I'm not really experienced with Ubuntu and currently stuck with the installation of Ubuntu 14.04 LTS on my new Asus G751JY which came with Win8 preinstalled.

After deleting all pre-made partitions with the live-CD (incl. Win8), I installed Ubuntu (had to use the nomodeset parameter). I'm using the standard partitions created by Ubuntu itself, the only difference is that it's installed on /dev/sdb since that one is the SSD. ( /dev/sda is 1TB, partitioned ext4 by myself )

Unfortunately directly after rebooting (maybe 2 seconds) the laptop get's stuck at a simple purple background screen that I read about here sometimes already. It doesn't respond to any keystrokes except ctrl+alt+delete for reboot.

There is only a very short moment between the initialization of the reboot and the purple screen, but after some attempts I managed to get into grub by hitting shift like a maniac:
- replacing quiet splash or $linux_gfx_mode with nomodeset doesn't seem to change anything, it's still stuck
- before that I tried to edit nomodeset into the grub file and also created the file again via the live-CD, without any results - "Fast Boot" and "Launch CSM" is disabled in the BIOS
- however only for the optical drive the BIOS says that the boot option is "UEFI: long drivename", the other options are "ubuntu (PO: Samsung ...)"

System specs:
Intel HM87 (Lynx Point) Mainboard
Intel i7-4720HQ (4x2,6Ghz)
Geforce GTX 980M (4GB VRAM)
32GB RAM (4x8GB)

I would suspect that this has to do with the graphics driver not loading correctly, since I had to use nomodeset for the installation or maybe with the fact that Ubuntu is installed on /dev/sdb and somehow fails to load? But those are just my amateur thoughts ...

I really appreciate any help on this, since it prevents me from booting and using the laptop without the live-CD.

Greetings Christopher


Here's something to try: ctrl+alt+f2 login with username and pass. now type sudo service lightdm restart let me know if this helps otherwise we can try to remove lightdm and install gdm

  • Thanks for your reply! Unfortunately I don't get to the point where I can use this (or I'm using it at the wrong point), anyway it doesn't work at the empty purple screen. – Christopher Jul 14 '15 at 0:51
  • Maybe I can assist you further if you could post your computers specs. – A1 Computers Jul 14 '15 at 3:39

Ok, since I am new to Linux I finally "fixed" this after many hours of reading through forum posts and trying many different approaches by simply switching to 15.04 Vivid Vervet instead of 14.04.

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