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Black screen issue

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Max0123456 Posted messages 112 Status Member -  
mamiemando Posted messages 33228 Registration date   Status Moderator Last intervention   -
Hello,

I installed the Cinnamon graphical environment and when I log out and then log back in to change the environment, there's a black screen. I tried turning off and restarting the machine and rebooting in "Machine" > "Restart", but nothing works.

3 answers

  1.
    mamiemando Posted messages 33228 Registration date   Status Moderator Last intervention   7 940
     
    Hello,

    Two things can explain these symptoms:
    • there is no more space on your hard drive;
    • the driver for your video card is not/ no longer installed.


    To see the exact cause, you'll need to switch to text mode (ctrl alt f2).
    • Type your login (then press enter)
    • Type your password blindly (then press enter).


    You should see a command prompt, after which you can type commands.

    Example: replacing 
    my_login
    and my_password with the appropriate values 

    Debian GNU/Linux bookworm/sid machine tty2
    login: toto
    password:
    toto@machine:~$


    At the command prompt, type each of these commands (then press enter to execute each one). You should see their output below. Report it to us: 

    lspci | egrep 'VGA|3D' grep EE /var/log/Xorg.0.log df -h | grep /home


    Example: 

    (mando@silk) (~) $ lspci | egrep 'VGA|3D'
    00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
    00:13.0 Non-VGA unclassified device: Intel Corporation Sunrise Point-LP Integrated Sensor Hub (rev 21)


    If you want to shut down your computer you can run the command 
    sudo halt
    .
    If you need to switch back to graphical mode press ctrl alt f7.

    Good luck!
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  2. Max0123456 Posted messages 112 Status Member
     
    It worked with Ctrl+Alt+F7
    0
  3. mamiemando Posted messages 33228 Registration date   Status Moderator Last intervention   7 940
     
    Hello Max,

    It's a bit surprising, but that's good. Let me explain: normally ctrl alt f1 ... f7 are just used to "switch" between several virtual screens. From ctrl alt f1 to ctrl alt f6, you have text mode consoles (tty), and on ctrl alt f7 the graphical mode. It's a bit surprising that switching back and forth between text mode and graphical mode was enough to solve your screen problem... or maybe your computer was just in sleep mode, but that doesn't really match what you described.

    I'm marking the topic as resolved. If the problem reappears, please report the information I requested in my previous message and we'll see what we can do.

    Best of luck.
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