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I'm new to Linux (and also to Stack Exchange :)). I installed Ubuntu 16.04 on my laptop last week. It has a dual boot with Ubuntu and Windows 10. A strange problem occurred today. Two days ago, when I tried to boot up Ubuntu, my PC showed a blue screen after I entered my password. My desktop wallpaper hadn't appeared when I was entering the password - I hadn't noticed it back then.

I forced a reboot and tried again. The same thing happened every time. Finally I booted Windows and shut down my PC.

Since then, I haven't used Ubuntu till today. Windows 10 works fine. Now, when Ubuntu failed to load, I started Recovery Mode (GNU GRUB screen appears). I tried failsafeX, and something like "no screen found" appeared and it went back to the recovery mode menu. Then I ran dpkg, and it is stuck at the following lines (Something like these, I don't exactly remember):

[OK] Started Braille Device Support
[OK] Started udev Kernel Device Manager

It has been stuck at this screen for the last 10 minutes. I'm afraid my data will get corrupted if I try to force a reboot. Please help!!

PS. I haven't interrupted any visible update or installation while shutting down my PC.

Byte Commander
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Dimitri Markovich
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  • Did you insert any usb disks? – kenn Jan 08 '17 at 13:51
  • I only have the receiver of my wireless mouse inserted all the time....ever since I bought my laptop. Otherwise, no. – Dimitri Markovich Jan 08 '17 at 13:53
  • First of all welcome to the ubuntu community. Please calm down and be patient. – kenn Jan 08 '17 at 13:54
  • You have a few ways to recover your ubuntu installation, such as live.iso in a dvd or live.iso in a usb. – kenn Jan 08 '17 at 13:57
  • I entered recovery mode and selected dpkg. I mean, I selected the dpkg option in a menu similar to this : http://www.howtogeek.com/wp-content/uploads/2014/09/650x361xubuntu-14.04-recovery-mode-menu.png.pagespeed.gp+jp+jw+pj+js+rj+rp+rw+ri+cp+md.ic.tJHIR7oEvc.png – Dimitri Markovich Jan 08 '17 at 14:02
  • When you attempted to login, did you reach DM login screen like this one http://3.bp.blogspot.com/-fgfBHvKwkEA/UiRqrTm9etI/AAAAAAAAEbE/qHxq6h5mDj8/s1000/lightdm-login.jpg? – kenn Jan 08 '17 at 14:21
  • Yes I did. But after entering my password, only a blue screen appeared. – Dimitri Markovich Jan 08 '17 at 14:23
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    Possible duplicate of Unity doesn't load, no Launcher, no Dash appears. Your desktop just looks different than in the linked question. – David Foerster Jan 08 '17 at 14:24
  • @DavidFoerster My desktop wallpaper does not load, and neither can I see my mouse cursor. Even if I am to try the solution of the linked question, I have to open a terminal. dpkg is still running! How do I open a terminal from there? – Dimitri Markovich Jan 08 '17 at 14:29
  • What dpkg command did you issue? I doubt that it's still running. – David Foerster Jan 08 '17 at 14:36
  • If you have guest session in login screen you can try it. – kenn Jan 08 '17 at 15:12
  • Thanks everyone, I just solved the problem : I interrupted dpkg (Ctrl+C) and Ubuntu is running fine again. (In fact, I'm posting this from Ubuntu) There's only this popup in the title bar: "An error occurred, please run Package Manager from the right-click menu or apt-get in a terminal to see what's wrong. The error message was : ' Error: BrokenCount > 0'. This usually means that your installed packages have unmet dependencies" Do I need to do anything else now? Thanks again! :) – Dimitri Markovich Jan 08 '17 at 16:02

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I am also new to Linux. I think I have the same issue as you. I confront it while solving the blue screen issue following the last answer to this post Stuck on blue screen while booting the system .

When I saw this information, I simply restart the computer by pressing the button and it recovered from the blue screen issue.

Hope this helps.

RobertCRH
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