Hello Rafael and Thomas, As of 2.6.27-rc1-git4 the bug still exists. The bug is caused by c1e tickless patch and is not observed if I pass either "noapictimer" or "nohpet" option to a kernel. The kernel configuration and dmesg output are attached. Mikhail On Sat, 2 Aug 2008 20:04:19 +0200 (CEST) "Rafael J. Wysocki" wrote: > This message has been generated automatically as a part of a report > of recent regressions. > > The following bug entry is on the current list of known regressions > from 2.6.26. Please verify if it still should be listed > and let me know (either way). > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11191 > Subject : 2.6.26-git8: spinlock lockup in c1e_idle() > Submitter : Mikhail Kshevetskiy > Date : 2008-07-24 03:22 (10 days old) > References : http://lkml.org/lkml/2008/7/23/317 > Handled-By : Thomas Gleixner > >