Intel 3945ABG slow

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FreakShow!
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Posts: 4
Joined: Sun Feb 11, 2007 12:34 pm

Intel 3945ABG slow

Post by FreakShow! » Sun Oct 31, 2010 10:47 am

Hi,

I have an unusual, but annoying problem.

I've recently installed Mint 10RC and was very impressed with it. WiFi speeds were good (unlike Ubuntu going at 50kb/s).

However it slowed down to the same as Ubuntu after a bit. So I did some testing:

Running Mint booted off a USB stick and not installed, WiFi speeds are good. A little slower than Windows, but not too big a deal.

Running the mintWifi.py gives me:

Code: Select all

mint@mint ~ $ sudo /usr/lib/linuxmint/mintWifi/mintWifi.py
-------------------------
* I. scanning WIFI PCI devices...
  -- Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)
      ==> PCI ID = 8086:4222 (rev 02)
-------------------------
* II. querying ndiswrapper...
-------------------------
* III. querying iwconfig...
lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11abg  ESSID:"BeboxS"  
          Mode:Managed  Frequency:2.422 GHz  Access Point: 00:24:17:B0:B7:DB   
          Bit Rate=54 Mb/s   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=70/70  Signal level=-34 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

-------------------------
* IV. querying ifconfig...
eth0      Link encap:Ethernet  HWaddr 00:1d:09:a4:30:28  
          inet6 addr: fe80::21d:9ff:fea4:3028/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:90 errors:0 dropped:0 overruns:0 frame:0
          TX packets:57 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:12847 (12.8 KB)  TX bytes:8966 (8.9 KB)
          Interrupt:17 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:28 errors:0 dropped:0 overruns:0 frame:0
          TX packets:28 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2016 (2.0 KB)  TX bytes:2016 (2.0 KB)

wlan0     Link encap:Ethernet  HWaddr 00:1c:bf:9d:33:e4  
          inet addr:192.168.1.86  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::21c:bfff:fe9d:33e4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:26052 errors:0 dropped:0 overruns:0 frame:0
          TX packets:15835 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:35429738 (35.4 MB)  TX bytes:3671104 (3.6 MB)

-------------------------
* V. querying DHCP...
Internet Systems Consortium DHCP Client V3.1.3
Copyright 2004-2009 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/eth0/00:1d:09:a4:30:28
Sending on   LPF/eth0/00:1d:09:a4:30:28
Listening on LPF/wlan0/00:1c:bf:9d:33:e4
Sending on   LPF/wlan0/00:1c:bf:9d:33:e4
Sending on   Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 3
DHCPOFFER of 192.168.1.86 from 192.168.1.254
DHCPREQUEST of 192.168.1.86 on wlan0 to 255.255.255.255 port 67
DHCPACK of 192.168.1.86 from 192.168.1.254
bound to 192.168.1.86 -- renewal in 39815 seconds.
-------------------------
* VI. querying nslookup google.com...
Server:        192.168.1.254
Address:    192.168.1.254#53

Non-authoritative answer:
Name:    google.com
Address: 173.194.36.104
Then I install Mint to my hard drive. And WiFi speeds are pretty dire. Its sitting in the same place, so can't be WiFi signal has changed, same servers, and while I can expect a change in test speed, not by that much.

The mintWifi.py code this time is:

Code: Select all

maza@MintyFreshness ~ $ sudo /usr/lib/linuxmint/mintWifi/mintWifi.py
[sudo] password for maza: 
-------------------------
* I. scanning WIFI PCI devices...
  -- Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)
      ==> PCI ID = 8086:4222 (rev 02)
-------------------------
* II. querying ndiswrapper...
-------------------------
* III. querying iwconfig...
lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11abg  ESSID:"BeboxS"  
          Mode:Managed  Frequency:2.422 GHz  Access Point: 00:24:17:B0:B7:DB   
          Bit Rate=54 Mb/s   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=70/70  Signal level=-36 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

-------------------------
* IV. querying ifconfig...
eth0      Link encap:Ethernet  HWaddr 00:1d:09:a4:30:28  
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:17 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:12 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:720 (720.0 B)  TX bytes:720 (720.0 B)

wlan0     Link encap:Ethernet  HWaddr 00:1c:bf:9d:33:e4  
          inet addr:192.168.1.86  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::21c:bfff:fe9d:33e4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:11965 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8131 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:16593139 (16.5 MB)  TX bytes:1652678 (1.6 MB)

-------------------------
* V. querying DHCP...
Internet Systems Consortium DHCP Client V3.1.3
Copyright 2004-2009 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/eth0/00:1d:09:a4:30:28
Sending on   LPF/eth0/00:1d:09:a4:30:28
Listening on LPF/wlan0/00:1c:bf:9d:33:e4
Sending on   LPF/wlan0/00:1c:bf:9d:33:e4
Sending on   Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 3
DHCPOFFER of 192.168.1.86 from 192.168.1.254
DHCPREQUEST of 192.168.1.86 on wlan0 to 255.255.255.255 port 67
DHCPACK of 192.168.1.86 from 192.168.1.254
bound to 192.168.1.86 -- renewal in 32973 seconds.
-------------------------
* VI. querying nslookup google.com...
Server:        192.168.1.254
Address:    192.168.1.254#53

Non-authoritative answer:
Name:    google.com
Address: 173.194.37.104
I have no idea what's changed. This is my third install after I've tried to update to the Intel Linux driver and failed, tried to use Ndiswrapper, and failed and also tried going back to ipw3945 instead of iwl3945. Any help would be really appreciated.

User avatar
DrHu
Level 17
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Posts: 7537
Joined: Wed Jun 17, 2009 8:20 pm

Re: Intel 3945ABG slow

Post by DrHu » Sun Oct 31, 2010 11:24 am

Never had that problem and it makes no sense, if anything the installed version should run quicker at least on startup of the application, than the usb drive, since the hard drive on the computer will be faster

There is no reason that the installed wireless should be different, however you can check the driver being using, if you are curious
In terminal, check
  • inxi -N
    --network card only
    inxi -F
    --general detected devices
Linux, wireless tools..
http://www.hpl.hp.com/personal/Jean_Tou ... Tools.html
You can use the network tools to check
iwist, iwconfig, and the general ifconfig, on both the installed and the live (run from CD) versions
--see what, if any differences you find..

FreakShow!
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Posts: 4
Joined: Sun Feb 11, 2007 12:34 pm

Re: Intel 3945ABG slow

Post by FreakShow! » Sun Oct 31, 2010 12:45 pm

Hi, thanks for the reply.

Currently I'm installed properly and just done a speedtest.net and the wifi speeds are decent atm. It could be that the DVD edition is incompatible (as the v10 isn't released and so it's using the v9 which screws something up maybe?).

The thing is it jumps from one extreme to the next. I have Wine currently downloading and installing and speeds jump about, from 400B/s up to 90kB/s. It's got to be something with the driver. I ran that command and it is using iwl3945.

Is there a guide on how to properly blacklist it and use Ndiswrapper? or ipw3945? I've managed to blacklist iwl (i think) and all that acheives is no wifi signal at all and ndiswrapper not taking over and doing it's job. (As in it's not even trying, I have a driver installed OK, just it doesn't do anything).

Any help appreciated.

FreakShow!
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Posts: 4
Joined: Sun Feb 11, 2007 12:34 pm

Re: Intel 3945ABG slow

Post by FreakShow! » Fri Nov 12, 2010 8:44 pm

Just installed the full 10 release. Exactly the same thing happened, booting off the USB stick worked pretty good (6-7MBps, not full speed, but good enough) and then after installing dropped down to about .50MBps.

I really can't understand what would have changed from the one to the next.

Only other thing I can ask is, does anyone have a 64-bit inf file? The one I had was making calls to windows things.

Any help would really be appreciated.

kung-foo
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Level 1
Posts: 1
Joined: Mon Dec 06, 2010 1:24 pm

Re: Intel 3945ABG slow

Post by kung-foo » Mon Dec 06, 2010 1:27 pm

I am having the same problem on my Dell M1210.

I think this bug posting is relevant:
https://bugs.launchpad.net/ubuntu/+sour ... bug/621265

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