rt2800usb poor performance

rt2800usb poor performance

[Christian Frost]

Hi,

I'm experiencing poor performance with a rt2800usb device when using
"compat-wireless-3.2-rc6-3" on a 2.6.35 kernel. The bandwidth is
~0.5Mbps which I would expect to be significantly higher on a G
network. Can anyone help with this?

Regards,
Christian

Re: rt2800usb poor performance

[Stanislaw Gruszka]

On Thu, Dec 22, 2011 at 12:44:17PM +0100, Christian Frost wrote:
> I'm experiencing poor performance with a rt2800usb device when using
> "compat-wireless-3.2-rc6-3" on a 2.6.35 kernel. The bandwidth is
> ~0.5Mbps which I would expect to be significantly higher on a G
> network. Can anyone help with this?

Do you have any better results on older compat wireless version i.e.
3.0 or 3.1. Does disable power save helps (iwconfig wlanX power off)?
Did you try update AP firmware?

Stanislaw

Re: rt2800usb poor performance

[Christian Frost]

Yes, I have tried all your suggestions and they do not help. I
havedownloaded the firmware from ralinktech in version v2.4.0.1

Christian
On Thu, Dec 22, 2011 at 3:11 PM, Stanislaw Gruszka <sgruszka@redhat.com> wrote:
> On Thu, Dec 22, 2011 at 12:44:17PM +0100, Christian Frost wrote:
>> I'm experiencing poor performance with a rt2800usb device when using
>> "compat-wireless-3.2-rc6-3" on a 2.6.35 kernel. The bandwidth is
>> ~0.5Mbps which I would expect to be significantly higher on a G
>> network. Can anyone help with this?
>
> Do you have any better results on older compat wireless version i.e.
> 3.0 or 3.1. Does disable power save helps (iwconfig wlanX power off)?
> Did you try update AP firmware?
>
> Stanislaw

Re: rt2800usb poor performance

[Stanislaw Gruszka]

On Thu, Dec 22, 2011 at 03:42:00PM +0100, Christian Frost wrote:
> Yes, I have tried all your suggestions and they do not help. I
> havedownloaded the firmware from ralinktech in version v2.4.0.1

If you compile driver with CONFIG_RT2X00_DEBUG it will show exact
chip name. Please provide that info, we probably need to fix
that chip support in rt2800usb. For now you will need to use vendor
driver, which unfortunately will most likely work better than in kernel
driver for that particular chip.

Stanislaw

Re: rt2800usb poor performance

[Christian Frost]

I get the following print outs:

Compat-wireless backport release:
compat-wireless-v3.2-rc6-3Backportbased on linux-stable.git
v3.2-rc6cfg80211: Calling CRDA to updateworld regulatory domainusb
2-1: reset high speed USB device usingehci_hcd and address 2phy0 ->
rt2x00_set_chip: Info - Chipset detected- rt: 3070, rf: 0005, rev:
0201.

Please let me know if you need for info.
On Thu, Dec 22, 2011 at 4:54 PM, Stanislaw Gruszka <sgruszka@redhat.com> wrote:
> On Thu, Dec 22, 2011 at 03:42:00PM +0100, Christian Frost wrote:
>> Yes, I have tried all your suggestions and they do not help. I
>> havedownloaded the firmware from ralinktech in version v2.4.0.1
>
> If you compile driver with CONFIG_RT2X00_DEBUG it will show exact
> chip name. Please provide that info, we probably need to fix
> that chip support in rt2800usb. For now you will need to use vendor
> driver, which unfortunately will most likely work better than in kernel
> driver for that particular chip.
>
> Stanislaw

Re: rt2800usb poor performance

[Xose Vazquez Perez]

Christian Frost wrote:

> Yes, I have tried all your suggestions and they do not help. I
> havedownloaded the firmware from ralinktech in version v2.4.0.1

The latest fw is at:
http://git.kernel.org/?p=linux/kernel/git/firmware/linux-firmware.git

the fw of ralink web is outdated.

Re: rt2800usb poor performance

[Andreas Hartmann]

Xose Vazquez Perez schrieb:
> Christian Frost wrote:
> 
>> Yes, I have tried all your suggestions and they do not help. I
>> havedownloaded the firmware from ralinktech in version v2.4.0.1
> 
> The latest fw is at:
> http://git.kernel.org/?p=linux/kernel/git/firmware/linux-firmware.git
> 
> the fw of ralink web is outdated.

Hmmm. Example: chip rt3572 - firmware: rt2870.bin

from git: version is 0.29
from DPO_GPL_RT5572_LinuxSTA_V2.5.0.0_20111019 [1]: version is 0.236

(yes, this driver supports rt3572, too (I'm using it)).


BTW: I can't find any 5572 support in actual compat-wireless (I searched
for the rt55 string in all files).



Kind regards,
Andreas


[1] http://www.ralinktech.com/en/04_support/support.php?sn=501