(worked around, but not fixed) TP-Link USB dongle, kernel 3.15, no DHCP lease

[sunrat]

I have a fix for this:-
Remove ath9k_htc module

Code Select Expand

# modprobe -r ath9k_htc
Load it with this parameter

Code Select Expand

modprobe ath9k_htc nohwcrypt=1

I am posting from kernel 3.15-4 and my TP-Link TL-WN822N.

From http://blog.gmane.org/gmane.linux.kernel.wireless.general

lolilolicon | 28 Jun 23:17 2014
Bug: USB wifi card TL-WN722N (AR9271, ath9k_htc) fails to get DHCP lease
This bug was introduced in merge commit 88daf80 (if I did the bisect correctly).
A workaround around the bug is to set the ath9k_htc param nohwcrypt=1.
The difference in the journal/log between good and bad is that in the
presence of the bug, dhcpcd would time out soliciting a DHCP lease.

[ayla]

I have a fix for this:-
Remove ath9k_htc module

Code Select Expand

# modprobe -r ath9k_htc
Load it with this parameter

Code Select Expand

modprobe ath9k_htc nohwcrypt=1

I am posting from kernel 3.15-4 and my TP-Link TL-WN822N.

works! Posting with:

Atheros TP-Link TL-WN821N v3 802.11n [Atheros AR7010+AR9287]

on Kernel 3.15-2.towo-siduction-amd64

Thanks sunrat

[dibl]

From http://blog.gmane.org/gmane.linux.kernel.wireless.general

lolilolicon | 28 Jun 23:17 2014
Bug: USB wifi card TL-WN722N (AR9271, ath9k_htc) fails to get DHCP lease
This bug was introduced in merge commit 88daf80 (if I did the bisect correctly).
A workaround around the bug is to set the ath9k_htc param nohwcrypt=1.
The difference in the journal/log between good and bad is that in the
presence of the bug, dhcpcd would time out soliciting a DHCP lease.

Nice catch sunrat -- thanks!

[mrsarmitage]

the ath5k driver atheros AR2413 is also affected. This is on a pcmcia card on older hp laptop with 3.15 kernel. the card is not recognised.
UB

[sunrat]

Still not fixed with today's d-u to kernel 3.15-6. The modprobe workaround is still needed.

[sunrat]

Still not fixed with today's d-u to kernel 3.15-8.

@dibl - is this fixed for you or do you still need the workaround? If not fixed could you remove (solved) from the title and it may get more attention.

[dibl]

@dibl - is this fixed for you or do you still need the workaround? If not fixed could you remove (solved) from the title and it may get more attention.

Not solved, AFAIK.  I have a different USB dongle that I can use on my desktop system that has no ethernet, so the TP-Link dongle is currently sitting on the shelf.  Changed the title accordingly, in case the ath9k_htc developers are hovering over our siduction forum.   

[sunrat]

I was hoping that the dev who posted in lkml saying he may have introduced the bug may also have fixed it by now. Still hoping.
I am very happy with the performance of this one, 130Mb/s reported speed and reliable connection, so not considering any alternatives.

[sunrat]

Still need the workaround with kernel 3.16-1 so not fixed yet.

[sunrat]

I got tired of reloading the module after every boot. The module parameter can be applied automatically with a file in /etc/modprobe.d/
I added this to ath9k_htc.conf

Code Select Expand

options ath9k_htc nohwcrypt=1

Works perfectly. But now I won't know when it is fixed in the kernel.

[michaa7]

There is hope