Bug#550534: firmware-iwlwifi: iwlagn 0000:03:00.0: Microcode SW error detected. Restarting 0x82000000.
Package: firmware-iwlwifi
Version: 0.18
Severity: grave
Justification: renders package unusable
Firmware iwlwifi-4965-2.ucode version 228.61.2.24 in firmware-iwlwifi 0.18
renders the wlan interface unusable. After a couple of minutes, the
following message appears in syslog:
iwlagn 0000:03:00.0: Microcode SW error detected. Restarting 0x82000000.
.... after which no packets can be sent, though the interface appears up.
Simply restarting the interface brings it up again.
Downgrading to 0.17 with firmware 228.57.2.23 solves the problem for me.
However, since 0.18 is already in squeeze, that version was hard to track
down. I found it in lenny-backports ultimately:
http://www.backports.org/debian/pool/non-free/f/firmware-nonfree/firmware-iwlwifi_0.17~bpo50+1_all.deb
Googling this problem turns up hits in every distribution imaginable.
Other Debian bugs that are possibly related are 546213 and 548749.
Allegedly Ubunty Karmic Koala fixes the problem, however, package
linux-firmware_1.21_all.deb also contains 228.61.2.24. A combination of
kernel driver and firmware version perhaps?
Intel seems unaware of the problem. 228.61.2.24 is still the latest version
on:
http://intellinuxwireless.org/?p=iwlwifi&n=downloads
This is very serious. Please revert to the older microcode version.
More information about my environment:
Intel Wireless WiFi 4965AGN. (ThinkPad R61, 802.11n draft WPA2 AP).
>From lspci:
03:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61)
wlan0 IEEE 802.11abgn ESSID:"<censored>"
Mode:Managed Frequency:2.437 GHz Access Point: <censored>
Bit Rate=54 Mb/s Tx-Power=15 dBm
Retry min limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=48/70 Signal level=-62 dBm Noise level=-91 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.30-1-686 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
firmware-iwlwifi depends on no packages.
firmware-iwlwifi recommends no packages.
Versions of packages firmware-iwlwifi suggests:
ii initramfs-tools 0.93.4 tools for generating an initramfs
di linux-image-2.6.30-1-686 [lin 2.6.30-6 Linux 2.6.30 image on PPro/Celeron
ii linux-image-2.6.30-2-686 [lin 2.6.30-8 Linux 2.6.30 image on PPro/Celeron
-- no debconf information
Reply to: