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Re: iwlwifi: GF was set with SGI:SISO

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Hi Cesar,

On Sat, 2012-05-26 at 21:56 -0300, Cesar Eduardo Barros wrote:
> I have twice now seen a problem with iwlwifi where rate control gets 
> "stuck" (the tx bitrate as shown by "iw dev wlan0 link" does not change 
> anymore), while spamming the kernel log with "iwlwifi 0000:03:00.0: GF 
> was set with SGI:SISO".
> 
> The first time, it was stuck at 48 Mbit/s. This time, it got stuck at 81 
> Mbit/s MCS 4 40MHz (long GI) [*]. But this time, I went to 
> /sys/kernel/debug/ieee80211/phy0/netdev:wlan0/stations and got a copy of 
> the rate_* files.
> 
> What I believe is happening is the following scenario:
[...]

Unfortunately, I don't have any idea right away right now what's going
on. Would you file a bug on bugzilla.intellinuxwireless.org so we can
track it and help you better? We may want to reproduce it and/or ask you
to collect some tracing information and it's easier to collect all that
in a bug report.

Thanks,
johannes

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