The second time was when I was using the Adobe Reader to open a pdf file - everything froze again, but this time, the mouse still moved, and I could still hear sound.
I don't know what's going on here. I looked in /var/log/messages around the times in question, and I see a bunch of stuff like this:
That's just a sample, there are about 20 of those in a row. It seems like just a record of an internet transaction.Jun 27 14:40:23 holcombe2 kernel: Inbound IN=eth0 OUT= MAC=00:07:e9:e3:99:48:00:12:43:ba:b4:42:08:00 SRC=220.127.116.11 DST=18.104.22.168 LEN=1400 TOS=0x00 PREC=0x00 TTL=107 ID=14592 DF PROTO=TCP SPT=5190 DPT=45133 WINDOW=16384 RES=0x00 ACK URGP=0
Can you tell me what files might provide more info?