2011-10-04 18:04:20

by Jamie Kitson

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Subject: BUG: Soft lockup CPU#0 stuck for 22s! [wpa_supplicant:756]

Hi,

I get the following error when cold booting, it doesn't seem to happen
after a restart:

http://www.flickr.com/photos/jamiekitson/6211329161/

I have just moved my installation to a new machine with a:

03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE
802.11b/g/n WiFi Adapter (rev 01)
Subsystem: Realtek Semiconductor Co., Ltd. Device 8195
Kernel driver in use: rtl8192ce
Kernel modules: rtl8192ce

Linux jamie-laptop 3.0-ARCH #1 SMP PREEMPT Tue Aug 30 08:53:25 CEST
2011 x86_64 Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz GenuineIntel
GNU/Linux

I am reporting it here as I assume it's a rtl8192ce bug, but if not I
can report it to the wpa_supplicant guys.

Thanks, Jamie


2011-10-04 19:03:37

by Larry Finger

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Subject: Re: BUG: Soft lockup CPU#0 stuck for 22s! [wpa_supplicant:756]

On 10/04/2011 01:03 PM, Jamie Kitson wrote:
> Hi,
>
> I get the following error when cold booting, it doesn't seem to happen
> after a restart:
>
> http://www.flickr.com/photos/jamiekitson/6211329161/
>
> I have just moved my installation to a new machine with a:
>
> 03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE
> 802.11b/g/n WiFi Adapter (rev 01)
> Subsystem: Realtek Semiconductor Co., Ltd. Device 8195
> Kernel driver in use: rtl8192ce
> Kernel modules: rtl8192ce
>
> Linux jamie-laptop 3.0-ARCH #1 SMP PREEMPT Tue Aug 30 08:53:25 CEST
> 2011 x86_64 Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz GenuineIntel
> GNU/Linux
>
> I am reporting it here as I assume it's a rtl8192ce bug, but if not I
> can report it to the wpa_supplicant guys.

The bug is not necessarily caused by rtl8192ce. I have never seen this problem
on my system. I would also expect a stack dump. Anyone know what is needed to
get one here?

I do have some further questions.

Which variant of the RTL8188CE do you have? Use 'lspci -nn' to tell.

Does ARCH have an updated kernel later than 3.0?

What version of wpa-supplicant?

Are you using NetworkManager? If so, what version? Is your desktop KDE, Gnome,
or something else? If NM, what applet and version?

If not NM, how do you connect?

Larry

2011-10-04 20:59:47

by Jamie Kitson

[permalink] [raw]
Subject: Re: BUG: Soft lockup CPU#0 stuck for 22s! [wpa_supplicant:756]

> Which variant of the RTL8188CE do you have? Use 'lspci -nn' to tell.

03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd.
RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)

> Does ARCH have an updated kernel later than 3.0?

Looks like I am using the latest core of 3.0.4, there's 3.0.6 in testing:

http://www.archlinux.org/packages/testing/x86_64/linux/

Might that help?

> What version of wpa-supplicant?

wpa_supplicant v0.7.3

> Are you using NetworkManager? If so, what version? Is your desktop KDE,
> Gnome, or something else? If NM, what applet and version?
>
> If not NM, how do you connect?

I use dwm and wpa_supplicant, no manager.

Thanks, Jamie

2011-10-05 02:55:29

by Larry Finger

[permalink] [raw]
Subject: Re: BUG: Soft lockup CPU#0 stuck for 22s! [wpa_supplicant:756]

On 10/04/2011 03:59 PM, Jamie Kitson wrote:
>> Which variant of the RTL8188CE do you have? Use 'lspci -nn' to tell.
>
> 03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd.
> RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)
>
>> Does ARCH have an updated kernel later than 3.0?
>
> Looks like I am using the latest core of 3.0.4, there's 3.0.6 in testing:
>
> http://www.archlinux.org/packages/testing/x86_64/linux/
>
> Might that help?

Probably not. I think all the changes in the mainline 3.1-rc8 are in 3.0.4.
>
>> What version of wpa-supplicant?
>
> wpa_supplicant v0.7.3

That is what I use.

>> Are you using NetworkManager? If so, what version? Is your desktop KDE,
>> Gnome, or something else? If NM, what applet and version?
>>
>> If not NM, how do you connect?
>
> I use dwm and wpa_supplicant, no manager.

I know nothing of dwm, but the driver works on my system with both NM and with ifup.

Larry