[Bug 1004146] [NEW] Wireless disconnects after running hci_inquiry for approximately 1 minute

Thu May 24 20:08:27 UTC 2012

Public bug reported:

After starting a simple program that does nothing but call hci_inquiry()
in a loop (code below), my wireless will disconnect after a couple
minutes.  This happens consistently.

After it disconnects, the wireless will not be able to reconnect as long
as the test program is running, but as soon as I kill the program, the
wireless immediately reconnects.

With a ~four second inquiry period, the problem manifested on five
consecutive runs after 1:48, 1:09, 1:43, 0:33, and 1:04.

hcidump didn't show any difference between the period it was working and
the period during/after it stopped working.

Tailing /var/log/syslog showed the problem manifesting:

May 24 12:59:06 laptop kernel: [13770.612763] No probe response from AP 00:23:69:f0:be:fd after 500ms, disconnecting.
May 24 12:59:06 laptop kernel: [13770.645859] iwlagn 0000:03:00.0: ACTIVATE a non DRIVER active station id 0 addr 00:23:69:f0:be:fd
May 24 12:59:06 laptop wpa_supplicant[1053]: CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys
May 24 12:59:06 laptop NetworkManager: <info>  (wlan0): supplicant connection state:  completed -> disconnected
May 24 12:59:06 laptop kernel: [13770.713662] cfg80211: All devices are disconnected, going to restore regulatory settings
May 24 12:59:06 laptop kernel: [13770.713672] cfg80211: Restoring regulatory settings
May 24 12:59:06 laptop kernel: [13770.713677] cfg80211: Calling CRDA to update world regulatory domain
May 24 12:59:06 laptop kernel: [13770.716912] cfg80211: World regulatory domain updated:
May 24 12:59:06 laptop kernel: [13770.716917]     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
May 24 12:59:06 laptop kernel: [13770.716922]     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May 24 12:59:06 laptop kernel: [13770.716927]     (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
May 24 12:59:06 laptop kernel: [13770.716931]     (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
May 24 12:59:06 laptop kernel: [13770.716935]     (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May 24 12:59:06 laptop kernel: [13770.716939]     (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May 24 12:59:06 laptop NetworkManager: <info>  (wlan0): supplicant connection state:  disconnected -> scanning
May 24 12:59:08 laptop sudo: pam_sm_authenticate: Called
May 24 12:59:08 laptop sudo: pam_sm_authenticate: username = [username]
May 24 12:59:09 laptop wpa_supplicant[1053]: WPS-AP-AVAILABLE 
May 24 12:59:09 laptop wpa_supplicant[1053]: Trying to associate with 00:23:69:f0:be:fd (SSID='SSID' freq=2412 MHz)
May 24 12:59:09 laptop NetworkManager: <info>  (wlan0): supplicant connection state:  scanning -> associating
May 24 12:59:09 laptop kernel: [13773.204740] wlan0: authenticate with 00:23:69:f0:be:fd (try 1)
May 24 12:59:09 laptop kernel: [13773.403649] wlan0: authenticate with 00:23:69:f0:be:fd (try 2)
May 24 12:59:09 laptop kernel: [13773.603295] wlan0: authenticate with 00:23:69:f0:be:fd (try 3)
May 24 12:59:09 laptop kernel: [13773.803893] wlan0: authentication with 00:23:69:f0:be:fd timed out
May 24 12:59:15 laptop NetworkManager: <debug> [1337889555.000702] periodic_update(): Roamed from BSSID 00:23:69:F0:BE:FD (SSID) to (none) ((none))

The test program I'm using is as follows:

#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>

int main()
{
    inquiry_info info[255];

    while (true)
    {
        //Causes wireless to disconnect after approx. 1 minute of running.
        int num_devices = hci_inquiry(-1, 3, 255, NULL, (inquiry_info**)(&info), 0);
    }

    return 0;
}

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: bluetooth (not installed)
ProcVersionSignature: Ubuntu 2.6.35-32.68~lucid1-generic 2.6.35.14
Uname: Linux 2.6.35-32-generic i686
Architecture: i386
Date: Thu May 24 12:46:17 2012
InterestingModules: rfcomm sco bnep l2cap btusb bluetooth
MachineType: Dell Inc. Studio 1569
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-32-generic root=UUID=f57436af-f3ea-4ac7-a95e-eb3e60dd946e ro quiet splash
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: bluez
dmi.bios.date: 10/18/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 0R225F
dmi.board.vendor: Dell Inc.
dmi.board.version: A08
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A08
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd10/18/2010:svnDellInc.:pnStudio1569:pvrA08:rvnDellInc.:rn0R225F:rvrA08:cvnDellInc.:ct8:cvrA08:
dmi.product.name: Studio 1569
dmi.product.version: A08
dmi.sys.vendor: Dell Inc.
hciconfig:
 hci0:	Type: BR/EDR  Bus: USB
 	BD Address: 90:4C:E5:FB:C9:9A  ACL MTU: 1021:8  SCO MTU: 64:1
 	UP RUNNING PSCAN ISCAN 
 	RX bytes:2808 acl:0 sco:0 events:435 errors:0
 	TX bytes:2230 acl:0 sco:0 commands:232 errors:0
syslog:

** Affects: bluez (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: apport-bug i386 lucid

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https://bugs.launchpad.net/bugs/1004146

Title:
  Wireless disconnects after running hci_inquiry for approximately 1
  minute

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