[Bug 855365] New: After suspend/restart wpa_supplicant uses 100 percent of CPU

bugzilla_noreply＠novell.com

13 Dec 2013 13 Dec '13

13:11

https://bugzilla.novell.com/show_bug.cgi?id=855365 https://bugzilla.novell.com/show_bug.cgi?id=855365#c0 Summary: After suspend/restart wpa_supplicant uses 100 percent of CPU Classification: openSUSE Product: openSUSE 13.1 Version: Final Platform: x86-64 OS/Version: openSUSE 13.1 Status: NEW Severity: Normal Priority: P5 - None Component: Network AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: dan@spacemandan.net QAContact: qa-bugs@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.57 Safari/537.36 If I suspend to RAM, then power back up, wpa_supplicant immediately starts to use 100 percent of one CPU. wpa_supplicant does seem to be working in that state, because NetworkManager can still connect to a wireless network. It also seems to be using the CPU in nice mode, but it still uses far too much power and heats up the computer eventually. If I kill wpa_supplicant, it restarts immediately and still at runs at 100%. Sending SIGSTOP pauses it correctly, but then wireless networking doesn't work right. Restarting the network doesn't help, but after a complete reboot, the program runs properly again until the next suspend. card: Netgear WG111v3 USB driver module: rtl8187 Reproducible: Always Steps to Reproduce: 1. Connect to wireless network with NetworkManager 2. Suspend to RAM 3. Wake computer Actual Results: wpa_supplicant uses 100% of CPU. Expected Results: wpa_supplicant uses no processor power except when needed. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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bugzilla_noreply＠novell.com

16 Dec 16 Dec

02:20

New subject: [Bug 855365] After suspend/restart wpa_supplicant uses 100 percent of CPU

https://bugzilla.novell.com/show_bug.cgi?id=855365 https://bugzilla.novell.com/show_bug.cgi?id=855365#c zhang jiajun changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jzhang@suse.com AssignedTo|bnc-team-screening@forge.pr |vbotka@suse.com |ovo.novell.com | -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

30 Dec 30 Dec

14:02

New subject: [Bug 855365] After suspend/restart wpa_supplicant uses 100 percent of CPU

https://bugzilla.novell.com/show_bug.cgi?id=855365 https://bugzilla.novell.com/show_bug.cgi?id=855365#c1 --- Comment #1 from Dan Gerhards 2013-12-30 14:02:18 UTC --- I have found a workaround for this bug. After a resume, disable wireless with the network manager. Kill wpa_supplicant, and wait for it to restart on its own. (You need the root password for this.) Enable wireless in the network manager again. This works almost every time, and wpa_supplicant will work correctly until the next suspend/resume event. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

13 Jun 13 Jun

07:45

New subject: [Bug 855365] After suspend/restart wpa_supplicant uses 100 percent of CPU

https://bugzilla.novell.com/show_bug.cgi?id=855365 https://bugzilla.novell.com/show_bug.cgi?id=855365#c2 Libor Pecháček changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|vbotka@suse.com |glin@suse.com --- Comment #2 from Libor Pecháček 2014-06-13 09:45:04 CEST --- Reassigning to the new wpa_supplicant maintainer. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

17 Jun 17 Jun

07:28

New subject: [Bug 855365] After suspend/restart wpa_supplicant uses 100 percent of CPU

https://bugzilla.novell.com/show_bug.cgi?id=855365 https://bugzilla.novell.com/show_bug.cgi?id=855365#c3 Gary Ching-Pang Lin changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO InfoProvider| |dan@spacemandan.net --- Comment #3 from Gary Ching-Pang Lin 2014-06-17 07:28:20 UTC --- Hi Dan, Could you try the following steps and attach the log file? 1. Modify /usr/share/dbus-1/system-services/fi.w1.wpa_supplicant1.service to append "-t -dd" to the end "Exec=/usr/sbin/wpa_supplicant ..." 2. Kill wpa_supplicant 3. Suspend/resume the system 4. Attach /var/log/wpa_supplicant.log if wpa_supplicant occupies CPU. Please also notice if there are any strange message in dmesg after resume. Thanks. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

18 Jun 18 Jun

03:01

New subject: [Bug 855365] After suspend/restart wpa_supplicant uses 100 percent of CPU

https://bugzilla.novell.com/show_bug.cgi?id=855365 https://bugzilla.novell.com/show_bug.cgi?id=855365#c4 --- Comment #4 from Dan Gerhards 2014-06-18 03:01:13 UTC --- Created an attachment (id=594970) --> (http://bugzilla.novell.com/attachment.cgi?id=594970) wpa log file -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

03:03

New subject: [Bug 855365] After suspend/restart wpa_supplicant uses 100 percent of CPU

https://bugzilla.novell.com/show_bug.cgi?id=855365 https://bugzilla.novell.com/show_bug.cgi?id=855365#c5 --- Comment #5 from Dan Gerhards 2014-06-18 03:03:02 UTC --- Created an attachment (id=594971) --> (http://bugzilla.novell.com/attachment.cgi?id=594971) output of dmesg -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

03:11

New subject: [Bug 855365] After suspend/restart wpa_supplicant uses 100 percent of CPU

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2. Kill wpa_supplicant Killing it doesn't work. It restarts immediately. However, I have been sending

https://bugzilla.novell.com/show_bug.cgi?id=855365 https://bugzilla.novell.com/show_bug.cgi?id=855365#c6 --- Comment #6 from Dan Gerhards 2014-06-18 03:11:51 UTC --- the TERM signal. I did try to send KILL, and when it respawned, the supplicant took over the CPU just like when I do a suspend/resume! That gives me an easier way to reproduce the bug, and maybe it gives you some more information.

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4. Attach /var/log/wpa_supplicant.log if wpa_supplicant occupies CPU. The whole file was very large, so the file I attached just includes the part after the resume. (Yes, wpa_supplicant occupied the CPU.)

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Please also notice if there are any strange message in dmesg after resume. I attached the output because it might be strange.

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bugzilla_noreply＠novell.com

03:45

New subject: [Bug 855365] After suspend/restart wpa_supplicant uses 100 percent of CPU

https://bugzilla.novell.com/show_bug.cgi?id=855365 https://bugzilla.novell.com/show_bug.cgi?id=855365#c7 --- Comment #7 from Gary Ching-Pang Lin 2014-06-18 03:45:21 UTC --- (In reply to comment #6)

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2. Kill wpa_supplicant Killing it doesn't work. It restarts immediately. However, I have been sending the TERM signal. I did try to send KILL, and when it respawned, the supplicant took over the CPU just like when I do a suspend/resume! That gives me an easier way to reproduce the bug, and maybe it gives you some more information.

So you can reproduce the bug by sending KILL to wpa_supplicant? This might be a clue.

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4. Attach /var/log/wpa_supplicant.log if wpa_supplicant occupies CPU. The whole file was very large, so the file I attached just includes the part after the resume. (Yes, wpa_supplicant occupied the CPU.)

I found the following messages: Could not set interface wlan0 flags (UP): Input/output error wlan0: Failed to initialize driver interface - try next driver wrapper There is another wifi device wlan1 showed in the log, and this looks strange. Do you have two wifi cards in the machine? Please attach the output of "iw dev", "lspci", and "lsusb".

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Please also notice if there are any strange message in dmesg after resume. I attached the output because it might be strange. ieee80211 phy0: rt61pci_wait_bbp_ready: Error - BBP register access failed, aborting ieee80211 phy0: rt61pci_set_device_state: Error - Device failed to enter state 4 (-5)

I suspect this is a driver issue. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

04:22

New subject: [Bug 855365] After suspend/restart wpa_supplicant uses 100 percent of CPU

https://bugzilla.novell.com/show_bug.cgi?id=855365 https://bugzilla.novell.com/show_bug.cgi?id=855365#c8 --- Comment #8 from Dan Gerhards 2014-06-18 04:22:56 UTC ---

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Do you have two wifi cards in the machine? I did until 10 minutes ago. It's a desktop machine, and the internal NIC couldn't get a good signal from where it sits, so I put a USB NIC at the end of a 10-foot cable. That setup worked fine until I upgraded to 13.1.

Based on your comment, I tried taking the internal NIC out, and the bug disappeared! I wish someone had suggested that *seven months* ago. It never occurred to me that a driver could cause a problem like that, and I didn't know where to look for messages. Anyway, this is solved as far as I'm concerned. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

06:13

New subject: [Bug 855365] After suspend/restart wpa_supplicant uses 100 percent of CPU

https://bugzilla.novell.com/show_bug.cgi?id=855365 https://bugzilla.novell.com/show_bug.cgi?id=855365#c9 Gary Ching-Pang Lin changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |RESOLVED InfoProvider|dan@spacemandan.net | Resolution| |INVALID --- Comment #9 from Gary Ching-Pang Lin 2014-06-18 06:13:34 UTC --- Ok, then I close this bug due to the faulty hardware. Feel free to reopen the bug if you have any further finding. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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[Bug 855365] New: After suspend/restart wpa_supplicant uses 100 percent of CPU

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