11.04 Slow wireless connection using ath9k drivers.

[silkworm2.5]

Hello Everyone!

Title pretty much says it all. Since upgrading to Ubuntu 11.04 my wireless connection has been extremely slow. The same happened with 10.10. Although that was quite different. Back then everything within my network moved slowly, but now it doesn't affect my web browser.
It seems to have only slowed the application centre and update manager. I am still waiting for the flash plugin to download and install for testing youtube, but I am torrenting Ubuntu 11.04 right now and have actually hit the limit of my bandwidth (1.1 MB/s) whereas the speed in the software centre and update manager was in the region of 45 kb/s.

I'm not sure if this is because I have installed extra drivers found here after I did some research.

Although my web surfing is fast and stable, I would like to get my updates and applications downloading properly. Does anyone know what I can do?

From my 2-hour googling spree I know you may want the results from the command "lspci"

root@Felicia:/home/silkworm# lspci
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
00:1f.6 Signal processing controller: Intel Corporation 82801I (ICH9 Family) Thermal Subsystem (rev 03)
02:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)

Any help would be greatly appreciated ^_^

And by the way, a little off topic, but is downloading apps through Ubuntu Tweak just another interface for apt-get? Because that has the same speed as the software centre.

[malbicho]

Hi, try this is well explained:
http://linuxwireless.org/en/users/Do...ng_the_tarball

I had the same problem with ath9k and it worked for me

[OOHHOO]

hi,

i have the same problem. 11.04 has turned my high speed wifi into a slow dialup style connection. i conect to my wireless router just fine but when i try to load a page, it just sits there loading and takes a long time or it just stops loading altogether.

unfortunately i have no clue what to do at the link. i don't know how to compile a tarball thing or where to put those scripts.

is there an easy way to ugrade my drivers for the ath9k?

thanks in advance for any help.

[yellerKat]

See this post here: LINK

Basically all you have to do is:

sudo -s

echo "options ath9k nohwcrypt=1" > /etc/modprobe.d/ath9k.conf

and reboot!

(Thanks to mantaor and Andrea!)

[OOHHOO]

Thank you so much !!

it worked!! i truly appreciate your help.

i hope you have a wonderful week.


thank you again!!

[wburden]

Thank you "Yellercat"! This solution worked flawlessly for me also.

Just a slight addition to your solution - you can type "reboot" as step 3 from terminal to initiate the reboot process. Thank God for Ubuntu Forums.

See this post here: LINK

Basically all you have to do is:

sudo -s

echo "options ath9k nohwcrypt=1" > /etc/modprobe.d/ath9k.conf

and reboot!

(Thanks to mantaor and Andrea!)

[mcongom]

See this post here: LINK

Basically all you have to do is:

sudo -s

echo "options ath9k nohwcrypt=1" > /etc/modprobe.d/ath9k.conf

and reboot!

(Thanks to mantaor and Andrea!)

Thanks!!! It also worked for me!!!!

[fgm@osinet.fr]

Using this nocrypt option actually restores speed, but my machine then crashes completely after a variable duration, from a few seconds to a few minutes. It then needs a hard reboot. This does not happen when nocrypt is not used (and wifi is then slow enough to get timeouts on most transmissions).

[silkworm2.5]

Thanks for that response yellerKat! That fixed it right up this time!

[quantumriff]

FYI, I just installed the newest kernel (2.6.38-9.43) that is in the ubuntu-proposed update tree, and it seems to fix the issues with the ath9k driver. My Acer laptop is usable on wireless again!