Slow connection with rt2500

IvD · **Posted:** Sun May 18, 2008 10:02 am

madwolfa wrote:

I can't imagine why it wasn't fixed yet with so many complaints.

Well if you know *exactly* what the cause of the problem is, then please say so. Because then it can be fixed.
If not, then you just have to wait until I have actually enough time to track this bug down, or wait until there arrives a second developer for rt2x00 who can look into this.

madwolfa · **Joined:** Sun May 18, 2008 5:23 am **Posts:** 3

Well, I have no idea.. :cry:

2.6.26-rc2 (with rt2500pci 2.1.4) didn't help at all...

madwolfa · **Joined:** Sun May 18, 2008 5:23 am **Posts:** 3

Actually it helped a bit - but I had to force rate to 54M. The quality of signal got up to 90% and speed went up to like 1.5-2.0 Mbps. But it's still far from enough, considering my 6.0 Mbps internet link.

devosion · **Joined:** Fri May 23, 2008 1:06 am **Posts:** 1

Is the git repository down? Everytime I try accessing it git tells me...

'error: No files to search found.'

I visited the main site and noticed the last time it had been accessed was 6 hours ago.

BTW im using this how-to: http://rt2x00.serialmonkey.com/wiki/ind ... structions

IvD · **Posted:** Fri May 23, 2008 2:00 pm

I don't have any problems, cloning/updating/pushing all work for me.

sulligogs · **Joined:** Thu Aug 23, 2007 4:35 pm **Posts:** 4

Hi,

This post is one of success regarding increasing the speed of my RT2500 card in Debian Lenny with the 2.6.24-1-686 kernel that comes with the rt2x00 drivers.

I thought that manually setting the rate of my card to "54M" had worked, but I was wrong.

However! I played around with other rates and when I set it to "11M" my card was flying!

So, at a root terminal I used:-

Code:

iwconfig wlan0 rate 11M

and my Firefox 3 download went from 7kbs to over 200kbs. Just in time actually as today is Firefox 3 Download Day

See if it helps you guys.

Sulligogs

JoCo · **Joined:** Mon Jun 23, 2008 8:03 pm **Posts:** 1

Hi,

Just confirming that manually setting the rate to 11M as suggested by Sulligogs results in a better connection for me than setting it to 54M, with the version of the rt2500pci driver contained in the following Mandriva 2008.1 kernel packages:

kernel-laptop-2.6.24.5-2mnb
kernel-linus-2.6.25.7-1mdv

Cheers,

Joe

ariveira · **Joined:** Sun Oct 15, 2006 10:17 am **Posts:** 13

I can confirm this behaviour with a rt2500pci card speed is slow by default on various kernel
versions (all vanilla).
If I force 54M with iwconfig i get back spected speed in kernels prior to 2.6.26-rc* on this
kernelseven this workaround wont work and i'm stuck with low speeds

So i guess i will have to stick with 2.6.25.y + iwconfig wlan0 rate 54M

Thanks for taking the time to look into this

amadues · **Joined:** Sat Jun 28, 2008 4:20 pm **Posts:** 2

IvD wrote:

madwolfa wrote:

I can't imagine why it wasn't fixed yet with so many complaints.

Well if you know *exactly* what the cause of the problem is, then please say so. Because then it can be fixed.
If not, then you just have to wait until I have actually enough time to track this bug down, or wait until there arrives a second developer for rt2x00 who can look into this.

IvD, are there any debug commands we can run to help you find the problem? Would shipping you an affected card help or do you also experience the same issue yourself (card associates at 1 Mbps, throughput is low even with rate forced to 54M)?

IvD · **Posted:** Sat Jun 28, 2008 5:12 pm

I can confirm the problem for 2.6.25, but have not been able to test 2.6.26 yet due to HardDisk problems on that kernel.
So far I don't know what is causing the problem, and am not sure where to start looking.

meetmeonaholiday · **Joined:** Mon Jul 14, 2008 5:12 pm **Posts:** 1

I can report my connection is still slow in 2.6.26 compiled last night. The fix reported here works though -- forcing the rate to either 11M or 54M (the change will not be reported in iwconfig). No idea what the issue is but I'm happy for this fix. Thanks for all your great work Ivo!

sverf · **Joined:** Mon Dec 17, 2007 8:42 am **Posts:** 4

Same problem here with a rt2500 pcmcia card (pciid 1814:3c00, subs 1948:4c00).
Driver associates fine (using WPA encryption and wpa_supplicant), but its stuck at 1M.

If I manually set rate 54M performance increases (btw, output of iwconfig doesnt show rate change immediately, it takes like 5-10sec to change in the iwconfig output for some reason).

Also the link quality reported goes up from about 53 to 83 after switching to 54M.

Another thing I noticed is when I
* iwconfig wlan0 rate 2M
* wait for iwconfig to report 2M (maybe it doesnt change till next packet is TX'ed? just guessing here),
* iwconfig wlan0 rate auto
* generate some traffic

The speed will automatically climb up to 54M. It seems there is some problem with just the 1M rate.

The rt61 pcmcia card I also have is not affected by this issue. Setting rate to 1M on the rt61 and then back to rate auto makes it climb back up to 54M.

chrisb · **Joined:** Tue Jul 15, 2008 9:35 am **Posts:** 3

Hi

Tried getting the driver compiled and working on SUSE 10.3 but gave up and installed 11.0 instead.

Similar things happening on Suse 11.0. Using kernel 2.6.25.9-0.2-default and still getting the speed issue described above.
Again using "iwconfig wlan0 RATE 54M" works a treat!

Thanks

Chris

ariveira · **Joined:** Sun Oct 15, 2006 10:17 am **Posts:** 13

ariveira wrote:

I can confirm this behaviour with a rt2500pci card speed is slow by default on various kernel
versions (all vanilla).
If I force 54M with iwconfig i get back spected speed in kernels prior to 2.6.26-rc* on this
kernelseven this workaround wont work and i'm stuck with low speeds

So i guess i will have to stick with 2.6.25.y + iwconfig wlan0 rate 54M

Thanks for taking the time to look into this

The problem persits on 26 final the previous working workaround of manually forcing
higher speeds no longer works.

Any advance on this? Anything i can do to help ?

Thanks in advance

Zi7 · **Posted:** Fri Jul 18, 2008 5:18 pm

sverf wrote:

Another thing I noticed is when I
* iwconfig wlan0 rate 2M
* wait for iwconfig to report 2M (maybe it doesnt change till next packet is TX'ed? just guessing here),
* iwconfig wlan0 rate auto
* generate some traffic

The speed will automatically climb up to 54M. It seems there is some problem with just the 1M rate.

Could you please confirm that this same trick does _not_ work when you set the rate to 1M (instead of 2M) then back to 'auto' (rt2500pci)?

rt2x00.serialmonkey.com

Slow connection with rt2500

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