Kashif, The information after the "Panic" is pretty important for determining what the problem is. If this has happened recently, take a look in the output of the dmesg command or in the /var/adm/messages* files and see what the whole panic string is. Alternatively, go to /opt/crash/{letterbug} and do "strings * | grep panic" and see what the panic strings have been. There were some CPU issues with Ultrasparc-II CPUs - you may be seeing cache or writeback data parity issues - these are CPU related. Other panic strings may point to memory problems. 64mb of ram seems small for an AW51D - can you email a copy of the output of vmstat 10 10 in your reply? Your problem with the display freezing is likely a different issue. Many users have had an issue with the alarm manager causing the screen to stop taking mouse/kbd input. If the mouse moves but can't click anything, try to log in remotely and kill the alarm manager task. If the screen un-freezes then you know that's the issue. The alarm manager will restart the next time the alarm button is selected. There have been a number of Foxboro Helpful Hints and QFs that reduce the incidence of this problem but I don't know if it is completely resolved. What I/A version are you at? I've seen frequent other problems with the 51D series workstations - they seem to be significantly less sturdy than the other boxes in the 51A-51E range. I've had significantly more power supply, cpu and card failures in these boxes. If the boxes are being used on a desktop, ensure that they are not supporting a heavy monitor. Enough weight on the top of the case when used horizontally can cause the box to panic or shut down. Regards, Kevin FitzGerrell _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave