Problem changing users in Ubuntu 13.10

Question

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

score 2 · Answer 1 · edited Jan 27 '14 at 15:22

2

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.

edited Jan 27 '14 at 15:22

Braiam

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answered Nov 27 '13 at 07:04

Sukupa91

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Hi, I try what you suggest but it didn’t help. I even notify typo, but didn't help. – Lauri Nov 29 '13 at 13:49

score 2 · Answer 2 · answered Nov 28 '13 at 16:22

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.

answered Nov 28 '13 at 16:22

paux

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I think problem might be something to do about graphic drivers. I've learn new things about my computer and i notice that i have dual graphics(updated details to original message). But my Ubuntu know only one. I know that Ubuntu supports dual graphics but i haven been able to find good proprietary driver installation guide for dual graphics. Somehow i always end up watching black screen and doing Ubuntu re-installation.. – Lauri Nov 29 '13 at 14:19

Problem changing users in Ubuntu 13.10

2 Answers2