From mboxrd@z Thu Jan  1 00:00:00 1970
From: JIN Haozhun <genezetta@gmail.com>
Date: Thu, 01 Mar 2012 23:56:33 +0800
Subject: [ath9k-devel] ath9k_htc compatibility issue with virtualbox
Message-ID: <4F4F9C31.6070006@gmail.com>
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To: ath9k-devel@lists.ath9k.org

Hi everyone,

I read from Internet and archive of this mail list that TP-Link WN821Nv3 
(using Atheros AR7010+AR9287) can't work. And that mail suggest this 
issue related to virtualbox being used. I have come across the same problem.

Tested the device on Debian without using virtualbox, and it works fine. 
Tested the device on Debian using virtualbox, got the following in 
/var/log/syslog

Mar  1 23:45:47 gene-d-laptop kernel: [   98.212097] usb 2-2: USB 
disconnect, device number 3
Mar  1 23:45:51 gene-d-laptop kernel: [  102.654780] usb 1-1: new 
high-speed USB device number 2 using ehci_hcd
Mar  1 23:45:52 gene-d-laptop kernel: [  103.279004] usb 1-1: New USB 
device found, idVendor=0cf3, idProduct=7015
Mar  1 23:45:52 gene-d-laptop kernel: [  103.279014] usb 1-1: New USB 
device strings: Mfr=16, Product=32, SerialNumber=48
Mar  1 23:45:52 gene-d-laptop kernel: [  103.279020] usb 1-1: Product: UB95
Mar  1 23:45:52 gene-d-laptop kernel: [  103.279025] usb 1-1: 
Manufacturer: ATHEROS
Mar  1 23:45:52 gene-d-laptop kernel: [  103.279030] usb 1-1: 
SerialNumber: 12345
Mar  1 23:45:52 gene-d-laptop kernel: [  103.597849] usb 1-1: ath9k_htc: 
Transferred FW: htc_7010.fw, size: 72992
Mar  1 23:45:53 gene-d-laptop kernel: [  104.596310] ath9k_htc 1-1:1.0: 
ath9k_htc: Target is unresponsive
Mar  1 23:45:53 gene-d-laptop kernel: [  104.596328] Failed to 
initialize the device
Mar  1 23:45:53 gene-d-laptop kernel: [  104.605694] ath9k_htc: probe of 
1-1:1.0 failed with error -22

There are also several reports on the internet.

In some cases, due to company policy, I can't use linux without 
virtualization.

Does any one know how this can be solved? Or any work around? Is this a 
bug in Virtualbox USB or in ath9k_htc?

Thank you.
Haozhun