Posts Tagged ‘system hanging

Problems faced with Ubuntu 12.04 LTS in Lenovo Z580: Black/Purple Screen + OverHeat + Hanging of system and returning to Login Screen.

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  • Lenovo Z580
  • Ubuntu 12.04 LTS

PROBLEM 1: Black Screen recurrence and OverHeat generation in machine
Many a time, my machine got hanged and produced black/purple screen.After that I had to forcefully shutdown and restart the machine.

For this, I made changes in the grub file as below,

To go to the grub file —> gksudo gedit /etc/default/grub

grub file:

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'

GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX="noapic, nolapic"

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)

# Uncomment to disable graphical terminal (grub-pc only)

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux

# Uncomment to disable generation of recovery mode menu entries

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

Then in the terminal run,

sudo update-grub

PROBLEM 2: System getting stuck and returning to login screen:

After resolving the black screen problem, system still faced the problem of getting stuck while working on something and when I pressed Ctrl+Alt+Del, after sometime it took me to a command screen which said ,

could not write bytes: broken pipe.
checking battery state.

and then to the login screen.Now when I logged in, the programs, that I was working on, where closed without saving.

If this is what, even you are facing, then below is the solution for it.

It might be due to,

1. Mimatch of the nvidia version when we installed Ubuntu with that of the version getting updated.This mismatch in version doesn’t compatibilize with eachother and causes screen hanging.
For this, use the below commands

sudo apt-get purge nvidia-*

Here we purge nvidia instead of removing it.

  • PURGE: ‘purge’ removes nvidia completely from your machine including the configuration files.
  • REMOVE: ‘remove‘ removes the software but not the configuration files.
sudo apt-get install nvidia-current-updates

Above command does a fresh new installation of the latest nvidia onto your system.

2. Also check that Ubuntu 12.04 uses ldm and not gdm because it is said Ubuntu 12.04 uses lightdm(ldm) as its display manager.
For changing, exhibit the following commands,

sudo apt-get install lightdm
sudo dpkg-reconfigure lightdm
sudo stop gdm
sudo start ldm

Now Restart your system and it should work fine without getting stuck.

Any Driver Problems:
When you install Ubuntu from your USB card/CD, it doesn’t give you third party software in readymade Eg: Wifi-Drivers , Bluetooth Drivers etc.,

For this ,you should either carry out your installation with Internet on, so that latest packages will also be updated
When u install Ubuntu in your machine without Internet, you have to manually install the driver packages.

Have a great day 🙂