USB WiFi works only after cold reboot

[Serge Voilokov]

Realtek:

urtwn0: <vendor 0x7392 product 0x7811, class 0/0, rev 2.00/2.00, addr
2> on usbus0
urtwn0: MAC/BB RTL8188CUS, RF 6052 1T1R

From:
https://www.adafruit.com/products/814


On Thu, Nov 19, 2015 at 11:36 PM, Adrian Chadd <adrian.chadd at gmail.com> wrote:
> It looks like it's reading some invalid data via the EEPROM. I've seen
> it do it yet and I haven't sat down to figure it out.
>
> Which device is it?
>
>
> -a
>
>
> On 19 November 2015 at 19:56, Serge Voilokov <serge0x76 at gmail.com> wrote:
>> Hi,
>>
>> I have a problem on Raspberry PI-A with Realtek WiFi adapter.
>> After reboot on watchdog or kernel panic wifi doesn't init properly.
>> Sometimes wlan0 is not created, sometimes ethernet address is
>> ff:ff:ff:ff:ff:ff, firmware loading errors, etc.
>>
>> After cold reboot it works file.
>>
>> How can I avoid the cold reboot?
>> Now on boot I do several attempts of 'usbconfig reset' until wifi
>> starts working.
>> It doesn't seem reliable.
>> Is the other way to make cold reset of usb and/or wifi without rebooting the OS?
>>
>> Thanks,
>> --serge
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