init script hangs during boot

[Yuan Song]

I am using ubuntu 14.04. I upgraded kernel from 3.13.0-76 to 3.19.0-47. But I can not boot the machine after the upgrade. I can still boot into 3.13.0-76. The init script somehow just hangs. The machine is still alive. I can still see output from screen if I press power button. I thought it was because of graphics card driver. I booted into rescue mode and updated the nvidia driver. But still failed to boot. I can make it work if I boot into rescue mode, do a fsck, and resume normal boot. The machine can come up normally. But normal boot does not work. The graphics card I have is NVIDIA Corporation GT218 [GeForce 210]. Attached is the dmesg log. There are two stack dumps in the log.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: sysv-rc 2.88dsf-41ubuntu6.2
ProcVersionSignature: Ubuntu 3.13.0-76.120-generic 3.13.11-ckt30
Uname: Linux 3.13.0-76-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Jan 21 19:21:15 2016
InstallationDate: Installed on 2013-04-02 (1025 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
PackageArchitecture: all
SourcePackage: sysvinit
UpgradeStatus: Upgraded to trusty on 2014-04-19 (642 days ago)