Red Hat Bugzilla – Full Text Bug Listing
|Summary:||DMAR (intel_iommu) broken on yet another machine|
|Product:||[Fedora] Fedora||Reporter:||Enrique V. Bonet Esteban <enrique.bonet>|
|Component:||kernel||Assignee:||Kernel Maintainer List <kernel-maint>|
|Status:||CLOSED CURRENTRELEASE||QA Contact:||Fedora Extras Quality Assurance <extras-qa>|
|Version:||8||CC:||hantsy, i.mortimer, jcm, red.ostrava, scott.ryan|
|Fixed In Version:||18.104.22.168-10.fc8||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2008-06-06 03:45:17 EDT||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description Enrique V. Bonet Esteban 2008-05-07 11:27:32 EDT
Description of problem: In two Intel S3200SH server motherboards, one with the 33 version of the BIOS and Xeon processor 3075, and another with the 39 version of the BIOS and Xeon processor 3085, the 2.6.24 fedora 8 kernels generated the following boot error: DMAR:DRHD (flags: 0x0000001c) base: 0x0000feb010000000 This error is written repeatedly on the screen and the system does not boot. When trying to boot with argument "acpi = off", the systems boots, but the kernel detects the Xeon 3075 or 3085 processor as single core. The systems boot correctly with 2.6.23 kernels. Version-Release number of selected component (if applicable): All 2.6.24 kernels. How reproducible: Update or install any 2.6.24 kernel in an Intel S3200SH server motherboard. Steps to Reproduce: 1. Install the 2.6.24 kernel in an Intel server S3200SH motherboard. 2. Boot the system, the boot failed. 3. Put the acpi = off argument in the boot options, the system boot, but cat /proc/cpuinfo report only one processor (processor 0). Actual results: cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Xeon(R) CPU 3075 @ 2.66GHz stepping : 11 cpu MHz : 2660.039 cache size : 4096 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm const ant_tsc up arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 5322.08 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: Additional info:
Comment 1 Dave Jones 2008-05-07 11:55:07 EDT
probably yet another case of buggy firmware. I think we're just going to have to turn this off for now. The code needs to become a lot more tolerant of crap BIOSes.
Comment 2 Chuck Ebbert 2008-05-07 13:10:01 EDT
It should boot with this option: intel_iommu=off
Comment 3 Dave Jones 2008-05-07 13:18:08 EDT
I sent a pointer to this bug to the upstream developers. hopefully they'll be able to make their code handle cases like this automatically, but I really think this code isn't ready for primetime just yet.
Comment 4 Chuck Ebbert 2008-05-23 03:48:15 EDT
DMAR has been disabled in the 2.6.25 kernels for Fedora 8.
Comment 5 Fedora Update System 2008-05-23 03:52:35 EDT
kernel-22.214.171.124-10.fc8 has been submitted as an update for Fedora 8
Comment 6 Chuck Ebbert 2008-05-23 03:57:07 EDT
*** Bug 444420 has been marked as a duplicate of this bug. ***
Comment 7 Fedora Update System 2008-05-28 22:41:32 EDT
kernel-126.96.36.199-10.fc8 has been pushed to the Fedora 8 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with su -c 'yum --enablerepo=updates-testing update kernel'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F8/FEDORA-2008-4484
Comment 8 Enrique V. Bonet Esteban 2008-05-30 07:05:03 EDT
The update fixes the bug. The kernel boots properly without the option intel_iommu = off
Comment 9 Fedora Update System 2008-06-06 03:45:11 EDT
kernel-188.8.131.52-10.fc8 has been pushed to the Fedora 8 stable repository. If problems still persist, please make note of it in this bug report.
Comment 10 Chuck Ebbert 2008-06-11 21:25:49 EDT
*** Bug 436899 has been marked as a duplicate of this bug. ***
Comment 11 Scott Ryan 2009-11-21 08:55:04 EST
I have this problem with Fedora 12 on Intel(R) Core(TM)2 Duo CPU P8400 @ 2.26GHz kernel panic - not syncing: DMAR hardware is malfunctioning
Comment 12 Ian Mortimer 2009-11-22 20:03:41 EST
Just a guess but I think you're more likely to get a response to this if you open a new bug report for Fedora 12. This bug was for Fedora 8 which is no longer supported.
Comment 13 George 2009-11-26 01:22:27 EST
"Just a guess but I think you're more likely to get a response to this if you open a new bug report for Fedora 12" bug #540082 opened for FC12 on this issue
Comment 14 Hantsy Bai 2009-12-31 06:02:43 EST
The "intel_iommu = off" resovle the kernelpanic, but it stop installation at startup installer here.. My notebook is hp compaq cq40 609tx.