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Thread: Wireless stopped working on 9.10 (Intel WiFi Link 5100)

  1. #1
    Join Date
    Dec 2008
    Beans
    11

    Wireless stopped working on 9.10 (Intel WiFi Link 5100)

    I've got a Dell precision with Kubuntu 9.10. Wifi worked fine on that machine for months, but stopped working last week. I don't know what happened, but I recently did an "apt-get dist-upgrade". That might have something to do with it.

    Does anyone have any suggestions that might point me towards a solution?
    When I boot in Windows, wifi works fine.

    Code:
    tijl@Smaug:~$ sudo lshw -C network
      *-network
           description: Ethernet interface
           product: 82567LM Gigabit Network Connection
           vendor: Intel Corporation
           physical id: 19
           bus info: pci@0000:00:19.0
           logical name: eth0
           version: 03
           serial: 00:24:e8:da:e6:90
           size: 100MB/s
           capacity: 1GB/s
           width: 32 bits
           clock: 33MHz
           capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
           configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=1.0.2-k2 duplex=full firmware=1.7-7 ip=192.168.0.106 latency=0 link=yes multicast=yes port=twisted pair speed=100MB/s
           resources: irq:30 memory:f6fe0000-f6ffffff memory:f6fdb000-f6fdbfff ioport:efe0(size=32)
      *-network DISABLED
           description: Wireless interface
           product: Wireless WiFi Link 5100
           vendor: Intel Corporation
           physical id: 0
           bus info: pci@0000:0c:00.0
           logical name: wmaster0
           version: 00
           serial: 00:24:d6:2e:ae:7a
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress bus_master cap_list logical ethernet physical wireless
           configuration: broadcast=yes driver=iwlagn latency=0 multicast=yes wireless=IEEE 802.11abgn
           resources: irq:31 memory:f1ffe000-f1ffffff
    Code:
    tijl@Smaug:~$ lsmod | grep iwlagn
    iwlagn                124896  0
    iwlcore               133600  1 iwlagn
    mac80211              210040  2 iwlagn,iwlcore
    cfg80211              109144  3 iwlagn,iwlcore,mac80211
    Code:
    tijl@Smaug:~$ dmesg | grep iwlagn
    [   25.271384] iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, 1.3.27k
    [   25.271386] iwlagn: Copyright(c) 2003-2009 Intel Corporation
    [   25.271706] iwlagn 0000:0c:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
    [   25.271732] iwlagn 0000:0c:00.0: setting latency timer to 64
    [   25.271808] iwlagn 0000:0c:00.0: Detected Intel Wireless WiFi Link 5100AGN REV=0x54
    [   25.310856] iwlagn 0000:0c:00.0: Tunable channels: 13 802.11bg, 24 802.11a channels
    [   25.310932] iwlagn 0000:0c:00.0: irq 31 for MSI/MSI-X
    [78266.652117] iwlagn 0000:0c:00.0: restoring config space at offset 0xf (was 0x100, writing 0x10a)
    [78266.652159] iwlagn 0000:0c:00.0: restoring config space at offset 0x4 (was 0x4, writing 0xf1ffe004)
    [78266.652169] iwlagn 0000:0c:00.0: restoring config space at offset 0x3 (was 0x0, writing 0x10)
    [78266.652181] iwlagn 0000:0c:00.0: restoring config space at offset 0x1 (was 0x100000, writing 0x100106)

  2. #2
    Join Date
    Dec 2008
    Beans
    11

    Re: Wireless stopped working on 9.10 (Intel WiFi Link 5100)

    It worked again for a few days, but it is broken again now. But the good news is: there appears to be some logic behind when it does and doesn't work. It seems like the wireless connection works when the power adapter is connected and the battery is fully charged, at the moment when I boot the laptop. Once booted with wireless support, I can unplug the power adapter and wireless will keep working. But once booted without wireless, charging the battery only helps to enable Wifi if I reboot the laptop. Does this make any sense to someone? Is this expected behavior that might be changed in some configuration file somewhere?

  3. #3
    Join Date
    Nov 2007
    Beans
    6

    Re: Wireless stopped working on 9.10 (Intel WiFi Link 5100)

    Doesn't make a lot of sense but I can confirm the same issue with my dell latitude e6400. I knew it sometimes worked but hadn't figured it was the full battery, nice one!

  4. #4
    Join Date
    Mar 2010
    Beans
    1

    Re: Wireless stopped working on 9.10 (Intel WiFi Link 5100)

    Quote Originally Posted by croo View Post
    Doesn't make a lot of sense but I can confirm the same issue with my dell latitude e6400. I knew it sometimes worked but hadn't figured it was the full battery, nice one!
    I have this same problem.

    Is there a permenant fix?

    Now that my battery's maximum capacity has dropped due to age my wireless will not initialize at ALL.

  5. #5
    Join Date
    Dec 2008
    Beans
    11

    Re: Wireless stopped working on 9.10 (Intel WiFi Link 5100)

    I still have the same problem, but I'm no longer really convinced the battery level has that much to do with it. I never got it working without a fully charged battery, but I don't always get it to work when the battery is fully charged. I just reboot a few times and play with the switch a bit. And once it works, I leave the laptop powered on as long as possible. Is there really no one who has any suggestions that could help us figure out what the actual problem is?

  6. #6
    Join Date
    Apr 2008
    Beans
    332
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Wireless stopped working on 9.10 (Intel WiFi Link 5100)

    What does the ifconfig and iwconfig outputs spit out?

    how about uname -a?

    kernel of 2.6.25 or higher hopefully?

    ifconfig wmaster0 up

  7. #7
    Join Date
    Aug 2008
    Beans
    88
    Distro
    Ubuntu

    Re: Wireless stopped working on 9.10 (Intel WiFi Link 5100)

    confirmed on an hp pavilion dv7-3085dx kubuntu lucid.
    and an Intel WiFi Link 5100AGN card.
    have reinstalled 3 times, and rage quit until there is a fix.
    ~tak
    http://www.taksmind.org/
    irc.esper.net - tak
    irc.freenode.com - tak11

  8. #8
    Join Date
    Dec 2008
    Beans
    11

    Smile Re: Wireless stopped working on 9.10 (Intel WiFi Link 5100)

    I've got a workaround that hasn't failed me yet for over 2 weeks now. When I simply switch off wireless with the hardware switch before I boot and only switch it on again once the boot process is over, wireless works fine, regardless of the battery level and the mains connection.

    The workaround is good enough for me at the moment. But of course, it's still just a workaround. So I booted with the switch turned on (which resulted in non-working wireless) to post the requested command output, just in case this helps to find the root cause of the problem.

    Code:
    tijl@Smaug:~$ uname -a
    Linux Smaug 2.6.31-20-generic #58-Ubuntu SMP Fri Mar 12 04:38:19 UTC 2010 x86_64 GNU/Linux
    Code:
    tijl@Smaug:~$ ifconfig
    [sudo] password for tijl: 
    eth0      Link encap:Ethernet  HWaddr 00:24:e8:da:e6:90  
              UP BROADCAST 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)
              Memory:f6fe0000-f7000000 
    
    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:46 errors:0 dropped:0 overruns:0 frame:0
              TX packets:46 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:2448 (2.4 KB)  TX bytes:2448 (2.4 KB)
    
    virbr0    Link encap:Ethernet  HWaddr 72:e9:e6:a2:8c:18  
              inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:0 errors:0 dropped:0 overruns:0 frame:0
              TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:0 (0.0 B)  TX bytes:7082 (7.0 KB)
    Code:
    tijl@Smaug:~$ iwconfig
    lo        no wireless extensions.
    
    eth0      no wireless extensions.
    
    wmaster0  no wireless extensions.
    
    wlan0     IEEE 802.11abgn  ESSID:""  
              Mode:Managed  Frequency:2.412 GHz  Access Point: Not-Associated   
              Tx-Power=0 dBm   
              Retry  long limit:7   RTS thr:off   Fragment thr:off
              Encryption key:off                                                                                                                                                            
              Power Management:off                                                                                                                                                          
              Link Quality:0  Signal level:0  Noise level:0                                                                                                                                 
              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.
    
    virbr0    no wireless extensions.
    Code:
    tijl@Smaug:~$ sudo ifconfig wmaster0 up
    SIOCSIFFLAGS: Operation not supported

  9. #9
    Join Date
    Apr 2008
    Beans
    332
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Wireless stopped working on 9.10 (Intel WiFi Link 5100)

    virbr0 Link encap:Ethernet HWaddr 72:e9:e6:a2:8c:18
    inet addr:192.168.122.1
    vmware or virtualbox nat? Does that work correctly?

    wlan0 IEEE 802.11abgn ESSID:""
    Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
    looks like it's up and working.

    could be the wireless manager.

    iwlist wlan0 scan

    iwconfig wlan0 essid YOURWIRELESS key WIRELESS_PASSWORD

    dhclient wlan0

    You might have a problem if you are using wpa. I vaguely remember this doesnt work with wpa.

    If that first scan works though. Its not a problem with the card.

  10. #10
    Join Date
    Dec 2008
    Beans
    11

    Re: Wireless stopped working on 9.10 (Intel WiFi Link 5100)

    Quote Originally Posted by munky99999 View Post
    vmware or virtualbox nat? Does that work correctly?
    I used to run KVM/Qemu. That might be it. I stopped using it months ago but networking used to work fine from there.

    Quote Originally Posted by munky99999 View Post
    iwlist wlan0 scan
    Code:
    tijl@Smaug:~$ sudo iwlist wlan0 scan
    wlan0     Interface doesn't support scanning : Network is down
    Also, when wireless doesn't work, the WiFi LED is switched off. That makes it seem like a hardware issue, but it does still work in Windows. The LED will just flash on during the Windows boot process. While booting Ubuntu, it remains switched off (unless the battery is fully charged and the power plug is connected as I described earlier).

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