I have also been facing this problem for a long time. It began with 12.04LTS as I remember. Previously the system was stable as a rock running 10.04 LTS.
Tried to re-install the OS from scratch, but still facing the problem. Changed Video card, main board. Swapping RAM tried different graphics drivers, different available kernels but there is still random freezing. Could not effort to change the $1000 CPU... To me it happens most often when kicking on a link in Thunderbird to be opened in Firefox. Complete freeze, but the mice some times still moves around. No response from keyboard at all (numloc and capsloc LEDs does not change). Some times the system freeze when running in idle, and I discover this at logon screen. Normal uptime is about two three days between forced HW reboots. The strange about this bug is, that my kids runs a PC Intel Core i7-3770 3,4GHz Asrock/Gigabyte B75-Chipset mATX without facing any problem at all. I'm also user on the PC, running Gnome classic and compiz. I never log out, just switch user. It only reboots when applying new packages that requires a reboot, els its always running stable. Current configuration facing this problem: uptime 12:57:54 up 1 day, 2:22 Gnome Classic + Compiz Linux-x86_64 Intel(R) Core(TM) i7-3960X CPU @ 3.30GHz Kernel 3.8.0-34-generic NVIDIA GTX760 Driver Version: 319.32 /dev/sda Samsung SSD 840 16 GB Main Memory MB Rampage IV Extreme -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/993187 Title: ubuntu 12.04 completely freezes frequently. Status in “linux” package in Ubuntu: Fix Released Status in “xserver-xorg-video-intel” package in Ubuntu: Fix Released Status in “linux” source package in Precise: Fix Released Status in “xserver-xorg-video-intel” source package in Precise: Fix Released Bug description: Update: 6/12/2012 This bug is about a complete system lock-up. No other TTYs can be started. Mouse doesn't move. Keyboard doesn't react. The only solution is hard reset. Seems to happen on a variety of configurations, including nVidia, ATI and Intel graphics. If you are still able to TTY or SSH into other sessions, move the mouse or use the keyboard, file another bug. Thx. Joris V. (brains). Update: 5/21/2012 Updating the kernel to 3.3.6 as suggested by Michael in #91, the system seems stable, no freezes yet in 5-6 hrs of using and watching videos for couple of hrs. Original description: I recently installed newly released ubuntu 12.04 LTS 64 bit version on my desktop. And it is frequently freezing, for the first few hours it ran smoothly and when I started watching videos it started freezing randomly. I have to use hard restart every time. Initially it was only during videos but now even during normal browsing it is freezing. I am using on board graphics and do not have any graphics card installed. Can someone please help me here, I really love the new looks of 12.04 and it bugs me not being able to use :( Below is my hardware configuration: Processor: Intel CORE i3 processor (2nd generation) Board: Intel® Desktop Board DH67BL Ram: 4GB Graphics: On board HDD: 500 GB Please let me know if you need more information, or any specific logs I can capture (and how). Thanks, Ketan Patil To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/993187/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
