Author Topic: TP-LINK TL-WN721N wireless adapter [SOLVED]  (Read 11417 times)

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Offline jiaweihuo

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Re: TP-LINK TL-WN721N wireless adapter
« Reply #15 on: April 28, 2013, 01:07:32 pm »
Ubuntu 12.04 64

Quote
jiaweihuo@jiaweihuo-LIFEBOOK-LH772:~$ uname -a
Linux jiaweihuo-LIFEBOOK-LH772 3.2.0-40-generic #64-Ubuntu SMP Mon Mar 25 21:22:10 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
jiaweihuo@jiaweihuo-LIFEBOOK-LH772:~$ md5sum /lib/firmware/htc_9271.fw
76c902360ef8a095133258fd0d287292  /lib/firmware/htc_9271.fw

Offline Mark Greaves (PCNetSpec)

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Re: TP-LINK TL-WN721N wireless adapter
« Reply #16 on: April 28, 2013, 01:13:41 pm »
Quote from: dmesg output
ath9k_htc: Unable to allocate URBs

I'm reading that ths issue was fixed in 12.10/13.04 .. do you want to try installing a newer kernel ?

We'll start with the most up to date (3.4) build for precise first if you want ?

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« Last Edit: April 28, 2013, 01:24:25 pm by Mark Greaves (PCNetSpec) »
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Offline jiaweihuo

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Re: TP-LINK TL-WN721N wireless adapter
« Reply #17 on: April 28, 2013, 01:29:10 pm »
Sorry, I do not want to upgrade to 12.10 or higher currently.

Offline Mark Greaves (PCNetSpec)

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Re: TP-LINK TL-WN721N wireless adapter
« Reply #18 on: April 28, 2013, 01:37:31 pm »
I'm not asking if you want to upgrade to 12.10/13.04 .. I'm asking if you want to try a newer kernel (possibly the one from 12.10/13.04 .. though we'll try the 3.4 kernel for 12.04 first) in 12.04 ?

See here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1088809
and
http://superuser.com/questions/465415/unable-to-allocate-urbs-error-on-usb-wi-fi-netgear-wnda3200
for info on the bug.

Do you want to try a more recent kernel in 12.04 ?
(there is nothing stopping you selecting the original kernel at bootup .. then removing the newer kernel if you want)

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« Last Edit: April 28, 2013, 02:10:51 pm by Mark Greaves (PCNetSpec) »
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Offline jiaweihuo

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Re: TP-LINK TL-WN721N wireless adapter
« Reply #19 on: April 28, 2013, 02:02:46 pm »
OK, I can upgrade to a newer kernel.

Offline Mark Greaves (PCNetSpec)

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Re: TP-LINK TL-WN721N wireless adapter
« Reply #20 on: April 28, 2013, 02:10:00 pm »
OK, run these commands in sequence:
Code: [Select]
mkdir ~/Desktop/precise-kernel-3.4
then
Code: [Select]
cd ~/Desktop/precise-kernel-3.4
then
Code: [Select]
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.4-precise/linux-headers-3.4.0-030400-generic_3.4.0-030400.201205210521_amd64.deb
then
Code: [Select]
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.4-precise/linux-image-3.4.0-030400-generic_3.4.0-030400.201205210521_amd64.deb
then
Code: [Select]
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.4-precise/linux-headers-3.4.0-030400_3.4.0-030400.201205210521_all.deb
then
Code: [Select]
sudo dpkg -i *.deb

Once that's finished .. REBOOT and post the output from:
Code: [Select]
uname -a

and check if the USB wireless adapter works .. if not, unplug the tplink, replug the tplink and post the output from:
Code: [Select]
dmesg | tail -n 20
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Offline jiaweihuo

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Re: TP-LINK TL-WN721N wireless adapter
« Reply #21 on: April 28, 2013, 02:31:22 pm »
It works. Thanks.

Offline Mark Greaves (PCNetSpec)

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Re: TP-LINK TL-WN721N wireless adapter [Solved]
« Reply #22 on: April 28, 2013, 03:04:05 pm »
You're welcome :)

You can safely delete the precise-kernel-3.4 folder on your desktop if you''d like.
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Offline jiaweihuo

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Re: TP-LINK TL-WN721N wireless adapter [SOLVED]
« Reply #23 on: May 02, 2013, 01:12:59 pm »
Hi, now I have a new problem. After upgrading the kernel to 3.4, the update manager asks to to update the kernel 3.2. What should I do? Thanks.

Offline Mark Greaves (PCNetSpec)

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Re: TP-LINK TL-WN721N wireless adapter [SOLVED]
« Reply #24 on: May 02, 2013, 03:20:09 pm »
What's the output from
Code: [Select]
uname -a

and if you click the "Check" button in update manager, is the 3.2 kernel still listed ?

This is Ubuntu 12.04 right ?
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Offline jiaweihuo

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Re: TP-LINK TL-WN721N wireless adapter [SOLVED]
« Reply #25 on: May 03, 2013, 01:41:34 am »
Quote
jiaweihuo@jiaweihuo-LIFEBOOK-LH772:~$ uname -a
Linux jiaweihuo-LIFEBOOK-LH772 3.4.0-030400-generic #201205210521 SMP Mon May 21 09:22:02 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
Ubuntu 12.04, yes.

The attachment is a sreenshot of update manager.
« Last Edit: May 03, 2013, 11:55:47 am by jiaweihuo »

Offline Mark Greaves (PCNetSpec)

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Re: TP-LINK TL-WN721N wireless adapter [SOLVED]
« Reply #26 on: May 03, 2013, 05:50:10 pm »
Just let it do the update .. if when you reboot it boots into a 3.2 kernel and wireless is broken, you can reboot and select kernel 3.4 from the grub menu.

If necessary, let us know and we'll set kernel 3.4 as the default kernel.
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Offline jiaweihuo

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Re: TP-LINK TL-WN721N wireless adapter [SOLVED]
« Reply #27 on: May 04, 2013, 01:25:24 am »
I do not use grub. But it selects kernel 3.4 by default.

 


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