Hi,
a new Thinkpad Yoga 20CD00AMGE with Intel(R) Dual Band Wireless AC 7260
fails to connect to the AP in the office, while it works
on my home AP. WPA2 is used in both cases. I tried with
kernel 3.14.7 and 3.15. There is a high density of APs and
clients and lots of traffic in the office environment.
The failure is caused by:
[ 32.200142] iwlwifi 0000:04:00.0: No association and the time event is over already...
and wpa_supplicant retries in an endless loop:
[ 28.181020] cfg80211: Calling CRDA to update world regulatory domain
[ 31.890168] wlp4s0: authenticate with f8:d1:11:39:1a:8c
[ 31.892972] wlp4s0: send auth to f8:d1:11:39:1a:8c (try 1/3)
[ 31.903458] wlp4s0: authenticated
[ 31.927239] wlp4s0: associate with f8:d1:11:39:1a:8c (try 1/3)
[ 31.963374] wlp4s0: RX AssocResp from f8:d1:11:39:1a:8c (capab=0x431 status=0 aid=5)
[ 31.968857] wlp4s0: associated
[ 32.200142] iwlwifi 0000:04:00.0: No association and the time event is over already...
[ 32.200154] wlp4s0: Connection to AP f8:d1:11:39:1a:8c lost
[ 32.270241] cfg80211: Calling CRDA to update world regulatory domain
(repeats)
For testing I used a bare Arch Linux installation and ran
wpa_supplicant manually:
echo 'network={
ssid="foo"
psk="bar"
}' >w
wpa_supplicant -Dnl80211 -iwlp4s0 -cw -d
...
wlp4s0: State: ASSOCIATED -> 4WAY_HANDSHAKE
...
wlp4s0: WPA: Key negotiation completed with f8:d1:11:39:1a:8c [PTK=CCMP GTK=CCMP]
...
wlp4s0: CTRL-EVENT-CONNECTED - Connection to f8:d1:11:39:1a:8c completed [id=0 id_str=]
...
nl80211: Drv Event 20 (NL80211_CMD_DEL_STATION) received for wlp4s0
nl80211: Delete station f8:d1:11:39:1a:8c
nl80211: Drv Event 39 (NL80211_CMD_DEAUTHENTICATE) received for wlp4s0
nl80211: Deauthenticate event
wlp4s0: Event DEAUTH (12) received
wlp4s0: Deauthentication notification
wlp4s0: * reason 4 (locally generated)
wlp4s0: * address f8:d1:11:39:1a:8c
Deauthentication frame IE(s) - hexdump(len=0): [NULL]
wlp4s0: CTRL-EVENT-DISCONNECTED bssid=f8:d1:11:39:1a:8c reason=4 locally_generated=1
wlp4s0: Auto connect enabled: try to reconnect (wps=0 wpa_state=9)
Not really knowing what I'm doing I simply tried to comment out
the check causing the disconnect:
drivers/net/wireless/iwlwifi/mvm/time-event.c:iwl_mvm_te_handle_notif()
iwl_mvm_te_check_disconnect(mvm, te_data->vif,
"No association and the time event is over already...");
And lo and behold, it can connect.
Let me know if you need more information to produce a proper fix.
TIA,
Johannes
Hi,
On Fri, Jun 13, 2014 at 12:54:13PM +0200, Johannes Stezenbach wrote:
> a new Thinkpad Yoga 20CD00AMGE with Intel(R) Dual Band Wireless AC 7260
> fails to connect to the AP in the office, while it works
> on my home AP. WPA2 is used in both cases. I tried with
> kernel 3.14.7 and 3.15. There is a high density of APs and
> clients and lots of traffic in the office environment.
I have confirmation someone on the other side of the globe with
a similar machine sees the same issue.
> [ 31.890168] wlp4s0: authenticate with f8:d1:11:39:1a:8c
> [ 31.892972] wlp4s0: send auth to f8:d1:11:39:1a:8c (try 1/3)
> [ 31.903458] wlp4s0: authenticated
> [ 31.927239] wlp4s0: associate with f8:d1:11:39:1a:8c (try 1/3)
> [ 31.963374] wlp4s0: RX AssocResp from f8:d1:11:39:1a:8c (capab=0x431 status=0 aid=5)
> [ 31.968857] wlp4s0: associated
> [ 32.200142] iwlwifi 0000:04:00.0: No association and the time event is over already...
> [ 32.200154] wlp4s0: Connection to AP f8:d1:11:39:1a:8c lost
Some more detail from dmesg:
[ 1.161462] iwlwifi 0000:04:00.0: irq 61 for MSI/MSI-X
[ 1.164277] iwlwifi 0000:04:00.0: loaded firmware version 22.24.8.0 op_mode iwlmvm
[ 1.180348] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144
[ 1.180651] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
[ 1.180885] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
lspci -vn:
04:00.0 0280: 8086:08b2 (rev 83)
Subsystem: 8086:4270
Full lspci -vvv output attached.
I also tried "iw dev wlp4s0 set power_save off", it did not help.
> drivers/net/wireless/iwlwifi/mvm/time-event.c:iwl_mvm_te_handle_notif()
>
> iwl_mvm_te_check_disconnect(mvm, te_data->vif,
> "No association and the time event is over already...");
>
> And lo and behold, it can connect.
>
> Let me know if you need more information to produce a proper fix.
TIA,
Johannes
On Mon, Jun 16, 2014 at 12:33:25PM +0000, Grumbach, Emmanuel wrote:
> Please open a bugzilla on kernel.org and CC [email protected]
> This issue is not something I can fix on the spot through mailing list, and I'd like to be able to track it.
Done:
https://bugzilla.kernel.org/show_bug.cgi?id=78101
Thanks,
Johannes
>
> Hi,
>
> On Fri, Jun 13, 2014 at 12:54:13PM +0200, Johannes Stezenbach wrote:
> > a new Thinkpad Yoga 20CD00AMGE with Intel(R) Dual Band Wireless AC
> > 7260 fails to connect to the AP in the office, while it works on my
> > home AP. WPA2 is used in both cases. I tried with kernel 3.14.7 and
> > 3.15. There is a high density of APs and clients and lots of traffic
> > in the office environment.
>
> I have confirmation someone on the other side of the globe with a similar
> machine sees the same issue.
>
> > [ 31.890168] wlp4s0: authenticate with f8:d1:11:39:1a:8c
> > [ 31.892972] wlp4s0: send auth to f8:d1:11:39:1a:8c (try 1/3)
> > [ 31.903458] wlp4s0: authenticated
> > [ 31.927239] wlp4s0: associate with f8:d1:11:39:1a:8c (try 1/3)
> > [ 31.963374] wlp4s0: RX AssocResp from f8:d1:11:39:1a:8c (capab=0x431
> status=0 aid=5)
> > [ 31.968857] wlp4s0: associated
> > [ 32.200142] iwlwifi 0000:04:00.0: No association and the time event is over
> already...
> > [ 32.200154] wlp4s0: Connection to AP f8:d1:11:39:1a:8c lost
>
What is the beacon interval on these access point?
Please open a bugzilla on kernel.org and CC [email protected]
This issue is not something I can fix on the spot through mailing list, and I'd like to be able to track it.
Thanks.
> Some more detail from dmesg:
>
> [ 1.161462] iwlwifi 0000:04:00.0: irq 61 for MSI/MSI-X
> [ 1.164277] iwlwifi 0000:04:00.0: loaded firmware version 22.24.8.0
> op_mode iwlmvm
> [ 1.180348] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC
> 7260, REV=0x144
> [ 1.180651] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
> [ 1.180885] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
>
> lspci -vn:
>
> 04:00.0 0280: 8086:08b2 (rev 83)
> Subsystem: 8086:4270
>
> Full lspci -vvv output attached.
>
>
> I also tried "iw dev wlp4s0 set power_save off", it did not help.
>
>
> > drivers/net/wireless/iwlwifi/mvm/time-
> event.c:iwl_mvm_te_handle_notif(
> > )
> >
> > iwl_mvm_te_check_disconnect(mvm, te_data->vif,
> > "No association and the time event is over
> > already...");
> >
> > And lo and behold, it can connect.
> >
> > Let me know if you need more information to produce a proper fix.
>
>
> TIA,
> Johannes