Bug 199052
| Summary: | SMP motherboard not identified at boot | ||||||||||
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| Product: | [Fedora] Fedora | Reporter: | Gordon Hay <gordon> | ||||||||
| Component: | kernel | Assignee: | Dave Jones <davej> | ||||||||
| Status: | CLOSED CANTFIX | QA Contact: | Brian Brock <bbrock> | ||||||||
| Severity: | medium | Docs Contact: | |||||||||
| Priority: | medium | ||||||||||
| Version: | 5 | CC: | pfrields, wtogami | ||||||||
| 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: | 2006-10-21 01:56:27 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: | |||||||||||
| Attachments: |
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Description
Gordon Hay
2006-07-16 16:36:44 UTC
Created attachment 132524 [details]
output of dmesg
Problem still apparent with kernel 2.6.17-1.2174_FC5smp BTW, BIOS identifies 2 CPUs as normal.... Problem still apparent with kernel 2.6.17-1.2174_FC5smp BTW, BIOS identifies 2 CPUs as normal. A new kernel update has been released (Version: 2.6.18-1.2200.fc5) based upon a new upstream kernel release. Please retest against this new kernel, as a large number of patches go into each upstream release, possibly including changes that may address this problem. This bug has been placed in NEEDINFO state. Due to the large volume of inactive bugs in bugzilla, if this bug is still in this state in two weeks time, it will be closed. Should this bug still be relevant after this period, the reporter can reopen the bug at any time. Any other users on the Cc: list of this bug can request that the bug be reopened by adding a comment to the bug. In the last few updates, some users upgrading from FC4->FC5 have reported that installing a kernel update has left their systems unbootable. If you have been affected by this problem please check you only have one version of device-mapper & lvm2 installed. See bug 207474 for further details. If this bug is a problem preventing you from installing the release this version is filed against, please see bug 169613. If this bug has been fixed, but you are now experiencing a different problem, please file a separate bug for the new problem. Thank you. As requested, I have retested with the new kernel 2.6.18-1.2200.fc5 Sadly, though, there's no apparent difference in the symptoms. I think the key is this.. Local APIC disabled by BIOS -- you can enable it with "lapic" If there's an option in your BIOS to enable it, please do so. Otherwise, try that boot parameter. Added "lapic" to kernel parameters, making: memmap=exactmap mem=640k@0 mem=287m@1m lapic No apparent change in the sysptoms... can you attach the dmesg again with that option active ? Created attachment 138837 [details]
new dmesg log
New dmesg listing as requested.
can you install x86info, and run (as root) x86info -mp ? Created attachment 138878 [details]
Output of x86info -mp
Herewith x86info output as requested...
The first thing that jumps out at me is that the CPUs aren't paired. They're completely different steppings. Only certain steppings can be paired, usually they have to be identical. Did you add the 2nd CPU at a later date from when you first got the server? The next thing is even more bizarre. I find no evidence in Intels documentation that a Model 2 stepping 1 Pentium Pro ever existed. So either you've got something incredibly rare, or the BIOS is on drugs putting random nonsense into its MP table. See page 15 of the pdf at http://www.intel.com/design/archives/processors/pro/docs/242689.htm and you'll see that all PPro's were model 1. The more I look at this, the more I think this is a hardware problem of some sort, and not a linux bug. -1- The two CPUs have always been there since I've had the box, but that's only 6 months or so. Before that I've no idea. -2- As you say, weird.... Not worth spending more time on, I guess. But niggling away at the back of my mind is the recollection that it did work OK on FC4. I suppose it's conceivable that the BIOS/hardware broke between FC4 working and FC5 failing. Maybe one day I'll try reinstalling FC4 to see... Thanks anyway. It might be worth opening up the case, taking the CPUs out and seeing what steppings they are. That one oddball CPU is intriguing. PPro's all have an identifying number on them something like SY943 which can be used on intel's site to figure out exactly what they are. I really don't think there's any hope for this to work in Linux, so I'm going to close this as cantfix. |