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Lauri
Asked: 2013-11-20 10:49:04 +0800 CST

Problem changing users in Ubuntu 13.10

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I got problem with changing users. I got two user accounts, one root and one normal user. When normal user login and after a while lock screen appears or you try to change user and you press change user, you got a black screen, no back-light or nothing but i can hear Ubuntu tune playing.

After using terminal command startx i end up looking root user background or got an error message that tells unable to connect to x server: Connection refused. Only reboot helps or it's only thing i know how to do it. :)

So is this something i can fix by reinstalling something or is this something i should report as a bug?

Ubuntu 13.10, Gallium 0.4 on AMD ARUBA(using one graphic card..), Dual graphics AMD Radeon hd7640g + 7600m.

Computer Samsung Series3 np355v5c-s08se

switch-user

2 Answers

  1. Start your solution by opening the terminal (Alt+Ctrl+T) and enter: 

    sudo /usr/lib/lightdm/lightdm-set-defaults --show-manual-login true

    Restart the computer, hope it will work, if it doesn't remove ~/.Xauthority in home by 

    sudo rm ~/.Xauthority

    then you can easily login.

    If you have installed cinammon then, try the following: 

    sudo apt-get remove --purge cinnamon*`
sudo apt-get autoremove

    If you don't have cinnamon installed but any other desktop environment alongside Unity, try to uninstall those. (Gnome fallback should be fine though). hope it will work.

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  2. I had a similar problem, but with proprietary drivers for an NVIDIA graphics card. I had used the nvidia-319-updates package which seems to automatically update the proprietary driver to latest versions. Switching to the tested nvidia-319 made the problem disappear.

    As you seem to have AMD, try a different or free driver to see if that's the cause. You can use the "Software & Updates" program on tab "Additional Drivers" to select the driver.

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