Bug 58369

Summary:	[noathlon] kernel-2.4.9 Athlon rpm Panics on reboot on Athlon
Product:	[Retired] Red Hat Linux	Reporter:	Need Real Name <olaf.schnapauff>
Component:	kernel	Assignee:	Arjan van de Ven <arjanv>
Status:	CLOSED DUPLICATE	QA Contact:	Brian Brock <bbrock>
Severity:	high	Docs Contact:
Priority:	high
Version:	7.2
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2002-01-15 13:02:32 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Need Real Name 2002-01-15 11:48:47 UTC

Description of Problem:
Upon upgrade from 2.4.7 to Kernel 2.4.9 on a MSI 6378 Board Athlon Celeron 900
System,
the kernel panics on reboot. 
Its a VIA Chipset.

Version-Release number of selected component (if applicable):
2-4-9

How Reproducible:
install on athlon system and boot.

Additional Information:

this also happens on self-compiled original linux kernels from 2.4.9 on to 2.4.17.
It is a known issue of too optimistic athlon optimizations. 

2.4.7 kernel output:
Jan 10 13:51:13 runes kernel:  *** Motherboard with possibly underspec'ed
Jan 10 13:51:13 runes kernel:  *** voltage regulator or broken VIA chipset bios
detected
Jan 10 13:51:13 runes kernel:  *** Athlon optimisations disabled.

The kernel 2.4.7 complained on boot about overoptimistic VIA Chipset settings or
underspec voltage regulator and disabled athlon optimizations.

Therefore I tried building / Installing i686 kernels instead of athlon kernels.

This works stable. The system now runs a i686 compiled 2.4.17 for a while
without incident.


Suggest: If detecting VIA chipset with these issues, do not install athlon
optimized kernels

Comment 1 Arjan van de Ven 2002-01-15 13:02:27 UTC

Even better idea: recently the cause was found and it turns out that some bioses
leave the chipset in debugging mode. Our next kernel will turn off that
debugging mode and all will be well. In the mean time, passing "noathlon" on the
kernel commandline will disable athlon code as well...

Comment 2 Arjan van de Ven 2002-01-18 18:40:10 UTC


*** This bug has been marked as a duplicate of 55040 ***