Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm trying to install Kubuntu 13.04 on my laptop from a live USB. The live USB works fine, graphics, wireless etc. It all works. Installation works as well, but when I try to start the newly installed Kubuntu from the hard drive I first get a flashing Kubuntu logo, then just flickering lines, mostly white.

From that point I can't switch to a terminal or do anything other than the MagicSysRq combo. The same thing happens if I start with xforcevesa. If I start with nomodeset or radeon.modeset=0, I just end up with a black screen where the MagicSysRq combo doesn't work, but a quick press on the power button shuts the computer off immediately which tells me the kernel crashed.

The computer is a Dell Studio 1555 laptop with an ATI Mobility Radeon HD 4570 graphics card.

I have reinstalled without updates so that only packages from the live USB were installed. How can the live USB work, but not the installed version? Thank you for any help!

EDIT: To clarify, I never get past the kernel loading after installing to the hard drive.

share|improve this question
up vote 1 down vote accepted

I managed to get the system to boot by physically connecting to the internet (with an ethernet cable) and using the recovery root terminal to install the fglrx driver. That allowed me to get into the system. From there, I realized the fglrx driver no longer supports my graphics card so I had to use this: After installing fglrx-legacy everything seems to run smoothly.

Hopefully, this will be of use to someone else.

share|improve this answer
So, I assume there's a major bug in the free drivers? I'm experiencing this issue as well and your solution helped a lot. Has anyone reported this bug already? – SeveQ Jul 5 '13 at 8:52

how is it crashing ? Is Desktop crashing then returning to login-manager ?

for this was similiar like here ? :

Why running clamtk on 12.04 with kernel-update of today crashes the system?

I think it is to do too - with after updating of kernel-files and xserver-xorg-files.

The default settings of "brightness and lock" are then not correct at 13.04 too ?

Try "system-settings" in your desktop - go there to "brightness and lock" and adjust it too 30 minutes - and lock should stay switched off.

share|improve this answer
Sorry if I was unclear! After installing to the hard drive, I never get past the kernel loading. Graphics, or the kernel, crashes before the login screen. – Erik Natanael Gustafsson Jun 10 '13 at 9:47
is it PC or notebook ? - if PC - have you built yourself ? every contact of technical parts correctly set-in-its-place ? – dschinn1001 Jun 10 '13 at 11:50
It's a PC laptop. I've run Ubuntu on it for years and I'm dual-booting with Fedora 17 and Windows Vista so there is nothing wrong with the hardware. – Erik Natanael Gustafsson Jun 10 '13 at 12:09

Your Answer


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

Not the answer you're looking for? Browse other questions tagged or ask your own question.