3

After 10 minutes my desktop computer darkens the screen, and when I move the mouse or tab any key it comes back alive and asks for my password. That is perfect and the behavior I like to have it.

But sometimes (mostly after a longer period) I can't get back to the login screen.

Nothing happens when moving mouse or press a key. Only way to get the computer back working is by restarting with reset button on the machine.

Has anyone an idea what I need to do?

I have a AMD HD 7950 grapics card with the 13.12 driver.

Ubuntu is 13.10 with Unity.

Here is a link to a blogger with the same problem:

Ubuntu Suspend Won't Wake Up: My Quest - wafflesatnoon.com

Community
  • 1
Evenbit GmbH
  • 4,726

3 Answers3

1

This bug in launchpad has some workaround which works for many users who have been using Ubuntu 13.10. Hope it works for you too.

Just follow these steps and try it once:

  1. Copy the grub file first as backup for safety:

    sudo cp /etc/default/grub /etc/default/grub_back

    taking the backup of original /etc/default/grub file, in case some error occurs we can get back to original state

  2. Open grub file to edit:

    sudo gedit /etc/default/grub

    opening the file in gedit to make the changes.

  3. Once file opened replace following line :

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

    to the line:

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=force"

    Note: The next line to the line mentioned above should be GRUB_CMDLINE_LINUX="" not GRUB_CMDLINE_LINUX="acpi_osi=Linux". Just check for the differences.

    save and close the file.

  4. Update the grub and restart your system once:

    sudo update-grub
sudo reboot

Please reply if something goes wrong or you need any clarifications.

Saurav Kumar
  • 15,174
-1

I had this same problem on my laptop. The only way I could come out of the screen dimmed state was to use the FN + "Screen" key on my laptop. In my case (on an Acer laptop), it was FN + F6. Strangely enough, it comes back on as soon as I hit the FN key, but it won't come on if I move the mouse, touch the touchpad, press any keys, etc. Pressing the FN key was the only thing that worked.

TheOdd
  • 3,012
royalt213
  • 1
-2

Install the latest proprietary graphics driver on your PC.

At the moment to avoid restarts I would just disable the screen lock in the options.

PS: please give more details about your computer, OS version, graphics card, etc. The more the better

Brask
  • 1,588