Intel PRO/Wireless 4965 AGN deactivates

Bug #216634 reported by Simply Seth
38
This bug affects 7 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Incomplete
Medium
Unassigned

Bug Description

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=7.10
DISTRIB_CODENAME=gutsy
DISTRIB_DESCRIPTION="Ubuntu 7.10"
------

After some time the wireless device deactivates.

-------
LSPCI
-------
0c:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN Network Connection (rev 61)
        Subsystem: Intel Corporation Unknown device 1120
        Flags: bus master, fast devsel, latency 0, IRQ 17
        Memory at f9ffe000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: <access denied>

-------
DMESG
-------

[16422.772328] wlan0: RX deauthentication from 00:11:50:72:f7:42 (reason=1)
[16422.772334] wlan0: deauthenticated
[16423.771871] wlan0: authenticate with AP 00:11:50:72:f7:42
[16423.972088] wlan0: authenticate with AP 00:11:50:72:f7:42
[16424.171144] wlan0: authenticate with AP 00:11:50:72:f7:42
[16424.371696] wlan0: authentication with AP 00:11:50:72:f7:42 timed out
[16451.533147] rtc: lost 1 interrupts
[16878.885803] rtc: lost 1 interrupts
[17478.296325] rtc: lost 1 interrupts
[18077.706832] rtc: lost 1 interrupts
[18677.118351] rtc: lost 1 interrupts
[19276.527890] rtc: lost 1 interrupts
[19875.938379] rtc: lost 1 interrupts
[20475.349797] rtc: lost 1 interrupts
[21074.760395] rtc: lost 2 interrupts
[21674.169913] rtc: lost 1 interrupts
[21865.396848] rtc: lost 1 interrupts
[21904.919514] rtc: lost 2 interrupts
[22007.753826] rtc: lost 1 interrupts
[22273.580454] rtc: lost 1 interrupts
[22872.990959] rtc: lost 1 interrupts
[23472.402466] rtc: lost 1 interrupts
[24071.812141] rtc: lost 1 interrupts
[24671.222499] rtc: lost 1 interrupts
[25270.633908] rtc: lost 1 interrupts
[25870.043511] rtc: lost 2 interrupts
[26469.455030] rtc: lost 2 interrupts
[27068.865545] rtc: lost 1 interrupts
[27205.411854] rtc: lost 1 interrupts
[27668.275500] rtc: lost 1 interrupts
[28267.686101] rtc: lost 1 interrupts
[28517.917321] rtc: lost 1 interrupts
[28867.096237] rtc: lost 1 interrupts
[29466.509716] rtc: lost 3 interrupts
[29602.605648] rtc: lost 1 interrupts
[29632.638152] rtc: lost 8 interrupts
[29928.090433] rtc: lost 1 interrupts
[30039.953967] rtc: lost 1 interrupts
[30065.917122] rtc: lost 1 interrupts
[30201.909885] rtc: lost 1 interrupts
[30231.903818] rtc: lost 7 interrupts
[30665.328054] rtc: lost 1 interrupts
[30831.203256] rtc: lost 6 interrupts
[31264.739134] rtc: lost 2 interrupts
[31864.148975] rtc: lost 1 interrupts

Revision history for this message
Simply Seth (sethrei) wrote :

Kernel
-------
2.6.22-14-rt
linux-ubuntu-modules-2.6.22-14-rt (2.6.22-14.37)

Revision history for this message
Simply Seth (sethrei) wrote :

All This happened after I did a recent update.

A side issue that happened was that my External soundcard (usb-snd) stopped working until I compiled the latest stable alsa drivers.

Revision history for this message
Brian Murray (brian-murray) wrote : Package assigned

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage. I have classified this bug as a bug in linux.

Revision history for this message
Brian Murray (brian-murray) wrote : Need more information

Please include the output of the command 'uname -a' in your next response. It should be one, long line of text which includes the exact kernel version you're running, as well as the CPU architecture.
2. Please run the command 'dmesg > dmesg.log' and attach the resulting file 'dmesg.log' to this bug report.
3. Please run the command 'sudo lspci -vvnn > lspci-vvnn.log' and attach the resulting file 'lspci-vvnn.log' to this bug report.
For your reference, the full description of procedures for kernel-related bug reports is available at https://wiki.ubuntu.com/KernelTeamBugPolicies . Thanks in advance!

Revision history for this message
Leann Ogasawara (leannogasawara) wrote :

The Ubuntu Kernel Team is planning to move to the 2.6.27 kernel for the upcoming Intrepid Ibex 8.10 release. As a result, the kernel team would appreciate it if you could please test this newer 2.6.27 Ubuntu kernel. There are one of two ways you should be able to test:

1) If you are comfortable installing packages on your own, the linux-image-2.6.27-* package is currently available for you to install and test.

--or--

2) The upcoming Alpha5 for Intrepid Ibex 8.10 will contain this newer 2.6.27 Ubuntu kernel. Alpha5 is set to be released Thursday Sept 4. Please watch http://www.ubuntu.com/testing for Alpha5 to be announced. You should then be able to test via a LiveCD.

Please let us know immediately if this newer 2.6.27 kernel resolves the bug reported here or if the issue remains. More importantly, please open a new bug report for each new bug/regression introduced by the 2.6.27 kernel and tag the bug report with 'linux-2.6.27'. Also, please specifically note if the issue does or does not appear in the 2.6.26 kernel. Thanks again, we really appreicate your help and feedback.

Revision history for this message
zpon (zpon-dk) wrote :

I have recently updated to Intrepid to check another bug (#182931) and can confirm that I still have the problem with my 4965. Just today I have had the problem twice in about two (now tree) or tree hours, normally a reboot brings the network card running again, but I have also figured out that if I deactivate the wireless (Fn+F5) and activates it again, and remove some of the iwl* modules I have (iwl3945, iwlang and iwlcore) and add them back, with modprobe, I can sometimes get it up and running again (maybe sudo /etc/init.d/networking restart is needed, but I am not sure).

How come I suddenly do not have a iwl4965 module any more? I used to have one in 7.04

Hope this could be of some help.

PS. My in 7.04 I had problem with connection speed, this seems to be fixed now :-)

$ uname -a
Linux zpon-laptop 2.6.27-7-generic #1 SMP Fri Oct 24 06:40:41 UTC 2008 x86_64 GNU/Linux

Revision history for this message
Brian Murray (brian-murray) wrote :

We are closing this bug report as it lacks the information, described in the previous comments, we need to investigate the problem further. However, please reopen it if you can give us the missing information and feel free to submit bug reports in the future.

Changed in linux:
status: Incomplete → Invalid
Revision history for this message
zpon (zpon-dk) wrote :

dmesg.log

Revision history for this message
zpon (zpon-dk) wrote :

I have now attached dmesg.log and lspci-vvnn.log, any further information needed?

Changed in linux:
status: Invalid → Incomplete
Revision history for this message
zpon (zpon-dk) wrote :

Sorry about the double post, but in my post above (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/216634/comments/6) I have written 7.04 it should of cause be 8.40

Revision history for this message
zpon (zpon-dk) wrote :

* 8.04 sorry :(

Revision history for this message
Leann Ogasawara (leannogasawara) wrote :

If running Intrepid, please try installing the linux-backports-modules-intrepid package and see if it helps. It contains an updated compat-wireless stack. Please let us know your results. Thanks.

Revision history for this message
zpon (zpon-dk) wrote :

I do. Yesterday I installed linux-backports-modules-intrepid, and today I have had to breakdowns. Both times I have lost my connection like I have so often before, then I write sudo iwlist wlan0 scan, just to be sure, and it didn't terminate or return anything, and then I try to click on network manager applet, and all freezes up, and the can do almost nothing. The light doesn't even come on when I push CapsLock (oddly it does when push NumLock), the only thing I can do is restart X (with ctrl+alt+backspace), but that just brings me to terminal where nothing seems to happen, and I have to stop the computer by holding down the start button for 10 seconds.

Normally when I loose the connection, I am able to use sudo iwlist wlan0 scan (with no result but an error message saying something about not being able to find anything or that the network card didn't respond, or something like that, I cant really remember), and do modprob -r iwlagn and modprobe iwlang, and bring the connection up again.

Let me know if you need more info

Revision history for this message
zpon (zpon-dk) wrote :

A small update
The freeze I described above seems to happen when I need su access, if I try anything with sudo it never terminates, fx sudo ls just keeps going, and ctrl+c doesn't kill it either

Changed in linux:
assignee: nobody → ubuntu-kernel-team
importance: Undecided → Medium
status: Incomplete → Triaged
Revision history for this message
zpon (zpon-dk) wrote :

I just had a small fallout, I was streaming music which started repeating the same small part fast, and the touchpad became in-responsive, both has happened before when the wireless network has stoped working. However, this time networkmanager managed to reconnect automatically. In my kernel.log I got this:

Dec 11 15:52:18 zpon-laptop kernel: [ 4080.740965] iwlagn: Can not allocate SKB buffers
Dec 11 15:52:19 zpon-laptop kernel: [ 4082.517608] iwlagn: Can not allocate SKB buffers
Dec 11 15:57:03 zpon-laptop kernel: [ 4362.769982] iwlagn: Microcode SW error detected. Restarting 0x82000000.
Dec 11 15:57:03 zpon-laptop kernel: [ 4364.759527] psmouse.c: TouchPad at isa0060/serio1/input0 lost synchronization, throwing 1 bytes away.
Dec 11 15:57:03 zpon-laptop kernel: [ 4364.763454] iwlagn: Can't stop Rx DMA.
Dec 11 15:57:03 zpon-laptop kernel: [ 4365.764953] iwlagn: request scan called when driver not ready.
Dec 11 15:57:03 zpon-laptop kernel: [ 4365.768097] wlan0: failed to restore operational channel after scan
Dec 11 15:57:03 zpon-laptop kernel: [ 4365.823523] psmouse.c: resync failed, issuing reconnect request
Dec 11 15:57:03 zpon-laptop kernel: [ 4366.269046] iwlagn: Error sending REPLY_TX_PWR_TABLE_CMD: time out after 500ms.
Dec 11 15:57:03 zpon-laptop kernel: [ 4366.281621] iwlagn: Microcode SW error detected. Restarting 0x2000000.

It was at 15.57 I first noticed something wrong. I hope this might help

Revision history for this message
zpon (zpon-dk) wrote :

I just got this error:

Dec 12 21:39:59 zpon-laptop kernel: [ 1019.153596] iwlagn: HARDWARE GONE?? INTA == 0x000000000000000000000000000000000000000000000000000000000000000000000000ffffffff

which seems to be related to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/179698
see attached kernel.log

Revision history for this message
Launchpad Janitor (janitor) wrote : Kernel team bugs

Per a decision made by the Ubuntu Kernel Team, bugs will longer be assigned to the ubuntu-kernel-team in Launchpad as part of the bug triage process. The ubuntu-kernel-team is being unassigned from this bug report. Refer to https://wiki.ubuntu.com/KernelTeamBugPolicies for more information. Thanks.

Revision history for this message
Jeremy Foshee (jeremyfoshee) wrote :

Unfortunately it seems this bug is still an issue. Can you confirm this issue exists with the most recent Jaunty Jackalope 9.04 release - http://www.ubuntu.com/news/ubuntu-9.04-desktop .

Also, Can you please try installing the linux-backports-modules-jaunty package. The linux-backports-modules-jaunty package contains and updated compat-wireless stack which may help. Be sure to reboot after installing this package in order to test. Please let us know your results.

If the issue remains even after installing and testing linux-backports-modules-jaunty, could you then please try the latest upstream compat-wireless stack. See http://wireless.kernel.org/en/users/Download for more info. If the issue exists upstream, we'll want to work with the upstream developers to try to get this resolved. Also, after confirming the issue remains with the latest upstream compat-wireless stack, be sure to also run the following command from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux-image-2.6.28-11-generic 216634

Please let us know your results. Thanks.

-JFo

Changed in linux (Ubuntu):
status: Triaged → Incomplete
tags: added: compat-wireless needs-kernel-logs
tags: added: needs-upstream-testing
Revision history for this message
zpon (zpon-dk) wrote :

I installed linux-backports-modules-jaunty for about a month ago, but I still have fall outs, specially whit intense downloads.
I am currently building http://wireless.kernel.org/download/compat-wireless-2.6/compat-wireless-2.6.tar.bz2 (was this the one you were refering to in your post Jeremy Foshee?)

Revision history for this message
zpon (zpon-dk) wrote :

The file above gave me kernel panic each time I booted. Unfortunately i didn't recover any entries in the logs about this kernel panic.

Revision history for this message
Eric Miao (eric.y.miao) wrote :

Hi zpon,

This looks to me quite similar to the bug of http://intellinuxwireless.org/bugzilla/show_bug.cgi?id=1842, and the corresponding fix has been already merged in latest linux-backports-modules-jaunty. Could you confirm that it has the same symptom as you described in 2008-12-11 (checking dmesg to see if there are still skb_allocate failures)? Thanks.

Revision history for this message
zpon (zpon-dk) wrote :

Eric Miao I don't know if that is still the case, but I will keep a look out fore it.

I have attached dmesg log of a connection error, and some notes describing where the error was spotted.

Revision history for this message
u20 (jacquescortelyou) wrote :

If anyone has a suggestion to fix this please help. I am using the PRO/Wireless 4965 AG or AGN [Kedron] on a dell m6300 running 9.04 Jaunty and constantly lose my wifi connection. I tried installing wicd to manage the signals which seems to help a little but the connection loss still occurs. I'll provide data if someone asks (still a little new).

Revision history for this message
AioroS (brung82) wrote :

Hi, I have the same problem. My wifi card is PRO/Wireless 4965 AGN on a Dell XPS M1530 and after a random time I lose my connection. I have installed WICD instead of Network manager and loss of connection are less frequent. I'll provide data if someone asks. If exists a solution please publish, thanks.

Revision history for this message
u20 (jacquescortelyou) wrote : Re: [Bug 216634] Re: Intel PRO/Wireless 4965 AGN deactivates
Download full text (3.3 KiB)

I tried installing the linux backports that didn't seem to do anything
either. I am definately thinking that this is a kernal issue, and hope that
this will be corrected. PLEASE let me know if you find anything else.

-jacques

On Mon, Aug 10, 2009 at 6:02 AM, AioroS <email address hidden> wrote:

> Hi, I have the same problem. My wifi card is PRO/Wireless 4965 AGN on a
> Dell XPS M1530 and after a random time I lose my connection. I have
> installed WICD instead of Network manager and loss of connection are
> less frequent. I'll provide data if someone asks. If exists a solution
> please publish, thanks.
>
> --
> Intel PRO/Wireless 4965 AGN deactivates
> https://bugs.launchpad.net/bugs/216634
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “linux” package in Ubuntu: Incomplete
>
> Bug description:
> DISTRIB_ID=Ubuntu
> DISTRIB_RELEASE=7.10
> DISTRIB_CODENAME=gutsy
> DISTRIB_DESCRIPTION="Ubuntu 7.10"
> ------
>
> After some time the wireless device deactivates.
>
> -------
> LSPCI
> -------
> 0c:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN
> Network Connection (rev 61)
> Subsystem: Intel Corporation Unknown device 1120
> Flags: bus master, fast devsel, latency 0, IRQ 17
> Memory at f9ffe000 (64-bit, non-prefetchable) [size=8K]
> Capabilities: <access denied>
>
> -------
> DMESG
> -------
>
> [16422.772328] wlan0: RX deauthentication from 00:11:50:72:f7:42 (reason=1)
> [16422.772334] wlan0: deauthenticated
> [16423.771871] wlan0: authenticate with AP 00:11:50:72:f7:42
> [16423.972088] wlan0: authenticate with AP 00:11:50:72:f7:42
> [16424.171144] wlan0: authenticate with AP 00:11:50:72:f7:42
> [16424.371696] wlan0: authentication with AP 00:11:50:72:f7:42 timed out
> [16451.533147] rtc: lost 1 interrupts
> [16878.885803] rtc: lost 1 interrupts
> [17478.296325] rtc: lost 1 interrupts
> [18077.706832] rtc: lost 1 interrupts
> [18677.118351] rtc: lost 1 interrupts
> [19276.527890] rtc: lost 1 interrupts
> [19875.938379] rtc: lost 1 interrupts
> [20475.349797] rtc: lost 1 interrupts
> [21074.760395] rtc: lost 2 interrupts
> [21674.169913] rtc: lost 1 interrupts
> [21865.396848] rtc: lost 1 interrupts
> [21904.919514] rtc: lost 2 interrupts
> [22007.753826] rtc: lost 1 interrupts
> [22273.580454] rtc: lost 1 interrupts
> [22872.990959] rtc: lost 1 interrupts
> [23472.402466] rtc: lost 1 interrupts
> [24071.812141] rtc: lost 1 interrupts
> [24671.222499] rtc: lost 1 interrupts
> [25270.633908] rtc: lost 1 interrupts
> [25870.043511] rtc: lost 2 interrupts
> [26469.455030] rtc: lost 2 interrupts
> [27068.865545] rtc: lost 1 interrupts
> [27205.411854] rtc: lost 1 interrupts
> [27668.275500] rtc: lost 1 interrupts
> [28267.686101] rtc: lost 1 interrupts
> [28517.917321] rtc: lost 1 interrupts
> [28867.096237] rtc: lost 1 interrupts
> [29466.509716] rtc: lost 3 interrupts
> [29602.605648] rtc: lost 1 interrupts
> [29632.638152] rtc: lost 8 interrupts
> [29928.090433] rtc: lost 1 interrupts
> [30039.953967] rtc: lost 1 interrupts
> [30065.917122] rtc: lost 1 interrupts
> [30201.909885] rtc: lost 1 interrupts
> [30231.903818] rtc: lost 7 interrup...

Read more...

Revision history for this message
u20 (jacquescortelyou) wrote :
Download full text (3.3 KiB)

I know that this may seem crazy but today we had an internet issue and the
cable guy had to come... He asked me what channel I had the wifi running
on and i said 11, he said to switch it to channel 9 which I did. Ever
since, no more issues....

-j

On Mon, Aug 10, 2009 at 6:02 AM, AioroS <email address hidden> wrote:

> Hi, I have the same problem. My wifi card is PRO/Wireless 4965 AGN on a
> Dell XPS M1530 and after a random time I lose my connection. I have
> installed WICD instead of Network manager and loss of connection are
> less frequent. I'll provide data if someone asks. If exists a solution
> please publish, thanks.
>
> --
> Intel PRO/Wireless 4965 AGN deactivates
> https://bugs.launchpad.net/bugs/216634
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “linux” package in Ubuntu: Incomplete
>
> Bug description:
> DISTRIB_ID=Ubuntu
> DISTRIB_RELEASE=7.10
> DISTRIB_CODENAME=gutsy
> DISTRIB_DESCRIPTION="Ubuntu 7.10"
> ------
>
> After some time the wireless device deactivates.
>
> -------
> LSPCI
> -------
> 0c:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN
> Network Connection (rev 61)
> Subsystem: Intel Corporation Unknown device 1120
> Flags: bus master, fast devsel, latency 0, IRQ 17
> Memory at f9ffe000 (64-bit, non-prefetchable) [size=8K]
> Capabilities: <access denied>
>
> -------
> DMESG
> -------
>
> [16422.772328] wlan0: RX deauthentication from 00:11:50:72:f7:42 (reason=1)
> [16422.772334] wlan0: deauthenticated
> [16423.771871] wlan0: authenticate with AP 00:11:50:72:f7:42
> [16423.972088] wlan0: authenticate with AP 00:11:50:72:f7:42
> [16424.171144] wlan0: authenticate with AP 00:11:50:72:f7:42
> [16424.371696] wlan0: authentication with AP 00:11:50:72:f7:42 timed out
> [16451.533147] rtc: lost 1 interrupts
> [16878.885803] rtc: lost 1 interrupts
> [17478.296325] rtc: lost 1 interrupts
> [18077.706832] rtc: lost 1 interrupts
> [18677.118351] rtc: lost 1 interrupts
> [19276.527890] rtc: lost 1 interrupts
> [19875.938379] rtc: lost 1 interrupts
> [20475.349797] rtc: lost 1 interrupts
> [21074.760395] rtc: lost 2 interrupts
> [21674.169913] rtc: lost 1 interrupts
> [21865.396848] rtc: lost 1 interrupts
> [21904.919514] rtc: lost 2 interrupts
> [22007.753826] rtc: lost 1 interrupts
> [22273.580454] rtc: lost 1 interrupts
> [22872.990959] rtc: lost 1 interrupts
> [23472.402466] rtc: lost 1 interrupts
> [24071.812141] rtc: lost 1 interrupts
> [24671.222499] rtc: lost 1 interrupts
> [25270.633908] rtc: lost 1 interrupts
> [25870.043511] rtc: lost 2 interrupts
> [26469.455030] rtc: lost 2 interrupts
> [27068.865545] rtc: lost 1 interrupts
> [27205.411854] rtc: lost 1 interrupts
> [27668.275500] rtc: lost 1 interrupts
> [28267.686101] rtc: lost 1 interrupts
> [28517.917321] rtc: lost 1 interrupts
> [28867.096237] rtc: lost 1 interrupts
> [29466.509716] rtc: lost 3 interrupts
> [29602.605648] rtc: lost 1 interrupts
> [29632.638152] rtc: lost 8 interrupts
> [29928.090433] rtc: lost 1 interrupts
> [30039.953967] rtc: lost 1 interrupts
> [30065.917122] rtc: lost 1 interrupts
> [30201.909885] rtc: lost 1 interrupts
> [30231.903818]...

Read more...

Revision history for this message
David Koh (dkoh44) wrote : apport-collect data

Architecture: i386
DistroRelease: Ubuntu 9.04
HibernationDevice: RESUME=UUID=58e93447-abd4-42d8-abbb-7837891e8010
MachineType: - N/A
Package: linux-image-2.6.28-11-generic 2.6.28-11.42
PackageArchitecture: i386
ProcCmdLine: root=UUID=f3778bd1-c03c-41c3-a698-c4fe27a6d2d1 ro quiet splash
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.28-15.49-generic
Uname: Linux 2.6.28-15-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

Revision history for this message
Leann Ogasawara (leannogasawara) wrote :

Hi Guys,

Can you confirm this issue exists with the most recent Karmic Koala 9.10 Alpha release which contains a newer 2.6.31 based kernek? ISO CD images are available at http://cdimage.ubuntu.com/releases/karmic/ . Please let us know your results. Thanks.

Changed in linux (Ubuntu):
status: Incomplete → New
status: New → Incomplete
Revision history for this message
zpon (zpon-dk) wrote :

I have just upgraded to 9.10 to test the drivers, I will return with a result later.

Revision history for this message
Ted Laurent (tedlaur) wrote :

Architecture: amd64
DistroRelease: Ubuntu 9.04
HibernationDevice: RESUME=UUID=cf1630ca-6d36-4a0f-95c9-7a7b15db17db
MachineType: Dell Inc. XPS M1530
NonfreeKernelModules: nvidia
Package: linux-image-2.6.28-11-generic 2.6.28-11.42
PackageArchitecture: amd64
ProcCmdLine: root=UUID=74672a18-c797-48d3-818c-1c7640e578f9 ro quiet splash
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_CA.UTF-8
ProcVersionSignature: Ubuntu 2.6.28-15.52-generic
Uname: Linux 2.6.28-15-generic x86_64
UserGroups:

Revision history for this message
Dalle1985 (mortendalgaard) wrote :

I am seeing this bug and has been fighting it ever since upgrading to Jaunty. I am now running latest Karmic alpha release with newest updates and the problem persists.

It seems that the problem is most pronounced during high load on the network (i.e. during downloading or flash video streaming), however, I suspect that this is simply because it is more noticeable during high load! As far as I can tell, the connection cuts out with exactly 30 minute intervals. About 30 seconds after, this message shows up in the syslog:

Oct 15 00:09:01 localhost CRON[3987]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -type f -cmin +$(/usr/lib/php5/maxlifetime) -print0 | xargs -n 200 -r -0 rm)

Besides that, my syslog is being spammed with:

Oct 15 00:16:07 localhost kernel: [ 5487.712146] Inbound IN=wlan0 OUT= MAC= SRC=192.168.1.4 DST=192.168.1.255 LEN=242 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=138 DPT=138 LEN=222

with random intervals, and:

Oct 15 00:15:22 localhost wpa_supplicant[1314]: CTRL-EVENT-SCAN-RESULTS

with exactly 120 seconds interval. I don't really think the later two have anything to do with the bug, but I'm pretty much a novice, so I included them, just for good measure.

Most of the time, the connection is reestablished by itself, but sometimes I have to force it by removing the iwlagn module and reloading it.

I have tried several different things:

- Tried alternatives to Network Manager, none of them helped
- Tried switching my router to WEP encryption, nothing changed
- Tried ndiswrapper, didn't work at all
- Tried installing Jaunty (and later Karmic) backports which made Ubuntu crash during boot
- Switched to a brand new router, same problem

Only remedy is to use a wired connection.

When running Vista, the connection works without a glitch, another computer in my network running Hardy has been running rock steady for over a year now with nothing resembling this. This computer worked fine up until shortly after installing Jaunty (upgraded directly from Hardy to Jaunty).

The system is a Acer Aspire 5920G, 2,0 GHz T7300 with the Intel 4965AGN adapter.

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Dalle1985 (mortendalgaard) wrote :

Sorry for spamming, but just wanted to confirm: The connection disappears with exactly 30 minutes intervals! Followed about 40 seconds later by the afforementioned message. Might be a coincidence, but seems a little strange!

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Dalle1985 (mortendalgaard) wrote :

Okay... Yet another comment!

Yesterday, I was suggested to try and change the wireless channel on my router by user "u20" and strangely, this seemed to have an effect - for a while! But it didn't resolve the issue! It simply reset the connection upon reconnecting with my router! Exactly 30 minutes after establishing connection, I experienced another disconnection (Network Manager didn't register it, but the up and down rates both went to 0 and everything stopped) and has been doing so with fixed 30 minute intervals ever since.

Could someone else please check if they are also experiencing the drop outs with fixed delays, or if it is just me? Knowing if the loss of connection happens at a fixed interval would greatly narrow down the possible causes for this bug!

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