Following a kernel upgrade:
2013-09-07 06:28:45 install linux-image-3.2.0-53-generic <none> 3.2.0-53.81
I experienced intermittent freezes. Sadly I have no simple sequence to reproduce these. They occur when I am using the machine (a Celeron laptop with 768Mb of ram) heavily; 2 active desktops under LXDE, running firefox multiple tabs, with PDF plugin, and running Gramps (a python app), viewnior, multiple LXTerminals and Gimp.
(I am doing genealogy - essentially searching for records, viewing, enhancing or editing scans of paper records, and storing them)
"sometimes" during this heavy loading the mouse would freeze. I rapidly learnt that this was game over - I could not even use ctrl-alt-f1 to get a terminal.
I discovered that "REISUB" would restart the machine after a freeze. Nothing else worked (apart from pulling the plug)
I have run a 1 hour memory test from boot, with no faults reported.
I knew (from the install logs) that I had also installed an X11 update, so I couldn't be sure of the cause of the freeze at first.
2013-09-13 16:47:48 status installed libx11-6 2:18.104.22.168-0ubuntu2.2
However, using GRUB to load the old 3.2.0-52 kernel made the freezes stop.
This is my current normal mode of working.
Linux bugbear-fs 3.2.0-52-generic #78-Ubuntu SMP Fri Jul 26 16:23:24 UTC 2013 i686 i686 i386 GNU/Linux
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04.3 LTS
How do I proceed?