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    SubjectRe: [regression][2.6.38-rcX][net][iwlagn] WiFi signal after period of time tanks causing contant drops
    Date
    On Thursday, February 10, 2011 07:16:24 AM wwguy wrote:
    > 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@rogers.com>
    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

    I'm using an Linksys WRT54G with tomato firmware for a number of years. The AP
    is in my house and very close. I will keep an eye on this. This all seemed to
    have started after we had a power outage. The AP is fine however and I haven't
    noticed this drop a 2 after.

    If there was any environment changes they appear to have 'settled' down.

    I will be going to 2.6.38-0.rc4.git0.1.fc15 right now and will do another long
    hour test by keeping the laptop on for a number of hours on the weekend.

    Thanks,
    Shawn.




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