As I mentioned earlier, I have been a linux distro user for years, but
have never had to delve into the building of individual kernel modules.
So I thought I would post this lesson of what NOT to do.
<START LESSON>
I followed the README instructions and issued the commands below:
$ ./scripts/driver-select iwlwifi
$ make
$ sudo make install
$ sudo make wlunload
$ sudo modprobe iwl3945
and on the modprobe I received:
FATAL: Error inserting iwl3945
(/lib/modules/2.6.35-27-generic/kernel/drivers/net/wireless/iwlwifi/iwl3945.ko):
Invalid argument
with the end of my dmesg log showing several:
iwlcore: disagrees about version of symbol <SYMBOL_NAME>
iwlcore: Unknown symbol <SYMBOL_NAME> (err -22)
Thinking that I may have not uninstalled enough kernel modules before
trying to install the new iwl3945, I rebooted the machine. When the
machine was back up, I had the exact same messages the dmesg log.
I was able to get back to the my original (i.e. slow) state by issuing:
$ sudo make wlunload
$ sudo modprobe iwl3945
<STOP LESSON>
The first step in the lesson above, driver-select, is a shortcut and
sped up the compile and install times dramatically. As I was
investigating this problem, I found that this shortcut does not build
the mac80211 module and the "disagrees about version of symbol" errors
are due to the original mac80211 module not being compatible with the
new iwlcore and iwl3945 modules.
The correct steps are below:
$ ./scripts/driver-select restore
$ make
$ sudo make install
$ sudo make wlunload
$ sudo modprobe iwl3945
I now have a fully functional iwl3945 module loaded and consistently
getting speeds comparable to my wife's M$ machine.
5.14 Mb/s Download
0.65 Mb/s Upload
35 ms Ping
Everything seems to be stable.
@Andy Whitcroft Thanks for the work on getting this fixed.
@Radosław Piliszek Thanks for the patience and guidance.
@s0undt3ch Thanks again for the assistance.
Just for completeness below is the output from lspci and uname:
$ lspci -vnn | grep -A 1 Wireless
06:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG
[Golan] Network Connection [8086:4222] (rev 02)
Subsystem: Intel Corporation PRO/Wireless 3945ABG Network Connection
[8086:1000]
Flags: bus master, fast devsel, latency 0, IRQ 47
$ uname -a
Linux billlaptop 2.6.35-27-generic #47lp621265v201102161837 SMP Wed Feb
16 18:40:53 UTC 2011 i686 GNU/Linux
I also noticed that I was the only one reporting on the Subsystem
[8086:1000].
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/621265
Title:
Slow Wireless Connection in Intel 3945abg
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
