Feisty Herd 3, BUG: soft lockup on CPU#0

Bug #83595 reported by Guido on 2007-02-06
Affects Status Importance Assigned to Milestone
linux-source-2.6.20 (Ubuntu)
Ben Collins

Bug Description

After instalation feisty-desktop-i386 Herd 3 system always freeze during the first boot with this message:
[ 22.648000] BUG: soft lockup detected on CPU#0!

Guido (vit-kotacka) wrote :
Guido (vit-kotacka) wrote :
Guido (vit-kotacka) wrote :

Disabling a wireless devices in the BIOS solved the problem. System boots on a graphic sign-on.

After re-enabling wifi in BIOS system still works. The error doesn't appear anymore.

Guido (vit-kotacka) wrote :

The error returned after yesterdays update. The system always freezes after checking a filesystem. I must disable a wireless card in order to sign into the system as a normal user.

Ben Collins (ben-collins) wrote :

Upgraded to v1.2.0 of ipw3945, which I believe fixes this problem. Should be available within the next week.

Changed in linux-source-2.6.20:
assignee: nobody → ben-collins
importance: Undecided → Medium
status: Unconfirmed → Fix Committed
Robert McMeekin (rrm3) wrote :

Confirming this affects a Toshiba A105-S2101. Disabling wireless at boot has no effect. This system does not use ipw3945.

Victor Noël (victornoel) wrote :


i own a lenovo 3000 n100 with a ipw3945 card and the bug is still here with linux-image-2.6.20-8.14-generic (with ipw3945 1.2.0mp says dmesg)

In fact the bug only appear when i boot with wifi kill switch on (so when i turn off wifi)

Robert McMeekin, can you raise a separate bug. In this bug report please give the output from lspci -v, lsmod and dmesg. Any other information you have regarding your wireless card would also be useful.

Robert McMeekin (rrm3) wrote :

Phillip, my problem has been fixed in Herd 4.

Guido (vit-kotacka) wrote :

Problem is fixed on Dell D820 with 2.6.20-8-generic kernel now. I have WiFi enabled in the BIOS and "Radio Frequency Kill Switch is On".

Joseph Maillardet (jokx) wrote :

The problem is always here for me with Feisty final release up-to-date on a desktop computer without any wireless devices :-(

I fill a bug here : https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/113050

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