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Linux - Laptop and Netbook Having a problem installing or configuring Linux on your laptop? Need help running Linux on your netbook? This forum is for you. This forum is for any topics relating to Linux and either traditional laptops or netbooks (such as the Asus EEE PC, Everex CloudBook or MSI Wind).

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Old 03-15-2010, 05:56 AM   #1
Basilios
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Registered: Oct 2004
Distribution: Slackware
Posts: 33

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Networking problems on Lenovo T400 with Fedora 12


I'm having some odd wireless networking problems on a Lenovo T400 I was recently given in the office. I do get connected to the office's wireless router, and I do get online, but everything is really very slow and unreliable.

Connections are dropped randomly and often, so that, for example, if I try to access any web page, or download some software (directly from its web page, or using yum or the GUI to add or remove software), I often have to try again and again, stop and restart, and after loads of error messages, eventually I *might* get through. It took me the whole morning to download a 100Mb file yesterday!

The Linux distro I installed is Fedora 12. This is the relevant bit of the output of lspci -v:

Code:
03:00.0 Network controller: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] Network Connection
	Subsystem: Intel Corporation Device 1211
	Physical Slot: 1
	Flags: bus master, fast devsel, latency 0, IRQ 31
	Memory at f4300000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: [c8] Power Management version 3
	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [e0] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Device Serial Number 00-22-fa-ff-ff-bd-6d-fa
	Kernel driver in use: iwlagn
	Kernel modules: iwlagn
This is the output of ifconfig:

Code:
wlan0     Link encap:Ethernet  HWaddr 00:22:FA:BD:6D:FA  
          inet addr:172.17.130.178  Bcast:172.17.130.255  Mask:255.255.255.0
          inet6 addr: fe80::222:faff:febd:6dfa/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:47098 errors:0 dropped:0 overruns:0 frame:0
          TX packets:33285 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:46675331 (44.5 MiB)  TX bytes:5391619 (5.1 MiB)
This is the output of iwconfig:

Code:
lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11abgn  ESSID:"router3b"  
          Mode:Managed  Frequency:2.472 GHz  Access Point: 00:24:B2:4B:AB:03   
          Bit Rate=1 Mb/s   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=69/70  Signal level=-41 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

pan0      no wireless extensions.
Any suggestion would be really appreciated.

EDIT: Good grief, that's so annoying. It took me a dozen attempts just to log in to linuxquestions, another handful to get to this forum, and a good ten minutes to post this. And accessing the search function for some reason is out of the question - I get time outs and errors all the time! Grrr, so annoying.

Last edited by Basilios; 03-15-2010 at 05:58 AM.
 
Old 03-16-2010, 05:08 PM   #2
reed9
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Registered: Jan 2009
Location: Boston, MA
Distribution: Arch Linux
Posts: 653

Rep: Reputation: 142Reputation: 142
Quote:
Bit Rate=1 Mb/s
Your bit rate is quite low. See if you can set it higher. As root
Code:
iwconfig wlan0 rate 11M
http://linuxcommand.org/man_pages/iwconfig8.html
 
  


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