort on the 3.10 kernel for while, but this
don´t solve the problems on the older v1.1 Version. This fix worked great
with MR34xx-Series and WDR3600
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Ticket URL: <https://dev.openwrt.org/ticket/16505#comment:15>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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