Hi, 'crash' tool cannot read dmesg/log for dumps from Linux HEAD version: crash> log log: WARNING: log buf data structure(s) have changed The reason is one of the Linux changes in HEAD. This change is in -rc so not many people see this issue. But it will be released in 3.11. Here is the change http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=62e32ac3505a0cab1c5ef8ea2c0eab3b26ed855f I believe crash tool should check 'printk_log' structure and if it is absent then check for 'log'. -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility