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Old 02-26-2013, 10:34 PM   #1
Registered: Aug 2010
Location: Chile
Distribution: Ubuntu 12.04
Posts: 69

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Yet another question about black screen with Ubuntu 12.04

Hi guys!!

I've installed Ubuntu 12.04 after fighting with the "black screen" issues.

This is what I did:

I firstly used the nomodeset with the LiveCD, and then I modified one line of the /etc/default/grub file like this (following internet advices):

I have screen resolution problems, so I modified the /etc/rc.local (also following internet tips), adding this two lines:

setpci -s 00:02.0 F4.B=00
echo 4 > /sys/class/backlight/acpi_video0/brightness
So now it does start with the screen turned on and with good resolution, but when I goes on suspend mode it doesn't wake up correctly and it comes back to the black screen. It also happens when I play some games.

I tried using this solution (the first script), even though I have no idea what I does, but I doesn't work.

I'm going nuts!! Every time I forgot to disable the screensaver, and I'm away, I come back to find the black screen and I have to turn it off!! Help please!!!

What can I do? any ideas??

I'm using a Notebook Acer Aspire 5734Z. Let me know what other information do you need.
Old 02-27-2013, 03:30 PM   #2
Registered: Aug 2007
Location: Ottawa
Distribution: Arch Linux/Kubuntu/OpenSUSE
Posts: 300

Rep: Reputation: 37
Whenever I have screen resolutions, I usually create and customize an /etc/X11/xorg.conf file.

Unfortunately, creating this file is super complicated, as you need to detail every last bit about your hardware, including video drivers, native resolutions, and every single last modeline you wish to support.

There are howtos out there on the web for how to do this.

First, create the file automatically:

If you're going to create modelines, this modeline calculator is invaluable:

Anyways, this road takes quite a bit of effort... I've been doing this since 2007 and still have trouble in doing so.

The plus side is that you can specify which video driver you wish to use, and remove superfluous options.
Old 02-27-2013, 04:17 PM   #3
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Registered: Feb 2004
Location: SE Tennessee, USA
Distribution: Gentoo, LFS
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I could not add one single thing to what has already just been said ... except to suggest that you might wish to get a Knoppix DVD and boot it up on your system, then see what sort of configuration it came up with, assuming that it somehow succeeded in presenting you with a GUI screen that works.

Also: the key-sequence Ctrl+Alt+1..4 usually cycles between the GUI screen and one-or-more terminal sessions. Try it. If it does, then you can be sure that XOrg/X11 is in control, even though it does not yet have settings which allow it to correctly drive your particular hardware. That, in and of itself, is a major conclusion.
Old 02-27-2013, 04:40 PM   #4
Registered: Aug 2010
Location: Chile
Distribution: Ubuntu 12.04
Posts: 69

Original Poster
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Sounds like complicate
Old 02-27-2013, 09:27 PM   #5
Registered: Aug 2010
Location: Chile
Distribution: Ubuntu 12.04
Posts: 69

Original Poster
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I'll try other distros... I have tried Linux Mint and Trisquel before, and had the same problems though. I'll try non-ubuntu based distros and see what happens. It's a pity this thing still happens, I thought with the new ubuntu version this issue would have been fixed


black screen, screen, screensaver, ubuntu 12.04

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