Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I've been running 12.10 for ~(two weeks) now and have had my fair share of trouble with it. Of course, this has thought me a great deal of lessons of using ubuntu, the command line and Linux in general. It also sparked my interests in open-source/free software and why it is so precious. I've learned to respect the community and am actively learning my way through.

Now, last night I attempted to optimize my laptop power consumption and installed, amongst others, powertop. As far as I can recall, I didn't do anything dramatic to my system, except changing the power governor from ondemand to powersave.

This morning the system goes into a flashing cursor in top left after boot. At this mode I can't enter TTY-s using ctrl-alt-F(1-7). So, I reboot -> Advanced options for... -> ...(recovery mode) -> root and attempted to play with lightdm as was done here. Initially there was a problem with the /var/lib/dpkg/lock and /var/lib/apt/lists/lock . So I removed the locks. Then tried

dpkg-reconfigure lightdm

and it worked (no error messages). Rebooted and started normally and this time even the cursor went fishing. So, no flashing, no I/O whatsoever (to a mortal).

Then, went back to recovery -> root and did some of the listed options, namely: check the file systems (fsck), update grub bootloader (grub). Tried to failsaveX and that didn't start either. So, back to root shell and

apt-get install --reinstall lightdm

I also set the power gov back to "ondemand". Also tried several other things, which are to my judgement, not worth mentioning.

So, quite desperate. Please give a pointer as to how to proceed.

SYSTEM SPECS: Ubuntu 12.10 on a DELL E6420 laptop. All worked out-of-the box with 12.10, with the occasional crash upon system update.

EDIT [1]:

cat /etc/X11/default-display-manager

returns

/usr/sbin/lightdm

When I try

sudo service lightdm start 

System goes back into black screen with no I/O option.

EDIT [2]:

After some reading and testing, the problem emerged as wireless not working. So, connected to ethernet. Then run the same commands as above (udpated lightdm) and log-in screen appeared, but could not connect. Then, went back into tty1 and re-installed compiz and unity. Then reboot and BAM - works!

As to the many existing issues with Linux, I could, with my lately gathered understandings and skills, generalize the main cause of errors in Linux is the keyboard operator (aka ME).

Thanks!

share|improve this question
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.