Thank you for your hint. > Boot the system with the IOMMU off and find out what PCI device is at > 05:01.0 using lspci. Assuming that it's not critical, try disabling or > removing that component. I can not see a 05:01.0 using lspci. There is however 05:0e.0, which is the RAID controller (Adaptec RAID 3405). It's kind of a critical component, so I can not disable it. ;) Does this mean, it's impossible to make IOMMU work on this machine? -- nilscaspar.ch On 30.01.2013, at 05:52, Gordon Messmer <yinyang at eburg.com> wrote: > On 01/29/2013 01:16 PM, Nils Caspar wrote: >> Everything works so far, but when I add intel_iommu=on to the kernel >> line of my grub.conf, Dracut gives my a kernel panic while booting. I >> added "rdshell" to the command line and extracted the boot messages >> via dmesg (http://nilscaspar.ch/centos-dmesg.log). > > Similar behavior has been diagnosed as a hardware bug: > https://bugzilla.redhat.com/show_bug.cgi?id=605888 > > Boot the system with the IOMMU off and find out what PCI device is at > 05:01.0 using lspci. Assuming that it's not critical, try disabling or > removing that component. > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos