From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7 Description of problem: If you try and install using the FC4 x86_64 ISO boot disc, it crashes as it is booting just after: md: ...autorun DONE. with the message: VFS: Cannot open root device "<NULL>" or unknown-block(3,2) Please append a correct "root=" boot option Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(3,2) Call Trace: <ffffffff8013a4a5>{panic+133} <ffffffff801cba74>{sys_mount+196} <ffffffff801f6ef9>{__bdevname+41} <ffffffff80582c00>{mount_block_root+496} <ffffffff80582d85>{prepare_namespace+213} <ffffffff801c186>{init+326} <ffffffff8010fc33>{chip_rip+8} <ffffffff8010c040>{init+0} <ffffffff8010fc2b>{chip_rip+0} <3>BUG: soft lockup detected on CPU#0! NOTES: I even tried removing one CPU to see if that helped. FC3 boot iso for x86_64 does not exhibit this behavior and I will have to reinstall my system again using FC3. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. insert boot iso turn on machine 2. watch it boot 3. watch it crash Actual Results: same as above Expected Results: boots and anaconda starts. Additional info:
The bug I'm duplicating this against has a pointer to an unofficial FC4.2, which is FC4 + updates. The newer kernel might be just enough to get you up and running. *** This bug has been marked as a duplicate of 169613 ***