If I start my IBM ThinkPad T42 laptop undocked and then dock it into a dock that has a PS/2 mouse and keyboard attached, it often kernel panics with messages like: kernel panic - not syncing:arch/i386/kernel/semaphore.c:64:spin_is_locked on uninitialized spinlock f0e359bc. (Not tainted) The problem doesn't happen when I don't have a mouse and keyboard plugged into the dock, nor does it seem to occur if I start up the machine docked and then undock and redock it. It happens on both the current (2.6.13-1.1532_FC4) and previous (2.6.13-1.1526_FC4) kernels.
This is a mass-update to all currently open kernel bugs. A new kernel update has been released (Version: 2.6.15-1.1830_FC4) based upon a new upstream kernel release. Please retest against this new kernel, as a large number of patches go into each upstream release, possibly including changes that may address this problem. This bug has been placed in NEEDINFO_REPORTER state. Due to the large volume of inactive bugs in bugzilla, if this bug is still in this state in two weeks time, it will be closed. Should this bug still be relevant after this period, the reporter can reopen the bug at any time. Any other users on the Cc: list of this bug can request that the bug be reopened by adding a comment to the bug. If this bug is a problem preventing you from installing the release this version is filed against, please see bug 169613. Thank you.
I haven't been able to reproduce with the latest kernel, so resolving this bug "worksforme." I'll reopen if I experience the problem again.