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Thread: Gnome-panel disappearance

  1. #1
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    Feb 2011
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    Ubuntu 10.10 Maverick Meerkat

    Question Gnome-panel disappearance

    I've already asked about this problem here: http://superuser.com/questions/24268...u-10-10/242700
    but unfortunately nothing has helped so far.
    The problem is that today, after about a week of normal running my taskbar disappeared. Alt+F2 also doesn't work, and it is VERY inconvenient because I can't run almost any application unless I can find their executables, which is hard because I am an absolute beginner in Linux. I tried deleting gnome settings (rm -rf .gnome .gnome2 .gconf .gconfd), I tried deleting general settings (rm -rf ~/.config/), I tried reinstalling gnome-panel (sudo apt-get --purge remove gnome-panel, sudo apt-get install gnome-panel), I tried sudo apt-get install gnome-desktop, which downloaded and updated some stuff, but NOTHING helped.

    Googling for hours for a fix, I found someone mentioning that it might be due to 3d hardware acceleration and I do remember yesterday installing a program that supposedly does that, BUT since Ubuntu refused to understand the nvidia driver package that I had downloaded from the official nvidia site I have no video drivers installed (not even the ones ubuntu suggested to install, because I have an extremely crappy internet connection atm, it would take me half a day to download them). In the end, the program said that it can't find supported hardware or drivers or smth like that.

    The main question is - how can I get back my desktop environment? I can currently only browse my hard drives and open the web browser thanks to the desktop shortcuts I already had.
    Of course, I have lots of other questions, mainly about silly/stupid/extremely annoying things, but that's for later.

  2. #2
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    Ubuntu 12.04 Precise Pangolin

    Re: Gnome-panel disappearance

    What happens if you run "gnome-panel" from the command line?
    Does it come back, does it crash, etc?

  3. #3
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    Xubuntu 12.04 Precise Pangolin

    Re: Gnome-panel disappearance

    The mentioned directory removal fix will only work if you logout before and do it at the console, press Alt+Ctrl+F1 to switch to one. But you only have to remove "~/.gconf/apps/panel/" and "~/.gnome2/panel2.d".

    The mentioned package removal/reinstalling fixes wont affect your settings.

  4. #4
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    Ubuntu 10.10 Maverick Meerkat

    Re: Gnome-panel disappearance

    Quote Originally Posted by cjhabs View Post
    What happens if you run "gnome-panel" from the command line?
    Does it come back, does it crash, etc?
    it says:
    "(gnome-panel:1910):Gtk-WARNING **: cannot open display:"

    @Krytarik - it doesn't help no matter where I do it.

    How is it even possible that installing one program (assuming that's what caused it) disables most of the GUI? That is a damn unreasonable bug, such things should never happen!
    Last edited by jurchiks; February 8th, 2011 at 11:19 AM.

  5. #5
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    Re: Gnome-panel disappearance

    You need to run this from a terminal window while in the windowing system, not from an Alt-Fx console.

  6. #6
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    Re: Gnome-panel disappearance

    Quote Originally Posted by cjhabs View Post
    You need to run this from a terminal window while in the windowing system, not from an Alt-Fx console.
    +1

    Besides this, are there any serious errors logged in "~/.xsession-errors"?

  7. #7
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    Re: Gnome-panel disappearance

    Quote Originally Posted by cjhabs View Post
    You need to run this from a terminal window while in the windowing system, not from an Alt-Fx console.
    In case you couldn't read it, I clearly wrote "it doesn't work no matter where I do it"! And I also wrote that Alt+F2 DOES NOT WORK for me.
    Being a smartass doesn't help.

    @Krytarik -
    I reinstalled my ubuntu yesterday and all I changed was some ordering on panels and in start menu. I didn't even install anything except chromium, no updates, nothing else. Clean install, extremely minor changes.

    These are the errors that I have in the file you mentioned.
    What matters is the compiz part, but why the hell would it refuse to load it?
    I don't have any video drivers installed, but it ran fine yesterday.


    Code:
    (polkit-gnome-authentication-agent-1:1567): GLib-GObject-WARNING **: cannot register existing type `_PolkitError'
    
    (polkit-gnome-authentication-agent-1:1567): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
    ** Message: applet now removed from the notification area
    /usr/bin/compiz (core) - Fatal: Software rendering detected.
    /usr/bin/compiz (core) - Error: Failed to manage screen: 0
    /usr/bin/compiz (core) - Fatal: No manageable screens found on display :0.0
    Window manager warning: Workarounds for broken applications disabled. Some applications may not behave properly.
    Unable to find a synaptics device.
    Initializing nautilus-gdu extension
    ** (update-notifier:1785): DEBUG: --security-updates-unattended: 0
    
    ** (update-notifier:1785): DEBUG: aptdaemon on bus: 0
    ** (update-notifier:1785): DEBUG: Skipping reboot required
    /usr/bin/jockey-gtk:130: Warning: g_str_has_suffix: assertion `str != NULL' failed
      gtk.main()
    Nautilus-Share-Message: Called "net usershare info" but it failed: 'net usershare' returned error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No such file or directory
    Please ask your system administrator to enable user sharing.
    Regarding "Workarounds for broken applications disabled" - it doesn't affect this, tried enabling and no effect.
    Last edited by jurchiks; February 9th, 2011 at 10:32 AM.

  8. #8
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    Re: Gnome-panel disappearance

    I think we can now rule out any errors in the config of gnome-panel.

    What if you load Metacity instead of Compiz, and the run gnome-panel again:
    Code:
    metacity --replace
    setsid gnome-panel
    Check .xsession-errors after that.

    PS: Alt+F2 isn't working because it's a feature of gnome-panel.

  9. #9
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    Ubuntu 10.10 Maverick Meerkat

    Re: Gnome-panel disappearance

    It says:
    "Window manager error: Unable to open X display"
    Last edited by jurchiks; February 9th, 2011 at 04:52 PM.

  10. #10
    Join Date
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    Re: Gnome-panel disappearance

    Quote Originally Posted by jurchiks View Post
    If I type it in while logged in, it says:
    "Window manager error: Unable to open X display"
    I'll try before logging in now.
    You have to be logged in and run it in a terminal.

    EDIT: Is this the output of the first or the second command?
    Last edited by Krytarik; February 9th, 2011 at 04:54 PM.

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