Hello, after starting X my fedora-desktop is going on and off and in the system-log are the following statements. Apr 27 14:55:21 localhost gdm[4670]: gdm_cleanup_children: child 5281 crashed of signal 11 Apr 27 14:55:21 localhost gdm[4670]: gdm_cleanup_children: Slave crashed, killing its children Apr 27 14:55:28 localhost gdm[4670]: gdm_cleanup_children: child 5297 crashed of signal 11 Apr 27 14:55:28 localhost gdm[4670]: gdm_cleanup_children: Slave crashed, killing its children Apr 27 14:55:35 localhost gdm[4670]: gdm_cleanup_children: child 5301 crashed of signal 11 Apr 27 14:55:35 localhost gdm[4670]: gdm_cleanup_children: Slave crashed, killing its children Apr 27 14:55:41 localhost gdm[4670]: gdm_cleanup_children: child 5305 crashed of signal 11 Apr 27 14:55:41 localhost gdm[4670]: gdm_cleanup_children: Slave crashed, killing its children Apr 27 14:55:48 localhost gdm[4670]: gdm_cleanup_children: child 5309 crashed of signal 11 Apr 27 14:55:48 localhost gdm[4670]: gdm_cleanup_children: Slave crashed, killing its children Apr 27 14:55:58 localhost gdm[4670]: gdm_cleanup_children: child 5313 crashed of signal 11 Apr 27 14:55:58 localhost gdm[4670]: gdm_cleanup_children: Slave crashed, killing its children Apr 27 14:56:11 localhost gdm[4670]: gdm_cleanup_children: child 5317 crashed of signal 11 Apr 27 14:56:11 localhost gdm[4670]: gdm_cleanup_children: Slave crashed, killing its children I hope anyone has an idea and could help me to solve the problem. Many thanks in advance! Andreas