kernel panic on 2.6.27-14-generic when rmmod iwl3945

[Pierre Poissinger]

Latest 2.6.27-14 freeze on rmmod'ing iwl3945 - also running rt73usb wifi dongle
2.6.27-13 and previous didn't show this behavior

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 8.10
Package: linux-image-2.6.27-14-generic 2.6.27-14.30
ProcCmdLine: root=UUID=3d75e1e5-989a-4653-99e8-14cea78657e1 ro splash quiet vga=838
ProcEnviron:
 PATH=~/bin:/opt/cvs2svn-2.3.0-dev:/opt/git/bin:/opt/emacs23/bin:/home/username/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/usr/bin/zsh
ProcVersionSignature: Ubuntu 2.6.27-14.30-generic
SourcePackage: linux

[Pierre Poissinger (pierre-poissinger)]

magic keys don't seems to allows the reboot - so I made a picture of the console:
http://dl.getdropbox.com/u/64259/DSC_0402.JPG
(didn't attach since it's around 3mb to not clutter launchpad...)

Right now iwl3945 is blacklisted on my box (so it won't show up in dmesg) - will rerun logs if needed

[Psy[H[] (vovik-wfa)]

I also have problem after upgrade to kernel version 2.6.27-14 in Intrepid, but with rt73usb (tested with Asus WL-167g and D-Link DWA-110 adapters)
Sometimes system locks up: no new programs can be launched, no new logins can be done, gui tools, including shutdown, can't be used, ctrl+alt+del from console does not work. But some apps that already running still responding.
System can be restarted with SysRq combinations, but sometimes it goes on full lockup and does not respond on anything. There are no logs saved in this period. The only part of "messages" log I've managed to save is just before freeze. It is in the attachment.

Problem occurs either on first or second plug-in of Ralink adapter, or after it's disconnection. Attached log part was saved just after disconnection of adapter. Then first symptoms appeared, then adapter was connected again, after that - half-freeze and no further logs.

It seems that in Jaunty Alpha 6 this problem does not exist, but I remember similar lockups in Hardy: when rt73usb was in use, logins and use of sudo was not possible, but after unplugging adapter things were back to normal. Now problem with rt73usb is much more destructive.
Because of that recurrence and severe effect on system (blocking of sudo, logins, programs startup) I suggest this problem should me monitored in Jaunty in case of repetition.

[Pierre Poissinger (pierre-poissinger)]

I gave a shoot without plugging the usb dongle, but lead to same results.

[Merike Sell (merikes)]

Seeing the same issue with 2.6.28-11-generic in Jaunty upgraded from Intrepid. Forces me to restart every time wifi connection dies, since rmmod, modprobe not possible. It used to die occasionally in Intrepid too, but there rmmod worked.

[Andres Mujica (andres.mujica)]

marked as dupe from bug #345710