Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure - Kernel

This is a discussion on Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure - Kernel ; On Mon, 2008-10-27 at 18:02 -0700, Mirco Tischler wrote: > Hi > > I have problems connecting to wlan with my iwl4965 chip and 2.6.28-rc2 (didn't > test -rc1). Networkmanager just times out every time. > Only after playing around ...

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Thread: Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

  1. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Mon, 2008-10-27 at 18:02 -0700, Mirco Tischler wrote:
    > Hi
    >
    > I have problems connecting to wlan with my iwl4965 chip and 2.6.28-rc2 (didn't
    > test -rc1). Networkmanager just times out every time.
    > Only after playing around with rmmod/modprobe and killswitch I am sometimes
    > able to connect. But I cannot reproduce this reliably yet.
    >
    > This is what I get in dmesg (from modprobe iwlagn to connection failure):
    >
    > [ 1881.884690] iwlagn: Intel(R) Wireless WiFi Link AGN driver for
    > Linux,1.3.27kds
    > [ 1881.884692] iwlagn: Copyright(c) 2003-2008 Intel Corporation
    > [ 1881.884809] iwlagn 0000:06:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
    > [ 1881.884836] iwlagn 0000:06:00.0: setting latency timer to 64
    > [ 1881.884952] iwlagn: Detected Intel Wireless WiFi Link 4965AGN REV=0x4
    > [ 1881.935149] iwlagn: Tunable channels: 13 802.11bg, 19 802.11a channels
    > [ 1881.936327] phy4: Selected rate control algorithm 'iwl-agn-rs'
    > [ 1885.965591] iwlagn 0000:06:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
    > [ 1885.965874] iwlagn 0000:06:00.0: irq 41 for MSI/MSI-X
    > [ 1885.965974] iwlagn 0000:06:00.0: firmware: requesting iwlwifi-4965-2.ucode
    > [ 1886.181600] Registered led device: iwl-phy4:radio
    > [ 1886.181618] Registered led device: iwl-phy4:assoc
    > [ 1886.181635] Registered led device: iwl-phy4:RX
    > [ 1886.181654] Registered led device: iwl-phy4:TX
    > [ 1886.213631] ADDRCONF(NETDEV_UP): wlan0: link is not ready
    > [ 1887.572768] iwlagn: TX Power requested while scanning!


    Looks good so far. But I failed to see what are you trying to connect?
    Can you try "iwconfig wlan0 channnel <> essid <>"?

    > What might be related is this early on boot:
    >
    > [ 0.163009] cfg80211: Calling CRDA to update world regulatory domain
    > [ 0.163012] cfg80211: Failed calling CRDA
    > [ 0.163024] cfg80211: calling CRDA failed - unable to update world
    > regulatory domain, using static definition


    Does your AP work on A band?

    Thanks,
    -yi

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  2. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Tue, 28 Oct 2008 09:33:37 +0800, Zhu Yi wrote:
    >
    > Looks good so far. But I failed to see what are you trying to connect?
    > Can you try "iwconfig wlan0 channnel <> essid <>"?

    Sorry. I should have supplied that information on the first try. The network is
    a standard WPA-protected G-band network at 2.437Ghz (channel 6).
    That command seems to help a bit. At least I was able to connect more often
    after executing it. I will observe that in detail tomorrow though.
    >
    > Does your AP work on A band?
    >
    > Thanks,
    > -yi


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  3. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Mon, 2008-10-27 at 18:59 -0700, Mirco Tischler wrote:
    > > Looks good so far. But I failed to see what are you trying to

    > connect?
    > > Can you try "iwconfig wlan0 channnel <> essid <>"?

    > Sorry. I should have supplied that information on the first try. The
    > network is
    > a standard WPA-protected G-band network at 2.437Ghz (channel 6).
    > That command seems to help a bit. At least I was able to connect more
    > often after executing it.


    You don't need this command if wpa_supplicant works correctly. Is it a
    hidden SSID AP?

    Thanks,
    -yi

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  4. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Tue, 28 Oct 2008 10:19:50 +0800, Zhu Yi wrote:
    > You don't need this command if wpa_supplicant works correctly. Is it a
    > hidden SSID AP?

    No it isn't. Did I mention it worked well with 2.6.27?
    > Thanks,
    > -yi


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  5. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Tue, 28 Oct 2008 09:33:37 +0800
    Zhu Yi wrote:

    > On Mon, 2008-10-27 at 18:02 -0700, Mirco Tischler wrote:
    > > Hi
    > >
    > > I have problems connecting to wlan with my iwl4965 chip and
    > > 2.6.28-rc2 (didn't test -rc1). Networkmanager just times out every
    > > time. Only after playing around with rmmod/modprobe and killswitch
    > > I am sometimes able to connect. But I cannot reproduce this
    > > reliably yet.
    > >
    > > This is what I get in dmesg (from modprobe iwlagn to connection
    > > failure):
    > >
    > > [ 1881.884690] iwlagn: Intel(R) Wireless WiFi Link AGN driver for
    > > Linux,1.3.27kds
    > > [ 1881.884692] iwlagn: Copyright(c) 2003-2008 Intel Corporation
    > > [ 1881.884809] iwlagn 0000:06:00.0: PCI INT A -> GSI 18 (level,
    > > low) -> IRQ 18 [ 1881.884836] iwlagn 0000:06:00.0: setting latency
    > > timer to 64 [ 1881.884952] iwlagn: Detected Intel Wireless WiFi
    > > Link 4965AGN REV=0x4 [ 1881.935149] iwlagn: Tunable channels: 13
    > > 802.11bg, 19 802.11a channels [ 1881.936327] phy4: Selected rate
    > > control algorithm 'iwl-agn-rs' [ 1885.965591] iwlagn 0000:06:00.0:
    > > PCI INT A -> GSI 18 (level, low) -> IRQ 18 [ 1885.965874] iwlagn
    > > 0000:06:00.0: irq 41 for MSI/MSI-X [ 1885.965974] iwlagn
    > > 0000:06:00.0: firmware: requesting iwlwifi-4965-2.ucode
    > > [ 1886.181600] Registered led device: iwl-phy4:radio [ 1886.181618]
    > > Registered led device: iwl-phy4:assoc [ 1886.181635] Registered led
    > > device: iwl-phy4:RX [ 1886.181654] Registered led device:
    > > iwl-phy4:TX [ 1886.213631] ADDRCONF(NETDEV_UP): wlan0: link is not
    > > ready [ 1887.572768] iwlagn: TX Power requested while scanning!

    >
    > Looks good so far. But I failed to see what are you trying to connect?
    > Can you try "iwconfig wlan0 channnel <> essid <>"?
    >


    I had this same issue

    turning on CONFIG_WIRELESS_OLD_REGULATORY fixed it for me....

    --
    Arjan van de Ven Intel Open Source Technology Centre
    For development, discussion and tips for power savings,
    visit http://www.lesswatts.org
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  6. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Mon, 2008-10-27 at 22:32 -0600, Arjan van de Ven wrote:
    > I had this same issue
    >
    > turning on CONFIG_WIRELESS_OLD_REGULATORY fixed it for me....


    Arjan,

    This is a different bug. He has the wireless worked sometimes.

    I think your problem relates to 5GHz channel usage. We have already a
    patch queued to resolve the problem. We will have regulatory framework
    reworked to better solve the problem. But I guess it will be in .29 time
    frame.

    Thanks,
    -yi

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  7. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Tue, 28 Oct 2008 13:23:34 +0800, Zhu Yi wrote:
    > On Mon, 2008-10-27 at 22:32 -0600, Arjan van de Ven wrote:
    > > I had this same issue
    > >
    > > turning on CONFIG_WIRELESS_OLD_REGULATORY fixed it for me....

    >
    > Arjan,
    >
    > This is a different bug. He has the wireless worked sometimes.
    >
    > I think your problem relates to 5GHz channel usage. We have already a
    > patch queued to resolve the problem. We will have regulatory framework
    > reworked to better solve the problem. But I guess it will be in .29 time
    > frame.
    >
    > Thanks,
    > -yi

    I tested Arjan's solution nevertheless and it seems to do the job. I can't find
    the "TX Power requested" line anymore on dmesg output with that config option
    enabled anymore and it connects without problems.
    This is how it looks now:
    [ 777.680750] iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux,1.3..27kds
    [ 777.680753] iwlagn: Copyright(c) 2003-2008 Intel Corporation
    [ 777.680878] iwlagn 0000:06:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ18
    [ 777.680908] iwlagn 0000:06:00.0: setting latency timer to 64
    [ 777.680977] iwlagn: Detected Intel Wireless WiFi Link 4965AGN REV=0x4
    [ 777.731255] iwlagn: Tunable channels: 13 802.11bg, 19 802.11a channels
    [ 777.732432] phy1: Selected rate control algorithm 'iwl-agn-rs'
    [ 781.764539] iwlagn 0000:06:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ18
    [ 781.764821] iwlagn 0000:06:00.0: irq 41 for MSI/MSI-X
    [ 781.764919] iwlagn 0000:06:00.0: firmware: requesting iwlwifi-4965-2.ucode
    [ 781.980719] Registered led device: iwl-phy1:radio
    [ 781.980764] Registered led device: iwl-phy1:assoc
    [ 781.980808] Registered led device: iwl-phy1:RX
    [ 781.980856] Registered led device: iwl-phy1:TX
    [ 782.014001] ADDRCONF(NETDEV_UP): wlan0: link is not ready
    [ 783.633713] wlan0: authenticate with AP 00:c0:a8:e5:e5:a5
    [ 783.635637] wlan0: authenticated
    [ 783.635644] wlan0: associate with AP 00:c0:a8:e5:e5:a5
    [ 783.642770] wlan0: RX AssocResp from 00:c0:a8:e5:e5:a5 (capab=0x431 status=0
    aid=1)
    [ 783.642776] wlan0: associated [ 783.669684] ADDRCONF(NETDEV_CHANGE): wlan0:
    link becomes ready

    I tested it quickly and not very thoroughly on the wpa-eap encrypted network at
    university and it showed the same behaviour: no connection without
    CONFIG_WIRELESS_OLD_REGULATORY and no problems with it enabled.

    Thanks
    Mirco

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  8. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Tue, 2008-10-28 at 17:24 +0100, Mirco Tischler wrote:

    > > This is a different bug. He has the wireless worked sometimes.
    > >
    > > I think your problem relates to 5GHz channel usage. We have already a
    > > patch queued to resolve the problem. We will have regulatory framework
    > > reworked to better solve the problem. But I guess it will be in .29 time
    > > frame.
    > >
    > > Thanks,
    > > -yi

    > I tested Arjan's solution nevertheless and it seems to do the job. I can't find
    > the "TX Power requested" line anymore on dmesg output with that config option
    > enabled anymore and it connects without problems.


    Can we have a dmesg output with the "TX power requested" line posted
    here?

    johannes

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  9. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Tue, 2008-10-28 at 23:58 +0100, Mirco Tischler wrote:
    > On Tue, 28 Oct 2008 19:36:34 +0100, Johannes Berg wrote:
    > > Can we have a dmesg output with the "TX power requested" line posted
    > > here?


    > You mean the hole output? Cause I posted the wireless part in my initial mail.


    Sorry, I got confused, the initial mail is fine.

    johannes

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  10. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    In between I found out that suspend and hibernation are broken too. I would
    open a new thread but in the "Suspend to RAM regression in 2.6.28-rc2
    (bisected)" thread that handled a similar problem iwlwifi was blamed, at least
    in the mails I read. So maybe this is related here too.

    The machine suspends and hibernates fine, but doesn't wake up anymore correctly.
    On hibernation I end up with a black screen and only the mouse which I can
    still move. But anything else is locked up. I can't switch to virtual console
    with ctrl+alt+f? nor can I restart the xserver. I can't even connect on
    network. The only thing I can do is move the mouse on a black screen or push
    the power button.

    On suspend it is a little better. After wakeup I see the frames of the windows
    but not the content, and the gnome panel. And again I can move the mouse but I
    can't interact with anything. At least I can connect over network using ssh.
    But processes like compiz don't respond to kill -9 PID and when I try to kill
    Xorg the machine completely locks up.

    Another thing that I just noticed is very slow boot. From startup of udev until
    short before X starts the boot lasts minutes. What I noticed is that there are
    long phases of no hard disk activity. And I don't really have the heart to
    write this but I have the impression that keyboard activity (i.e. pressing
    random keys) causes the harddisk to read again and the hole boot to go on.

    Sorry for this long subjective description of symptoms only without any
    kernel messages or anything but that's all I can deliver at the moment. Maybe
    tomorrow I find more than only half an hour to dig into this.

    Thanks again

    Mirco

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  11. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Wed, 2008-10-29 at 00:24 +0800, Mirco Tischler wrote:
    >
    > I tested it quickly and not very thoroughly on the wpa-eap encrypted
    > network at
    > university and it showed the same behaviour: no connection without
    > CONFIG_WIRELESS_OLD_REGULATORY and no problems with it enabled.


    Interesting. The only difference between without and with
    CONFIG_WIRELESS_OLD_REGULATORY is the txpower is lower and you can only
    do passive scan. Can you try attached patch?

    Thanks,
    -yi


  12. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Wed, 29 Oct 2008 14:18:04 +0800, Zhu Yi wrote:
    > Can you try attached patch?
    >
    > Thanks,
    > -yi

    I did. Didn't solve the problems but here's the output:
    [ 880.195147] iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux,1.3..27kds
    [ 880.195150] iwlagn: Copyright(c) 2003-2008 Intel Corporation
    [ 880.195300] iwlagn 0000:06:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ18
    [ 880.195327] iwlagn 0000:06:00.0: setting latency timer to 64
    [ 880.195444] iwlagn: Detected Intel Wireless WiFi Link 4965AGN REV=0x4
    [ 880.245264] iwlagn: Tunable channels: 13 802.11bg, 19 802.11a channels
    [ 880.247969] phy3: Selected rate control algorithm 'iwl-agn-rs'
    [ 884.274477] iwlagn 0000:06:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ18
    [ 884.275247] iwlagn 0000:06:00.0: irq 41 for MSI/MSI-X
    [ 884.275361] iwlagn 0000:06:00.0: firmware: requesting iwlwifi-4965-2.ucode
    [ 884.489886] Registered led device: iwl-phy3:radio
    [ 884.489933] Registered led device: iwl-phy3:assoc
    [ 884.489973] Registered led device: iwl-phy3:RX
    [ 884.490012] Registered led device: iwl-phy3:TX
    [ 884.526082] ADDRCONF(NETDEV_UP): wlan0: link is not ready
    [ 884.784601] iwlagn: TX Power requested while scanning!
    [ 884.784611] Pid: 9839, comm: iwlagn/1 Not tainted 2.6.28-rc2-oldreg-debug #27
    [ 884.784617] Call Trace:
    [ 884.784632] [] ? native_smp_send_reschedule+0x4d/0x4f
    [ 884.784658] [] iwl4965_send_tx_power+0x5a/0xf2f [iwlagn]
    [ 884.784668] [] ? _spin_unlock_irqrestore+0x31/0x3c
    [ 884.784677] [] ? try_to_wake_up+0x222/0x234
    [ 884.784685] [] ? default_wake_function+0xd/0xf
    [ 884.784693] [] ? autoremove_wake_function+0x11/0x38
    [ 884.784703] [] ? __wake_up_common+0x46/0x76
    [ 884.784710] [] ? _spin_unlock_irqrestore+0x31/0x3c
    [ 884.784717] [] ? __wake_up+0x43/0x4f
    [ 884.784725] [] ? queue_work+0x59/0x68
    [ 884.784735] [] ?ieee80211_mlme_notify_scan_completed+0xc7/0xd9
    [ 884.784743] [] ? ieee80211_scan_completed+0x2e8/0x32c
    [ 884.784770] [] ? iwl_rx_queue_restock+0xc6/0x143 [iwlcore]
    [ 884.784790] [] iwl_set_tx_power+0x6b/0x71 [iwlcore]
    [ 884.784812] [] iwl_bg_scan_completed+0xbc/0xcd [iwlcore]
    [ 884.784834] [] ? iwl_bg_scan_completed+0x0/0xcd [iwlcore]
    [ 884.784842] [] run_workqueue+0x95/0x138
    [ 884.784849] [] worker_thread+0xf5/0x109
    [ 884.784856] [] ? autoremove_wake_function+0x0/0x38
    [ 884.784864] [] ? worker_thread+0x0/0x109
    [ 884.784871] [] kthread+0x49/0x76
    [ 884.784879] [] child_rip+0xa/0x11
    [ 884.784886] [] ? kthread+0x0/0x76
    [ 884.784892] [] ? child_rip+0x0/0x11

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  13. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Thu, 2008-10-30 at 10:24 -0700, Mirco Tischler wrote:
    > On Wed, 29 Oct 2008 14:18:04 +0800, Zhu Yi wrote:
    > > Can you try attached patch?
    > >
    > > Thanks,
    > > -yi

    > I did. Didn't solve the problems but here's the output:


    That helped us to obtain more information. Could you please try commit
    9685e33a2c919c1e95cb7072988fc1e0f0bad3d9 ?

    Reproduced here for convenience:

    commit 9685e33a2c919c1e95cb7072988fc1e0f0bad3d9
    Author: Mohamed Abbas
    Date: Thu Oct 23 23:48:54 2008 -0700

    iwlwifi: clear scanning bits upon failure

    In iwl_bg_request_scan function, if we could not send a
    scan command it will go to done.
    In done it does the right thing to call mac80211 with
    scan complete, but the problem is STATUS_SCAN_HW is still
    set causing any future scan to fail. Fix by clearing the scanning status
    bits if scan fails.

    Signed-off-by: Mohamed Abbas
    Signed-off-by: Reinette Chatre
    Signed-off-by: John W. Linville

    diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
    index 3379b41..b0abf89 100644
    --- a/drivers/net/wireless/iwlwifi/iwl-scan.c
    +++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
    @@ -834,6 +834,13 @@ static void iwl_bg_request_scan(struct work_struct *data)
    return;

    done:
    + /* Cannot perform scan. Make sure we clear scanning
    + * bits from status so next scan request can be performed.
    + * If we don't clear scanning status bit here all next scan
    + * will fail
    + */
    + clear_bit(STATUS_SCAN_HW, &priv->status);
    + clear_bit(STATUS_SCANNING, &priv->status);
    /* inform mac80211 scan aborted */
    queue_work(priv->workqueue, &priv->scan_completed);
    mutex_unlock(&priv->mutex);



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  14. Re: [2.6.28-rc2]: iwl4965 doesn't connect / cfg80211 failure

    On Thu, 30 Oct 2008 10:55:38 -0700, reinette chatre wrote:
    >
    > That helped us to obtain more information. Could you please try commit
    > 9685e33a2c919c1e95cb7072988fc1e0f0bad3d9 ?
    >

    Solves the problem for me.

    Thanks

    Mirco

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