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Thread: Laptop Black Screen Error and Possible GPU Hang

  1. #1
    Join Date
    Mar 2013

    Thumbs up Laptop Black Screen Error and Possible GPU Hang


    Black Screen Error: use this command in terminal:
    sudo gedit /etc/rc,local
    and force your desired brightness level with this line of text:
    echo DESIREDVAL > /sys/class/backlight/acpi_video0/brightness
    Example of an edited rc.local:

    #!/bin/sh -e
    # rc.local
    # This script is executed at the end of each multiuser runlevel.
    # Make sure that the script will "exit 0" on success or any other
    # value on error.
    # In order to enable or disable this script just change the execution
    # bits.
    # By default this script does nothing.
    echo 10 > /sys/class/backlight/acpi_video0/brightness
    exit 0
    GPU Hang:
    My graphics driver was not installed, so I went and tried to install it. I couldn't so I updated to Raring Ringtail (13.04)


    As the title says, I'm getting a black screen and a possible GPU hang. The black screen occurs when I boot my laptop and once it completely boots (gets to the login screen) the screen says something like "PM Device: Failed to start error." and then the screen goes black. I know the computer is still on because I hear the amazing Ubuntu drum sound. This also happened when I installed Ubuntu using a live DVD. I heard the drum sound then, too. I was able to partially fix the problem by using an external moniter. After installing, I went to settings and turned on my laptop display. Everything seemed fine. But.. everytime I restart my computer I have to plug in the external screen and turn on the laptop display again. Obviously, this shouldn't happen. I also keep getting spammed with an error or something from apport. Could this have something to do with it?

    I've tried looking up solutions but I haven't found any that work. Here are my specs:

    Ubuntu 12.10 64-Bit
    Acer Aspire V3 731-4473 (Full specs here:
    I believe I installed this using the Boot Repair remix of Ubuntu, if you need to know that. Also, I had to erase Windows 8 completely.. because of the bane of my existance: UEFI. I used Legacy Boot to install and use Ubuntu.

    If you need more information, please ask. Any and all help or suggestions are welcome. Thanks in advance.
    Last edited by TheElfinGuy; April 3rd, 2013 at 05:13 AM. Reason: command missing root

  2. #2
    Join Date
    Nov 2004
    Ubuntu Development Release

    Re: Laptop Black Screen Error and Possible GPU Hang

    Hello TheElfinGuy,

    I think you may need to put nomodeset in your kernel line here's page that explains it. and this page explains what it does.
    Wireless script
    Registered Linux User #462608
    Ubuntu 15.04 /14.04 Ubuntu-Mate 15.10

  3. #3
    Join Date
    Mar 2013

    Re: Laptop Black Screen Error and Possible GPU Hang

    Hmm.. I'll try that if my current fix doesn't hold out. I installed laptop-mode-tools, configured it, and edited /etc/rc.local to force max brightness. Seems to work for now. How can I fix my GPU hangs? System Settings says Unknown for Graphics..ere

    EDIT: Right after replying I got another GPU hang error and an apport error. Here are some screenshots showing more details:
    Last edited by TheElfinGuy; March 29th, 2013 at 01:07 AM. Reason: more info

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