Bug 1047380

Summary:	Kernel soft lockup - CPU#2 stuck [Xorg]
Product:	[Fedora] Fedora	Reporter:	Ivan Virgili <ivnmad>
Component:	xorg-x11	Assignee:	X/OpenGL Maintenance List <xgl-maint>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	20
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-01-17 22:24:20 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Ivan Virgili 2013-12-30 20:07:32 UTC

With Kernel 3.12.5-302 and v3.12.6-300 system doesn't boot up and gets stuck with fthe following error (repeated numerous time):

kernel: BUG: soft lockup - CPU#2 stuck for 22s! [Xorg:588] with 

Everything works fine with Kernel 3.11.10-301.fc20.x86_64

Comment 1 Ivan Virgili 2014-01-05 10:59:20 UTC

Problem generted by rc.local file invoking the following command:

echo OFF > /sys/kernel/debug/vgaswitcheroo/switch

This was implemented to stop the laptop from overheating.
Removing the rc.local file containing the command removes the soft lockup problem and the system boots normally. Unfortunately that recrated the overheating problem.

Comment 2 Ivan Virgili 2014-01-17 22:23:41 UTC

Installed Kernel 3.12.8-300.fc20.x86_64 from Koji and my issue has gone..