Normally I was experienced system hanged (sometime is freeze) more than 10 times because I opened up to 10 tabs in google-chrome.
But now I think this problem came from kernel because I was reduced my applications usage but sometime is still hang or freeze.
Ubuntu booted more than approx 30 second. And logged in approx 30 second.
But not mean my system is slow, I install 4 GB ram and system see 3.8 GB (normal) and Quad-CPU 1.8 GHz from Intel. And I did not used SSD. I Tweak my system by enable swap zram
Now my system was hang and freeze again. No things happen when press (Alt+Fn+PrntScr (Which is SysRQ button) + F).
I was press this to made system restart (Alt+Fn+PrntScr+R, E, I, S, U, B) and system was restarted.
I was config this to make system not be freeze but cannot.
/etc/sysctl.conf :
vm.swappiness=10
vm.oom_kill_allocating_task=0
vm.overcommit_memory=0
vm.overcommit_ratio=99
vm.laptop_mode=5
Which about VM of Kernel Config.
Before system freeze I found that my free ram space very low (Free Mem approx 180MB, Free Buffer/Cache approx 650MB)
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-37-generic 3.13.0-37.64
ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
Uname: Linux 3.13.0-37-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/hwC0D3', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D3p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: XTERM
Date: Fri Oct 10 17:19:39 2014
HibernationDevice: RESUME=UUID=71ac432f-0009-48e0-85c1-272ee61c1ed6
InstallationDate: Installed on 2014-01-08 (274 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: Dell Inc. Inspiron 3421
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic.efi.signed root=UUID=e817c77a-3893-4a86-ac8a-8c3e3a025016 ro quiet splash quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.13.0-37-generic N/A
linux-backports-modules-3.13.0-37-generic N/A
linux-firmware 1.127.7
SourcePackage: linux
StagingDrivers: zram rts5139
SystemImageInfo: Error: [Errno 2] No such file or directory: 'system-image-cli'
UpgradeStatus: Upgraded to trusty on 2014-04-19 (174 days ago)
dmi.bios.date: 09/09/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 0YKV02
dmi.board.vendor: Dell Inc.
dmi.board.version: A08
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd09/09/2013:svnDellInc.:pnInspiron3421:pvrNotSpecified:rvnDellInc.:rn0YKV02:rvrA08:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Inspiron 3421
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.
Not worry about it