Failures in iwlwifi after upgrade to 3.13.0-44

[Jethro Beekman]

After upgrading to Linux 3.13.0-44, I've been experiencing failures in iwlwifi. What I'm seeing is that WLAN just stops working at the time those messages in the syslog appear. I am then unable to get wireless again by standard means: rfkill on/off doesn't help, rmmod hangs or fails with module busy. The system won't perform a clean shutdown either, I have to hold to power button at the end of the shutdown sequence to actually power off. I'm now back on 3.13.0-43 without issues.

Additionally:
bash: ubuntu-bug: command not found

I have attached excerpts from my syslog and some version/hardware information. Happy to provide more information/log files.

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1411843

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Jethro Beekman (jethrogb)]

bash: apport-collect: command not found

[Jethro Beekman (jethrogb)]

I realize my wording is ambiguous. What I'm seeing is that WLAN just stops working at the time those messages in the syslog appear. I am then unable to get wireless again by standard means: rfkill on/off doesn't help, rmmod hangs or fails with module busy. The system won't perform a clean shutdown either, I have to hold to power button at the end of the shutdown sequence to actually power off.

Happy to provide more information/log files.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream stable kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.13 stable kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13.11-ckt13-trusty/

[Jethro Beekman (jethrogb)]

I'm having trouble reproducing. It might only happen in certain WiFi conditions. I'm currently running 3.13.0-44 and have v3.13.11-ckt13-trusty installed, and will switch and test when I'm getting failures again.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]