Hello there.

So far
I have been running Slack' 13.1 for half a year, and have been quite pleased with it, so I decided to make the jump to 13.37.
I had no content to backup, so I just went ahead and wiped the partitions and built everything from scratch again.

The problem
arose when I completed the installation, and exited to reboot for the first time. Shortly after the LILO-screen the screen goes blank.
There *IS* disc activity. I am able to blindly login and perform commands, and X also works properly (I can hear the KDE-boot "fanfare".)

The real issue here is that the screen does not actually "go blank", per se, I tried shoving a lamp up close to the screen and
revealed that there is screen activity. I can see lines of text if the lamp is close enough, which narrows down the issue to this:

The monitor backlights shut off at boot.


This is what I've tried (whether or not it's relevant to my case is a different discussion)

- TAB'ing at LILO-screen to boot with "Linux vga=normal", "Linux vga=ask" or "Linux vga=high"

- Typing both these snippets in terminal as root

Code:

xrandr -d :0 -o right
xrandr -d :0 -o normal

- Reinstalling the system ~5-6 times with different file-systems, resized swap/root partitions
- Choosing both "vga=standard" and "vga=ask" during setup
- Running memtest at cd-boot while I slept this night
- Someone claimed that "nomodeset" would solve it somehow, but it had no effect when typing it in terminal, at least.


I can not SSH into it for file retrieval, as it is not configured for internet.

Take in consideration that Slackware is my first and only Linux-experience, so please don't torch me for making "obvious" mistakes,
such as typing commands in terminal instead of somewhere else, etc. Constructive criticism is always welcome

Thanks in advance!
Best regards, Krystah

Finally figured it out. I have to boot with the "acpi=off" flag.

Now to find out how to make it boot with the flag as default..