[rt2x00-users] Backport "rt2800pci: fix spurious interrupts generation" to Linux 3.2.x?

[Stanislaw Gruszka]

On Sun, Jan 29, 2012 at 07:08:22PM +0100, Dennis Martin Herbers wrote:
> Linux 3.2.2 is now in Ubuntu 12.04 development branch and just like 3.3rc1
> it did not fix my problem, so maybe I am hitting something else. I looked
> through the earlier Ubuntu development kernels and there doesn't seem to be
> a kernel that really fixes my issue. I probably just had "luck" at that
> time, because sometimes the speed goes down from ~700KB/s to ~75KB/s within
> few seconds and sometimes it needs a few minutes. I'd say 30 seconds on
> average. I remember that playing with sudo iwconfig wlan0 power off and
> then disconnecting/reconnecting increased the speed again until it went
> down again after a few seconds, not sure if it's related to power
> management though. Where would I see the "irq N: nobody cared" messages,
> dmesg?
Yes.

> I don't remember seeing those but I'll check back soon.
> 
> Also I would be very interested if the fix that went into 3.2.2 and 3.3rc1
> actually fixed the slow performance for anyone else (RedHat bugtracker &
> Ubuntu Launchpad bug entry). I'll ask the Ubuntu users for new results.

We currently fixing some radio chip programming, you may want to check
that, you can apply patches using compat wireless. These patchesets
are exclusive, so apply one and if it does not help, apply second.

http://rt2x00.serialmonkey.com/pipermail/users_rt2x00.serialmonkey.com/2012-January/004529.html
http://rt2x00.serialmonkey.com/pipermail/users_rt2x00.serialmonkey.com/2012-January/004503.html

Stanislaw