The computer while working suddenly freezes, Audio is heard, Mouse movement is detected, Screen freezes.
Poweroff & On bring the computer up.
Frquence: Often
[PC details]
/etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04.3 LTS"
apt-cache policy
Package files:
100 /var/lib/dpkg/status
release a=now
500 http://extras.ubuntu.com/ubuntu/ precise/main i386 Packages
release v=12.04,o=LP-PPA-app-review-board,a=precise,n=precise,l=Application Review Board PPA,c=main
origin extras.ubuntu.com
500 http://extras.ubuntu.com/ubuntu/ precise/main amd64 Packages
release v=12.04,o=LP-PPA-app-review-board,a=precise,n=precise,l=Application Review Board PPA,c=main
origin extras.ubuntu.com
500 http://security.ubuntu.com/ubuntu/ precise-security/universe Translation-en
500 http://security.ubuntu.com/ubuntu/ precise-security/restricted Translation-en
500 http://security.ubuntu.com/ubuntu/ precise-security/multiverse Translation-en
500 http://security.ubuntu.com/ubuntu/ precise-security/main Translation-en
500 http://security.ubuntu.com/ubuntu/ precise-security/multiverse i386 Packages
release v=12.04,o=Ubuntu,a=precise-security,n=precise,l=Ubuntu,c=multiverse
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu/ precise-security/universe i386 Packages
release v=12.04,o=Ubuntu,a=precise-security,n=precise,l=Ubuntu,c=universe
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu/ precise-security/restricted i386 Packages
release v=12.04,o=Ubuntu,a=precise-security,n=precise,l=Ubuntu,c=restricted
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu/ precise-security/main i386 Packages
release v=12.04,o=Ubuntu,a=precise-security,n=precise,l=Ubuntu,c=main
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu/ precise-security/multiverse amd64 Packages
release v=12.04,o=Ubuntu,a=precise-security,n=precise,l=Ubuntu,c=multiverse
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu/ precise-security/universe amd64 Packages
release v=12.04,o=Ubuntu,a=precise-security,n=precise,l=Ubuntu,c=universe
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu/ precise-security/restricted amd64 Packages
release v=12.04,o=Ubuntu,a=precise-security,n=precise,l=Ubuntu,c=restricted
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
release v=12.04,o=Ubuntu,a=precise-security,n=precise,l=Ubuntu,c=main
origin security.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise-backports/universe Translation-en
500 http://in.archive.ubuntu.com/ubuntu/ precise-backports/restricted Translation-en
500 http://in.archive.ubuntu.com/ubuntu/ precise-backports/multiverse Translation-en
500 http://in.archive.ubuntu.com/ubuntu/ precise-backports/main Translation-en
100 http://in.archive.ubuntu.com/ubuntu/ precise-backports/multiverse i386 Packages
release v=12.04,o=Ubuntu,a=precise-backports,n=precise,l=Ubuntu,c=multiverse
origin in.archive.ubuntu.com
100 http://in.archive.ubuntu.com/ubuntu/ precise-backports/universe i386 Packages
release v=12.04,o=Ubuntu,a=precise-backports,n=precise,l=Ubuntu,c=universe
origin in.archive.ubuntu.com
100 http://in.archive.ubuntu.com/ubuntu/ precise-backports/restricted i386 Packages
release v=12.04,o=Ubuntu,a=precise-backports,n=precise,l=Ubuntu,c=restricted
origin in.archive.ubuntu.com
100 http://in.archive.ubuntu.com/ubuntu/ precise-backports/main i386 Packages
release v=12.04,o=Ubuntu,a=precise-backports,n=precise,l=Ubuntu,c=main
origin in.archive.ubuntu.com
100 http://in.archive.ubuntu.com/ubuntu/ precise-backports/multiverse amd64 Packages
release v=12.04,o=Ubuntu,a=precise-backports,n=precise,l=Ubuntu,c=multiverse
origin in.archive.ubuntu.com
100 http://in.archive.ubuntu.com/ubuntu/ precise-backports/universe amd64 Packages
release v=12.04,o=Ubuntu,a=precise-backports,n=precise,l=Ubuntu,c=universe
origin in.archive.ubuntu.com
100 http://in.archive.ubuntu.com/ubuntu/ precise-backports/restricted amd64 Packages
release v=12.04,o=Ubuntu,a=precise-backports,n=precise,l=Ubuntu,c=restricted
origin in.archive.ubuntu.com
100 http://in.archive.ubuntu.com/ubuntu/ precise-backports/main amd64 Packages
release v=12.04,o=Ubuntu,a=precise-backports,n=precise,l=Ubuntu,c=main
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/universe Translation-en
500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/restricted Translation-en
500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/multiverse Translation-en
500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/main Translation-en
500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/multiverse i386 Packages
release v=12.04,o=Ubuntu,a=precise-updates,n=precise,l=Ubuntu,c=multiverse
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/universe i386 Packages
release v=12.04,o=Ubuntu,a=precise-updates,n=precise,l=Ubuntu,c=universe
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/restricted i386 Packages
release v=12.04,o=Ubuntu,a=precise-updates,n=precise,l=Ubuntu,c=restricted
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/main i386 Packages
release v=12.04,o=Ubuntu,a=precise-updates,n=precise,l=Ubuntu,c=main
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/multiverse amd64 Packages
release v=12.04,o=Ubuntu,a=precise-updates,n=precise,l=Ubuntu,c=multiverse
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/universe amd64 Packages
release v=12.04,o=Ubuntu,a=precise-updates,n=precise,l=Ubuntu,c=universe
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/restricted amd64 Packages
release v=12.04,o=Ubuntu,a=precise-updates,n=precise,l=Ubuntu,c=restricted
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
release v=12.04,o=Ubuntu,a=precise-updates,n=precise,l=Ubuntu,c=main
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise/universe Translation-en
500 http://in.archive.ubuntu.com/ubuntu/ precise/restricted Translation-en
500 http://in.archive.ubuntu.com/ubuntu/ precise/multiverse Translation-en
500 http://in.archive.ubuntu.com/ubuntu/ precise/main Translation-en
500 http://in.archive.ubuntu.com/ubuntu/ precise/multiverse i386 Packages
release v=12.04,o=Ubuntu,a=precise,n=precise,l=Ubuntu,c=multiverse
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise/universe i386 Packages
release v=12.04,o=Ubuntu,a=precise,n=precise,l=Ubuntu,c=universe
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise/restricted i386 Packages
release v=12.04,o=Ubuntu,a=precise,n=precise,l=Ubuntu,c=restricted
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise/main i386 Packages
release v=12.04,o=Ubuntu,a=precise,n=precise,l=Ubuntu,c=main
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise/multiverse amd64 Packages
release v=12.04,o=Ubuntu,a=precise,n=precise,l=Ubuntu,c=multiverse
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise/universe amd64 Packages
release v=12.04,o=Ubuntu,a=precise,n=precise,l=Ubuntu,c=universe
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise/restricted amd64 Packages
release v=12.04,o=Ubuntu,a=precise,n=precise,l=Ubuntu,c=restricted
origin in.archive.ubuntu.com
500 http://in.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
release v=12.04,o=Ubuntu,a=precise,n=precise,l=Ubuntu,c=main
origin in.archive.ubuntu.com
Pinned packages:
lspci
00:00.0 RAM memory: NVIDIA Corporation MCP61 Memory Controller (rev a1)
00:01.0 ISA bridge: NVIDIA Corporation MCP61 LPC Bridge (rev a2)
00:01.1 SMBus: NVIDIA Corporation MCP61 SMBus (rev a2)
00:01.2 RAM memory: NVIDIA Corporation MCP61 Memory Controller (rev a2)
00:01.3 Co-processor: NVIDIA Corporation MCP61 SMU (rev a2)
00:02.0 USB controller: NVIDIA Corporation MCP61 USB 1.1 Controller (rev a3)
00:02.1 USB controller: NVIDIA Corporation MCP61 USB 2.0 Controller (rev a3)
00:04.0 PCI bridge: NVIDIA Corporation MCP61 PCI bridge (rev a1)
00:05.0 Audio device: NVIDIA Corporation MCP61 High Definition Audio (rev a2)
00:06.0 IDE interface: NVIDIA Corporation MCP61 IDE (rev a2)
00:07.0 Bridge: NVIDIA Corporation MCP61 Ethernet (rev a2)
00:08.0 IDE interface: NVIDIA Corporation MCP61 SATA Controller (rev a2)
00:08.1 IDE interface: NVIDIA Corporation MCP61 SATA Controller (rev a2)
00:09.0 PCI bridge: NVIDIA Corporation MCP61 PCI Express bridge (rev a2)
00:0b.0 PCI bridge: NVIDIA Corporation MCP61 PCI Express bridge (rev a2)
00:0c.0 PCI bridge: NVIDIA Corporation MCP61 PCI Express bridge (rev a2)
00:0d.0 VGA compatible controller: NVIDIA Corporation C61 [GeForce 6150SE nForce 430] (rev a2)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
