magictedddy wrote: 
> Hi,
> 
> our player gets no IP with 3 USB Dongles
> 
> 
> 2 like this one 
> 
> Bus 003 Device 004: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS
> 802.11n 
> and
> Bus 003 Device 003: ID 0bda:8172 Realtek Semiconductor Corp. RTL8191SU
> 802.11n 
> I see the DHCP request and offer 
> 
> 
> > 
Code:
--------------------
  >   >  
  > Jun 3 13:57:33 dhcpd                DHCPOFFER on 192.168.12.98 to 
00:9e:95:9f:14:e7 via re1_vlan1
  > Jun 3 13:57:33 dhcpd                DHCPDISCOVER from 00:9e:95:9f:14:e7 via 
re1_vlan1
  > Jun 3 13:57:30 dhcpd                DHCPOFFER on 192.168.12.98 to 
00:9e:95:9f:14:e7 via re1_vlan1
  > Jun 3 13:57:30 dhcpd                DHCPDISCOVER from 00:9e:95:9f:14:e7 via 
re1_vlan1
  > Jun 3 13:57:07 dhcpd                DHCPOFFER on 192.168.12.98 to 
00:9e:95:9f:14:e7 via re1_vlan1
  > Jun 3 13:57:07 dhcpd                DHCPDISCOVER from 00:9e:95:9f:14:e7 via 
re1_vlan1
  > Jun 3 13:56:47 dhcpd                DHCPOFFER on 192.168.12.98 to 
00:9e:95:9f:14:e7 via re1_vlan1
  > Jun 3 13:56:47 dhcpd                DHCPDISCOVER from 00:9e:95:9f:14:e7 via 
re1_vlan1
  > Jun 3 13:56:44 dhcpd                DHCPOFFER on 192.168.12.98 to 
00:9e:95:9f:14:e7 via re1_vlan1
  > Jun 3 13:56:44 dhcpd                DHCPDISCOVER from 00:9e:95:9f:14:e7 via 
re1_vlan1
  > 
--------------------
> >  
> A 3rd Stick is working but is sometimes stuttering an needs to be
> replaced
> 
> Bus 003 Device 005: ID 148f:5370 Ralink Technology, Corp. RT5370
> Wireless Adapter
> 
> WLan works fine the AP is near by on free channel, DHCP works fine.
> On my Win7 PC all the USB Dongles are working fine with the DHCP
> server of pfSense.
> Is this a known issue?
> 
> -teddy

I use the EDIMAX EW-7811Un that is based on the Realtek RTL8188CUS and
it works fine.  But I have seen this problem before when I was running a
hostapd access point on a laptop.  It was hit and miss, so I just
stopped using the laptop setup(it was an experiment anyway).   With my
wireless routers, I've never had a problem.

One thing you can check.  Make sure that 

/etc/modprobe.conf    has the following line in it.
options 8192cu rtw_power_mgnt=0 rtw_enusbss=0


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