Comment 370 for bug 621265

configuring the iwl3945 module with disable_hw_scan=0 fixes the "speed regression" problem for me on 3.0.0

but i still see the "Microcode SW error detected. Restarting 0x82000008." problem, in regular intervals, either 40 or 100 or 120 seconds

anyone still affected by the "speed regression", try adding the parameters to a file under /etd/modprobe.d, eg:

# cat /etc/modprobe.d/iwl3945.conf
options iwl3945 disable_hw_scan=0

then, with (as root)

modprobe -r iwl3945
modprobe iwl3945

you can hope to better speed

if this helps for you, it would probably be helpful if you could post success/failure here, and along the way i would also be interested is someone sees these "Microcode SW error" issues

please also add the output of

lspci -vnn |grep -A3 Wireless
uname -a
lsb_release -rd

output on my machine:
# lspci -vnn |grep -A3 Wireless; uname -a; lsb_release -rd
04:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection [8086:4227] (rev 02)
        Subsystem: Intel Corporation ThinkPad R60e/X60s [8086:1011]
        Flags: bus master, fast devsel, latency 0, IRQ 46
        Memory at f8000000 (32-bit, non-prefetchable) [size=4K]
Linux sleipnir 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
Description: Ubuntu 11.10
Release: 11.10

special thanks go to ... anonymous internet guy who shared this information with me, credit is due to be given to you

regards, gruessle
Simon