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  #1  
Old 29th October 2010, 07:24 AM
DodgeJ Offline
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Posts: 10
windows_7chrome
Can't Enable Wireless

Hi all! I've been running Fedora 13 for the past week and today my wireless stopped working.

I'm sure my computer detects my wireless card as I can see the option for "Enable Wireless" (after right clicking on the computers icon in the upper right) but it's grayed out and I can't select it. I have a button on the side of my laptop to turn on the wireless but when I press it the light doesn't change to green (as it should when it's on). I also tried a wired connection, which worked.

I don't know why it stopped working today, as it's been working for the past week. I tried reinstalling Fedora, actually, but this hasn't fixed my problem. A friend told me that it might be a driver issue, but I don't know how to tell if I have the proper drivers. Also, if it is a driver issue, maybe reinstalling Fedora didn't fix my problem because my wireless card was off when I reinstalled? If this is a driver issue, I'm also not sure where I can find the proper drivers. Thanks for any help!
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  #2  
Old 29th October 2010, 11:10 AM
bbfuller Offline
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linuxopera
Re: Can't Enable Wireless

Hello DodgeJ

The answer is going to depend on several things.

If your wireless card was working previously under Fedora, did you apply any updates to the system just before it stopped working?

Some of the wireless software in Fedora needs to come from a third party repository and, just sometimes, that doesn't get updated as swiftly as the main repositories.

We need to know what your wireless card actually contains by the way of a chipset.

Try running the command:

Code:
lspci
from a terminal window and post back the parts that relate to "ethernet" and "network".

That will give us something to work on.
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  #3  
Old 29th October 2010, 06:43 PM
DodgeJ Offline
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linuxfedorafirefox
Re: Can't Enable Wireless

Here is the output from that command:

00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M-E LPC Interface Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
00:1f.6 Signal processing controller: Intel Corporation 82801I (ICH9 Family) Thermal Subsystem (rev 03)
01:00.0 Network controller: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] Network Connection
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)


I think the last two lines might be all you needed, but I didn't want to accidentally exclude something important.

There might have been some autoupdating that occured when my wireless crashed, but I didn't yum update or anything (purposfully). I'm pretty sure it just crashed.

Thanks again for your help!
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  #4  
Old 29th October 2010, 10:40 PM
bbfuller Offline
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linuxfedorakonqueror
Re: Can't Enable Wireless

Hello DodgeJ

Your wireless is this one:

Code:
01:00.0 Network controller: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] Network Connection
I don't have one of those, but it was my impression that all that was required to make that work was included in Fedora.

There are several diagnostics I would like you to try:

Code:
lsmod | grep iwl
That should lok at the modules loaded by the kernel and tell us if the one for your card is being loaded.

Then:

Code:
iwconfig
to see if a wireless interface is being created.

Code:
dmesg | grep iwl
and

Code:
dmesg | grep <whatever wireless interface was returned above>
should catch any messages as the various wireless parts load. (The wireless interface will probably be wlan0 but could be eth1)

If the machine is dual boot could you boot into Windows, ensure the card is working and then reboot directly into Linux. Sometimes the wireless switching isn't all that it could be in Linux.

Depending on the results of the above we'll think again.
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  #5  
Old 29th October 2010, 11:09 PM
DodgeJ Offline
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linuxfedorafirefox
Re: Can't Enable Wireless

Hey bbufller, I typed all the commands you suggested into my shell and will post the output below:

$ lsmod | grep iwl
iwlagn 147281 0
iwlcore 220675 1 iwlagn
mac80211 196945 2 iwlagn,iwlcore
cfg80211 117099 3 iwlagn,iwlcore,mac80211



$ iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wlan0 IEEE 802.11abgn Mode:Managed Access Point: Not-Associated
Tx-Power=off
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off


$ dmesg | grep iwl
iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, 2.6.33.3-85.fc13.x86_64-kds
iwlagn: Copyright(c) 2003-2009 Intel Corporation
iwlagn 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
iwlagn 0000:01:00.0: setting latency timer to 64
iwlagn 0000:01:00.0: Detected Intel Wireless WiFi Link 5100AGN REV=0x54
iwlagn 0000:01:00.0: Tunable channels: 13 802.11bg, 24 802.11a channels
iwlagn 0000:01:00.0: irq 29 for MSI/MSI-X
phy0: Selected rate control algorithm 'iwl-agn-rs'



$dmesg | grep wlan0
didn't output any text to my terminal.



I'm not positive I've been doing this correctly, but that's the output I got. I see that after iwconfig wlan0 has Tx-Power=off, which seemed like it might be related to my problem, but after looking up the man page for iwconfig, I'm not so sure.

Thanks again for your help! I really appreciate it. I'm not running a dual boot, I just have Fedora on here, so I can't switch back to windows to check if my card is working. However, my laptop is only about a month old, so my card probably hasn't failed from age.

Let me know what you think!
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  #6  
Old 29th October 2010, 11:21 PM
stoat Offline
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Posts: 7,550
linuxfedorafirefox
Re: Can't Enable Wireless

Hello everybody,

Your PRO/Wireless 5100 AGN chipset uses that iwlagn driver module listed in your lsmod report. It also requires a firmware package that comes with Fedora and is in the repos. But if it worked for a week, then I imagine you have everything you need installed already. That wireless switch comment made me think of rfkill. Anyway, it's caused things like this before. Example...
http://fedoraforum.org/forum/showthread.php?t=245404
It sure won't harm anything to try that.
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  #7  
Old 30th October 2010, 02:04 AM
DodgeJ Offline
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Join Date: Oct 2010
Posts: 10
linuxfedorafirefox
Re: Can't Enable Wireless

Thank you stoat!! That worked for me!

I'm not sure why my wifi crashed the first time, but I guess reinstalling Fedora and "rfkill unblock wifi" worked! Can you perhaps tell me what rfkilling did? I'm curious to know what exactly I did, and why it worked.

Thanks again
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