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What should I do when Ubuntu freezes?
I am facing a serious problem as my Dell Optiplex 745 loaded with Ubuntu 12.04 32bit freezes with a blank screen no mouse cursor no keyboard activity in many occasions.
Sometimes when I open firefox, or software center, I really can't tell what the main problem is, but what i am certain about is it i have to do a hard reset to reboot.
I tried to use a live-cd to boot but it did the same, tried the recovery console but couldn't find a way to fix from there (I am a new user) suspected a hardware problem but windows runs flawlessly so I believe its something related to ubuntu.
Specs:
Intel Celeron D 3.06 GHZ
3.0 GB ram
Intel built in graphics Q965
1 TB HDD
Bios Phoenex 2.6.4
Please help I really love ubuntu and I don't want to go back to windows!
dmesg, file/var/log/kern.log– ish Jun 27 '12 at 23:49