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Re: unloading WiFi modules is usually triggering kernel crash

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On Tue, Jul 31, 2012 at 01:54:52PM +0100, Pedro Francisco wrote:
> I've noticed in the past few days a pattern: sometimes nm-applet
> starts showing empty bars for the signal strength.
> 
> Running the script:
> sudo ifconfig wlan0 down; sleep 1
> sudo rmmod hp_wmi; sudo rmmod iwl3945; sudo rmmod iwlegacy; sudo rmmod
> mac80211; sudo rmmod cfg80211
> sleep 2; sudo rmmod rfkill; sync
> sudo modprobe rfkill; sudo modprobe cfg80211; sudo modprobe mac80211;
> sudo modprobe iwlegacy
> sudo modprobe iwl3945; sudo modprobe hp_wmi; sleep 1; sudo ifconfig wlan0 up
> 
> usually triggers a kernel crash. This has happened twice so far. I
> tried it now for the third time but it didn't crash.
> 
> Logs (running with slub_debug ):
> https://dl.dropbox.com/u/1332655/WiFi-issues/notTainted-cfg80211_mlme_disassoc-WARNING.log
> https://dl.dropbox.com/u/1332655/WiFi-issues/alreadyTainted-debug_print_object-WARNING.log
> (debug_print_object-WARNING was caused by running the above script
> rmmoding things)
> https://dl.dropbox.com/u/1332655/WiFi-issues/iw_dev_scan.log
> https://dl.dropbox.com/u/1332655/WiFi-issues/gshell-wifiBars_empty.png
> 
> Any ideas on what is going on? Looking at other mails around here it
> seems not to be driver specific, at least the cfg80211_mlme_disassoc
> part.

Looks the same as this one, FWIW...

	https://bugzilla.redhat.com/show_bug.cgi?id=834158

John
-- 
John W. Linville		Someday the world will need a hero, and you
linville@xxxxxxxxxxxxx			might be all we have.  Be ready.
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