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[Bug 476367] New: wireless driver iwlagn hangs after waking up from suspend -- only hard shutdown helps
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Tue, 17 Feb 2009 01:57:35 -0700 (MST)
  • Message-id: <bug-476367-21960@xxxxxxxxxxxxxxxxxxxxxxxxx/>

User vok@xxxxxxxxxxx added comment

Summary: wireless driver iwlagn hangs after waking up from
suspend -- only hard shutdown helps
Classification: openSUSE
Product: openSUSE 11.1
Version: Final
Platform: x86-64
OS/Version: openSUSE 11.1
Status: NEW
Severity: Major
Priority: P5 - None
Component: Kernel
AssignedTo: bnc-team-screening@xxxxxxxxxxxxxxxxxxxxxx
ReportedBy: vok@xxxxxxxxxxx
QAContact: qa@xxxxxxx
Found By: ---

Created an attachment (id=273198)
--> (
subset of /var/log/messages

User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:
Gecko/2009012700 SUSE/3.0.6-0.1.2 Firefox/3.0.6

I have often a problem with the wireless driver iwlagn after wakeup from
When i attempt to connect to a wireless network, it very often results
in the machine hanging: I can see that the root process event/1 consumes
100% computation time and keyboard input does not work anymore. All I
can do is turn off the machine using the powerbutton.
Sometimes, the HW-switch for the wireless manages to shut down the
wireless driver, which also stops the event/1 process from using 100%
computation time. Then, a rmmod and modprobe of iwlagn _sometimes_ helps.

This observation happened on a Thinkpad X200s, opensuse and kernel
and, 64bit.

This is the same error as in

And I can confirm comment #26.

Reproducible: Always

Steps to Reproduce:
How to do that:
- use wpa connection (not really sure if it would work on nonwpa also, i have
wpa everywhere i can)
- connect to AP
- associate or send some data
- turn killswitch on (disable wireless)
- turn killswitch off (enable wireless)
- close the lid/suspend to ram
- restore
- try to associate to wpa
- you get event/1 cycling, one core is fully loaded, keyboard is blocked in X
until i kill signal again.
- until i fix it somehow, i cannot connect to wpa station until reboot.

Actual Results:
Machine hangs, keyboard input does not work anymore under X.
Mouse seems to be working, but opening a shell, for example, is _very_ slow

Expected Results:
There should not have been a lockup of the iwlagn driver after wakeup.

I classify it as a "major feature being broken" as it makes the suspend2ram on
the laptop useless.

i appended an extract from /var/log/messages. It starts with the last line
before suspend to ram and ends with the the final hard shutdown after the
The iwlagn module starts at time 20:12:37 showing a number of microcode errors.

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