iwlagn driver crashes, preventing shutdown from completing

[Roshan George]

Nearly every time I shutdown, the iwlagn driver crashes and shutdown is interrupted. At this point, the only way I can shutdown is by holding down the power button. I can hear a clear 'click' as the computer then powers down. The driver never crashes at any other time even if I'm using wireless for hours at an end. It only occurs when I shutdown.

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
HibernationDevice: RESUME=UUID=b6ddfecc-0a48-408c-9936-9dfdba55dc03
MachineType: Dell Inc. XPS M1330
NonfreeKernelModules: nvidia
Package: linux-image-2.6.28-11-generic 2.6.28-11.42
ProcCmdLine: root=UUID=3caa1a80-a176-44d9-97e4-684eda8ab277 ro quiet
ProcEnviron:
 LANG=en_IN
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.28-11.42-generic
SourcePackage: linux

[VirtualEntity (lafeyette-management)]

I'll second this bug--same problem on an HP HDX 9000 series "Dragon" (the HP 20.1" laptop) with Ubuntu 9.04 Final and latest patches as of June 14, 2009. Same issue--screen dumps look much the same as Roshan's, esp. 7th or 8th photo. Nothing in the logs. Found some errors about "hpet" having to reset the counter/timeout to some huge number like 56000, so I changed that by adding the "clocksource=jiffies" to the command-line, not that I think this has anything to do with IWLAGN (which is notorious for causing all sorts of problems on another laptop). Sometimes, I see warnings that the wireless driver (IWLAGN) is in "deep sleep!", but no idea what to do about it. These warnings may or may not be followed by the usual hang.

This problem started happening shortly after applying updates. I do *not* recall seeing this on the fresh install of Ubuntu 9.04. I may rebuild and *NOT* apply updates and see if this makes the issue go away....

[Leann Ogasawara (leannogasawara)]

Hi Roshan,

Can you try installing linux-backports-modules-jaunty to see if it helps? It has an updated compat-wireless stack which may help. If this issue remains, do you see anything like a kernel oops or panic when the driver crashes during shutdown? Even if you have to take a digital photo of your screen of the oops/panic to attach to this bug that would be most helpful. Thanks.

[Leann Ogasawara (leannogasawara)]

Also, I assume if you unload the module prior to shutdown the system does not crash?

[Roshan George (roshan-george)]

Hi, Leann,

I have attached a photograph of the screen that displays when it crashes. Unfortunately, the top part of that text is snipped because it scrolls by too fast. Is there some way of making the shutdown log to a text file? The laptop then just does nothing after saying "Will now halt". Occasionally hitting Ctrl-Alt-Del at this point will say something like "Stopping all md devices..." and then restart, but it's impossible to tell when this will work and when it won't. When it doesn't, there is no response whatsoever.

[Leann Ogasawara (leannogasawara)]

Thanks for the photo. I assume that was without trying linux-backports-modules-jaunty? Please be sure to try installing that first.

If the oops continues to happen on shutdown, try checking /var/log/kernel.log.0 to see if the entire oops may have been logged there. If not, try setting the font size to something smaller. For example, from a terminal:

setfont /usr/share/consolefonts/Uni1-VGA8.psf.gz

Thanks.

[VirtualEntity (lafeyette-management)]

These are exactly the same symptoms I am experiencing.

I am working on a work-around (other than disabling all Compiz features, which seems to dramatically reduce the incidence of this annoyance).

The work-around is *NOT* a fix. Just a work-around, a kludge, a stupid script that basically kills iwlagn and NetworkManager, then either shuts down the system or reboots it. Hardly elegant, but, hey, at least it's better than having the system simply hang on shutdown barfing all kinds of scary stuff on the screen....

A./
----- Original Message -----
From: "Roshan George" <email address hidden>
To: "lafeyette management" <email address hidden>
Sent: Tuesday, June 16, 2009 5:44:10 AM GMT -05:00 US/Canada Eastern
Subject: [Bug 375924] Re: iwlagn driver crashes, preventing shutdown from completing

Hi, Leann,

I have attached a photograph of the screen that displays when it
crashes. Unfortunately, the top part of that text is snipped because it
scrolls by too fast. Is there some way of making the shutdown log to a
text file? The laptop then just does nothing after saying "Will now
halt". Occasionally hitting Ctrl-Alt-Del at this point will say
something like "Stopping all md devices..." and then restart, but it's
impossible to tell when this will work and when it won't. When it
doesn't, there is no response whatsoever.

** Attachment added: "Image0034.rotated.jpg"
http://launchpadlibrarian.net/27984054/Image0034.rotated.jpg

--
iwlagn driver crashes, preventing shutdown from completing
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[VirtualEntity (lafeyette-management)]

What would you have us install from linux-backports-modules-jaunty? I added this repository, then ran apt-get clean all, apt-get update, apt-get dist-upgrade.

Got nothing. No new packages, backports or otherwise.

Sadness....I guess I'm back to writing my stupid hack to deal with this.

For what it is worth, I'm not sure, yet, but I suspect that it's a conflict of some sort between Compiz and iwlagn... It doesn't seem to happen as often (if at all) if I disable the Compiz effects (but, unfortunately, turning off all the Compiz effects results in the CPU, rather than the GPU handling graphics, which means cruddy graphic performance).

A./

----- Original Message -----
From: "Leann Ogasawara" <email address hidden>
To: "lafeyette management" <email address hidden>
Sent: Tuesday, June 16, 2009 2:04:55 PM GMT -05:00 US/Canada Eastern
Subject: [Bug 375924] Re: iwlagn driver crashes, preventing shutdown from completing

Thanks for the photo. I assume that was without trying linux-backports-
modules-jaunty? Please be sure to try installing that first.

If the oops continues to happen on shutdown, try checking
/var/log/kernel.log.0 to see if the entire oops may have been logged
there. If not, try setting the font size to something smaller. For
example, from a terminal:

setfont /usr/share/consolefonts/Uni1-VGA8.psf.gz

Thanks.

--
iwlagn driver crashes, preventing shutdown from completing
https://bugs.launchpad.net/bugs/375924
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[Leann Ogasawara (leannogasawara)]

As mentioned previously, linux-backports-modules-jaunty "has an updated compat-wireless stack which may help". You'll probably want to install it by doing (note you'll need to reboot after installing):

sudo apt-get install linux-backports-modules-jaunty

[VirtualEntity (lafeyette-management)]

Oh! My fault.... I'd simply thought I was supposed to add the repository called "backports".

I'll try your command.

In the meanwhile, this script seems to work reasonably well to "get around" the issue, though
it certainly doesn't resolve it.

#!/bin/bash
sudo /etc/init.d/NetworkManager stop
sudo rmmod iwlagn
if [ -z $1 ]; then
{
STOPCODE=0
}
else
{
STOPCODE=$1
}
fi
sudo init $STOPCODE

A./

Will post again with results of linux-backports-modules-jaunty after a day or two....if I don't hear from you first. ;-)

A./

----- Original Message -----
From: "Leann Ogasawara" <email address hidden>
To: "lafeyette management" <email address hidden>
Sent: Tuesday, June 16, 2009 8:25:43 PM GMT -05:00 US/Canada Eastern
Subject: [Bug 375924] Re: iwlagn driver crashes, preventing shutdown from completing

As mentioned previously, linux-backports-modules-jaunty "has an updated
compat-wireless stack which may help". You'll probably want to install
it by doing (note you'll need to reboot after installing):

sudo apt-get install linux-backports-modules-jaunty

--
iwlagn driver crashes, preventing shutdown from completing
https://bugs.launchpad.net/bugs/375924
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[Roshan George (roshan-george)]

I installed the linux-backports-module-jaunty package yesterday and haven't had the problem since. I will report back to this thread if it recurs.

Thanks for the solution.

[VirtualEntity (lafeyette-management)]

So far, I have also not had any further problems since installing linux-backports-module-jaunty. I will also post if the problem recurs.

Thank you for your help with this!

----- Original Message -----
From: "Roshan George" <email address hidden>
To: "lafeyette management" <email address hidden>
Sent: Thursday, June 18, 2009 7:16:11 AM GMT -05:00 US/Canada Eastern
Subject: [Bug 375924] Re: iwlagn driver crashes, preventing shutdown from completing

I installed the linux-backports-module-jaunty package yesterday and
haven't had the problem since. I will report back to this thread if it
recurs.

Thanks for the solution.

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iwlagn driver crashes, preventing shutdown from completing
https://bugs.launchpad.net/bugs/375924
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[Leann Ogasawara (leannogasawara)]

Thanks for the udpates, sounds promising. I'll check back in a week or so. I'll assume no news is good news.

[Leann Ogasawara (leannogasawara)]

Seems linux-backports-modules fixed this issue. Closing this bug. Thanks.

[VirtualEntity (lafeyette-management)]

Leann

I just wanted to write to thank you for that. I apologize for not having remembered to update--it did fix the problem. I may be converting my other laptop from OpenSUSE 11.1 to Ubuntu 9.04 since it experiences a similar issue with its IWLAGN driver.

Saw your presentation on YouTube.... Very impressive!

Thank you, again! It's people like you that are the reason that I'm a die-hard open-source fan....

Take care,

Aaron.

----- Original Message -----
From: "Leann Ogasawara" <email address hidden>
To: "lafeyette management" <email address hidden>
Sent: Thursday, June 25, 2009 12:48:49 PM GMT -05:00 US/Canada Eastern
Subject: [Bug 375924] Re: iwlagn driver crashes, preventing shutdown from completing

Seems linux-backports-modules fixed this issue. Closing this bug.
Thanks.

** Package changed: linux (Ubuntu) => linux-backports-modules-2.6.28
(Ubuntu)

** Changed in: linux-backports-modules-2.6.28 (Ubuntu)
Status: Incomplete => Fix Released

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iwlagn driver crashes, preventing shutdown from completing
https://bugs.launchpad.net/bugs/375924
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