Kubuntu 7.10 finishes loading then backlight turns off

[DrBOK]

Hi everyone.

I ran Kubuntu from the cd last night with the intention of installing it, but everything is fine until Kubuntu finishes loading then it just switches my laptop backlight off. I can still see Linux in on the screen, but without the light its very hard to do anything. Its not my laptop because Vista works fine.
It wont come back on until I completely switch it off, a restart does not work.

I have had to revert to Debian which seems to work (with the vesa settings for xserver, otherwise no screens found)

Im using a HP pavillion laptop, with Nvidia Geforce 8400M gfx.

Id appreciate if anyone could help me, thanks.

[pookito]

Re: Kubuntu 7.10 finishes loading then backlight turns off

I think it is the default configuration that it has. I was having the same problem last night and realize that the way to get it off was by right clicking in the battery icon on the system tray and play with it. I think it is set in such a way that when you are idle for more than 1 minute it will conserve energy, mainly when you are running on batteries. I do not know how I made it stay they way I wanted to, but it worked. So just play with it and you will get it.

[Ace2016]

Re: Kubuntu 7.10 finishes loading then backlight turns off

I'm also using a hp pavillion with an nvidia card, and i installed and booted kubuntu, kdm looked nice and i logged in, and the lcd went black, i was scared s$$tless, i thought it had just destroyed my backlight, everything was black, i pressed alt+f2 and i could see the faint outline of the run box, so i restarted it, and the hp logo was nice and bright and it went black again the second grub shows, maybe due to the way hp has set the laptops to remember the birghtness settings, well to me the logical assumption was that the backlight was damaged and that it could no longer sustain being lit, so i thought about taking it to the repair centre, but before i did i had to delete some stuff from vista and thank god i did because once i guessed my way through the grub menu and it booted, the lcd came back up to normal brightness. wow i was so happy then.

I also decided to install debian, i had to use the debian lenny installer and upgrade to sid since etch doesn't have a new enough kernel to see both hard disks and compiled kernel 2.6.23 to get the function keys which control brightness to work, but now everything is nice, i also had to modify my /etc/modprobe.d/alsa-base and add options snd-hda-intel model=laptop to get sound out to work, debian didn't have xgl so i used fiesty's xgl and it worked fine here and everything is now working well

I really think that adding that app at startup was an insanely dumb thing to do, you'd scare the life out of a new user, they'd probably never use linux again

Oh the fix, you have to press ctrl+alt+f1 to get into a terminal, login and cd to /usr/share/autostart and delete guidance power manager or something that, something power/backlight related, can't remember the name, and then ctrl+alt+f7 and login as normal, it'll work fine.