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Re: [regression][2.6.38-rcX][net][iwlagn] WiFi signal after period of time tanks causing contant drops

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On Wed, 2011-02-09 at 23:15 -0800, Andrew Morton wrote:
> (cc linux-wireless)
> 
> On Sun, 06 Feb 2011 22:54 -0500 Shawn Starr <shawn.starr@xxxxxxxxxx> wrote:
> 
> > 
> > Using a Intel Corporation PRO/Wireless 5100 AGN [Shiloh] card after rebooting 
> > and a period of of seveal hours signal begins to drop to low levels:
> > 
> > 
> > wlan0     IEEE 802.11abgn  ESSID:"XXXXXXXX"  
> >           Mode:Managed  Frequency:2.462 GHz  Access Point: AA:BB:CC:DD:EE:FF   
> >           Bit Rate=11 Mb/s   Tx-Power=15 dBm   
> >           Retry  long limit:7   RTS thr:off   Fragment thr:off
> >           Power Management:off
> >           Link Quality=12/70  Signal level=-98 dBm  
> >           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
> >           Tx excessive retries:0  Invalid misc:35   Missed beacon:0
> > 
> > ...
> > 
> >           Link Quality=12/70  Signal level=-98 dBm  
> >           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
> >           Tx excessive retries:0  Invalid misc:40   Missed beacon:0
> > 
> > I start seeing lots of Invalid misc errors and connection drops. If I reboot, 
> > then signal will be back to normal for a period of time again.
> > 
> > My official kernel is from Fedora rawhide (2.6.38-0.rc3.git4.1.fc15.x86_64)
> > 
> > Anyone else notice poor link/signal levels?
> > 
> > .37 showed no such issues.


did not see anything special from the log, is any environment or
condition changed? what AP you are using?

Thanks
Wey

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