Hi all, I am looking for some help with my Vaio, model FZ21S loaded with UBUNTU.
It did have a utility to switch the wireless network between B G or N/DRAFT of course this no longer exists and i’m sure that since loading UBUNTU the network card is now operating on the N/DRAFT frequency only. Does any one know how to turn it back to B G frequency.
This is because my router only kicks out B G frequency. It will sometimes connect but has limited connectivity. Can anyone help please i would be most grateful.
i have since learned that my router is indeed N wireless so i dont think that this was the problem. I did manage to get it connected briefly today and when i did a bandwidth speed check the download speed was fine but there was no upload speed reported ?? would this hamper my overall connectivity ? and if so what can i do to solve this. btw other laptops using the wireless are ok.
Hi RichKelley, and welcome to the forum 
Can you open a terminal (Ctrl+Alt+T) and enter:
sudo lshw -C network
hit enter, and your password when asked … then post back the output.
can you do the same thing with:
ifconfig
and:
sudo iwlist scanning
[EDIT]
And which version of Ubuntu are you running? … can you send the output from:
cat /etc/*-release
and
uname -srp
Thanx for a quick reply Mark
the 1st code i put in and pressed enter it asked for my password but my keyboard was no longer working so i put the password in anyway, when i entered it came up sudo 1 command not found.
ifconfig come up with
eth0 link encap: ethernet HWaddr 00:1a:80:18:40:53
up broadcast multicast mtu:1500 metric:1
rx and tx all values zero
collisions:0 txquelen:1000
rx bytes : (0.0 b) tx bytes same
interupt:16
lo linc encap:local loopback
inet addr:127.0.0.1 mask:255.0.0.0
inet6 addr: ::1/28 scope:host
up loopback running mtu: 16436 metric 1
rx and tx packets all values zero
collisions: 0 txquelen:0
rx bytes:(0.0 B) tx bytes:0 (0.0 B)
wlan linc encap:ethernet HWaddr 00:13:e8:bc:32:59
inet6 addr : fe80::213:e8ff:febc:3259/64 scope: linc
up broadcast multicast mtu:1500 metric:1
rx packets:155 the rest are zero
tx packets:169 the rest are zero
collisions:0 txquelen:1000
rx bytes:28233 (28.2 kb) tx bytes:2735 (27.3 kb)
code iw1 ist scanning came back command not found
code cat /etc/*-release come up no such file or directory
uname sip come back linux i686 i386
the version is UBUNTU 11.10
i hope this all means something to you it does’nt mean much to me lol
I need the output from that first command … so can you try again:
sudo lshw -C network
Things to be aware of .
commands MUST be entered EXACTLY as shown … the above command doesn’t contain a “1”, it’s a lower case L
Linux commands ARE case sensitive … so that’s a capital “C”
When entering your password in a terminal, nothing will be echoed to screen (not even ******) but it IS going in, so just enter your password and hit enter.
I’ve done a little research and it looks like your laptop probably has an Intel PRO/Wireless 4965 AG or AGN [Kedron] … but I won’t know for sure till I get the output from the above command.
But just as a matter of interest, what happens if you run these 2 commands:
sudo rmmod -f iwlagn
then
sudo modprobe iwlagn swcrypto=1
For clarity, those are
sudo rmmod -f iwlagn
sudo modprobe iwlagn swcrypto=1
If those commands run without error … how is your wireless connection now ?
Be aware - if that works, it won’t survive a reboot, but if it works we can add a file /etc/modprobe.d/iwlang.conf and iclude those options … so just for now I just want to know if that helps.
many thanx for the tips mark, i’m new to this so i will run those codes again when i get chance (out atm).
Whenever you’re ready
ok Mark here is some of the info you asked for but there has been a development, my wifi has worked fine today so i think it maybe an router problem or an isp problem i will see how it goes.
as for the result of rmmod -f iwlagn = error: removing iwlagn no such file or directory
and the result of sudo modprobe iwlagn swcrypto=1 nothing came back
I am sorry if the above info confuses the issue i would say though that the connection is not that strong and only manages 50 to 65 mbps
*-network
description: Wireless interface
product: PRO/Wireless 4965 AG or AGN [Kedron] Network Connection
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:06:00.0
logical name: wlan0
version: 61
serial: 00:13:e8:bc:32:59
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwl4965 driverversion=3.0.0-13-generic firmware=228.61.2.24 latency=0 link=no multicast=yes wireless=IEEE 802.11abgn
resources: irq:47 memory:fa000000-fa001fff
*-network
description: Ethernet interface
product: 88E8036 PCI-E Fast Ethernet Controller
vendor: Marvell Technology Group Ltd.
physical id: 0
bus info: pci@0000:08:00.0
logical name: eth0
version: 16
serial: 00:1a:80:18:40:53
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.28 firmware=N/A latency=0 link=no multicast=yes port=twisted pair
resources: irq:45 memory:fc000000-fc003fff ioport:6000(size=256)
richard@richard-VGN-FZ21S:~$
No, as I said I was guessing at the driver … for your card it used to be iwlagn, but apparently it is now iwl4965
Still if it’s working, it doesn’t matter now
Good luck, and if it gives you problems in the future, give us a shout and we’ll see what we can do.
Just to clear this thread up. seems my router was at fault so all is good in wifi land again. I do have some other issues but i will post the questions in the right place, Once again many thanx Mark.
No problem … not that I actually did anything