Looking at the error messages (dmesg | tail) I see an error concerning
bumblebeed - nvidia related daemon.

Do you guys know if there are video-card problems that may cause icons
to disappear?

Frank

On zo, 2014-05-11 at 17:18 +0000, Fabounet wrote:
> are you sure you don't drag the launcher out of the dock when you click on
> it ? it can happen especially with a mousepad.
> 
> if you want, you can lock the icons from the right-click menu.
> 
> 
> 2014-05-11 19:08 GMT+02:00 Frank Claessen <email address hidden>:
> 
> > Okay,
> >
> > I am trying different approaches .... getting back to you soon
> >
> > What really bugs me is the fact that I do not find other people complaining
> > about the same problem.
> >
> > Cheers
> >
> > Frank
> >
> >
> >
> > On Sun, May 11, 2014 at 6:29 PM, Fabounet <email address hidden> wrote:
> >
> > > do you have a kid that would make you some prank ? :D
> > >
> > > what if you quit the dock (from its menu) ?
> > > does the file disappear ?
> > > if not, what if you quit the dock, and then restart ?
> > >
> > >
> > > 2014-05-11 18:01 GMT+02:00 Frank Claessen <email address hidden>:
> > >
> > > > Hi Mathieu,
> > > >
> > > > No - I do not drag it from the app-menu. I right click and tell cairo
> > to
> > > > turn it into a launcher.
> > > >
> > > > The same problem occurs with the shortcuts applet.
> > > >
> > > > It also disappears and there is no pattern. Sometimes it takes a few
> > > > days and sometimes it disappears that same day.
> > > >
> > > >
> > > > I am trying to figure out whether it makes a difference if the laptop
> > is
> > > > shutdown with the aforementioned apps (applets) opened.
> > > >
> > > > Up to now I have not been able to find a reason
> > > >
> > > > Cheers
> > > >
> > > > Frank
> > > >
> > > >
> > > > On za, 2014-05-10 at 20:22 +0000, Matthieu Baerts wrote:
> > > > > Hello and thank you for this bug report! (and sorry for this very
> > very
> > > > > long delay!)
> > > > >
> > > > > This is strange that this 01firefox.desktop file is removed...
> > > > > Do you have this bug if you drag and drop the Firefox menu entry from
> > > > the applications menu?
> > > > >
> > > > > ** Description changed:
> > > > >
> > > > >   cairo dock version: 3.3.2
> > > > >   distro: linux  mint petra
> > > > >   desktop env: Cinnamon
> > > > >   windowmanager: Mutter (Muffin)
> > > > >   used with: openGl
> > > > >   graphics card: VGA compatible controller: Intel Corporation 3rd Gen
> > > > Core processor Graphics Controller (rev 09)
> > > > >
> > > > >   Bug description:
> > > > >
> > > > >   I launch Firefox and immediately turn it into a launcher.
> > > > >   Checking at .config/cairo-dock/current_theme/launchers does show
> > the
> > > > 01firefox.destkop file
> > > > >
> > > > >   Everything functioning allright
> > > > >
> > > > >   After reboot the launcher is gone and so is the 01firefox.desktop
> > > file
> > > > > -
> > > > > - output from cairo-dock:
> > > > > -
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-3.3.2/src/implementations/cairo-dock-glx.c:_initialize_opengl_backend:179)
> > > > > -   couldn't find an appropriate visual, trying to get one without
> > > > Stencil buffer
> > > > > - (it may cause some little deterioration in the rendering) ...
> > > > > -
> > > > > -
> > > >
> > >
> >  ============================================================================
> > > > > -     Cairo-Dock version : 3.3.2
> > > > > -     Compiled date      : Jan 21 2014 23:39:59
> > > > > -     Built with GTK     : 3.8
> > > > > -     Running with OpenGL: 1
> > > > > -
> > > >
> > >
> >  ============================================================================
> > > > > -
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-3.3.2/src/implementations/cairo-dock-glx.c:_is_blacklisted:54)
> > > > > -   This card is blacklisted due to a bug with your video drivers:
> > > Intel
> > > > 4000 HD Ivybridge Mobile.
> > > > > -  Please have a look there:
> > > > https://bugs.freedesktop.org/show_bug.cgi?id=55036
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-3.3.2/src/implementations/cairo-dock-glx.c:_post_initialize_opengl_backend:374)
> > > > > -   The OpenGL backend will be deactivated. Note that you can force
> > > this
> > > > OpenGL backend by launching the dock with this command: 'cairo-dock -o'
> > > > > -  OpenGL Version: 3.0 Mesa 9.2.1
> > > > > -  OpenGL Vendor: Intel Open Source Technology Center
> > > > > -  OpenGL Renderer: Mesa DRI Intel(R) Ivybridge Mobile
> > > > > - GldiShortkey '<Super>L' failed!
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-3.3.2/src/gldit/cairo-dock-keybinder.c:init_object:455)
> > > > > -   Couldn't bind '<Super>L' (Log out: Lock the screen)
> > > > > -  This shortkey is probably already used by another applet or
> > another
> > > > application
> > > > > - GldiShortkey '<Control>F12' failed!
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-3.3.2/src/gldit/cairo-dock-keybinder.c:init_object:455)
> > > > > -   Couldn't bind '<Control>F12' (Log out: Show the logout menu)
> > > > > -  This shortkey is probably already used by another applet or
> > another
> > > > application
> > > > > - GldiShortkey '<Control>F10' failed!
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-3.3.2/src/gldit/cairo-dock-keybinder.c:init_object:455)
> > > > > -   Couldn't bind '<Control>F10' (Recent-Events: Show/hide the Recent
> > > > Events)
> > > > > -  This shortkey is probably already used by another applet or
> > another
> > > > application
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-plug-ins-3.3.2/Indicator-applet3/indicator-applet3.c:cd_indicator3_load:71)
> > > > > -   could not load indicator from 'com.canonical.indicator.sound': No
> > > > such file or directory
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-plug-ins-3.3.2/Indicator-applet3/indicator-applet3.c:cd_indicator3_load:81)
> > > > > -   Unable to load com.canonical.indicator.sound
> > > > > - GldiShortkey '<Control>F3' failed!
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-3.3.2/src/gldit/cairo-dock-keybinder.c:init_object:455)
> > > > > -   Couldn't bind '<Control>F3' (Sound Control: Show/hide the Sound
> > > menu)
> > > > > -  This shortkey is probably already used by another applet or
> > another
> > > > application
> > > > > - GldiShortkey 'Print' failed!
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-3.3.2/src/gldit/cairo-dock-keybinder.c:init_object:455)
> > > > > -   Couldn't bind 'Print' (Screenshot: Take a screenshot)
> > > > > -  This shortkey is probably already used by another applet or
> > another
> > > > application
> > > > > - Cairo-Dock - Launcher API Daemon is already running (2226)
> > > > > - GldiShortkey '<Control>F1' failed!
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-3.3.2/src/gldit/cairo-dock-keybinder.c:init_object:455)
> > > > > -   Couldn't bind '<Control>F1' (Applications Menu: Show/hide the
> > > > Applications menu)
> > > > > -  This shortkey is probably already used by another applet or
> > another
> > > > application
> > > > > - GldiShortkey '<Control>F2' failed!
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-3.3.2/src/gldit/cairo-dock-keybinder.c:init_object:455)
> > > > > -   Couldn't bind '<Control>F2' (Applications Menu: Show/hide the
> > > > quick-launch dialogue)
> > > > > -  This shortkey is probably already used by another applet or
> > another
> > > > application
> > > > > - GldiShortkey '<Super>Return' failed!
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-3.3.2/src/gldit/cairo-dock-keybinder.c:init_object:455)
> > > > > -   Couldn't bind '<Super>Return' (Control from keyboard:
> > > Enable/disable
> > > > the keyboard control of the dock)
> > > > > -  This shortkey is probably already used by another applet or
> > another
> > > > application
> > > > > - GldiShortkey '<Shift><Ctrl>F4' failed!
> > > > > - warning :
> > > >
> > >
> >  (/build/buildd/cairo-dock-3.3.2/src/gldit/cairo-dock-keybinder.c:init_object:455)
> > > > > -   Couldn't bind '<Shift><Ctrl>F4' (Show Desktop: Expose all the
> > > > desktops)
> > > > > -  This shortkey is probably already used by another applet or
> > another
> > > > application
> > > > > - _cd_find_volume_name_from_drive_name: assertion 'pDrive != NULL'
> > > failed
> > > > > - _cd_find_volume_name_from_drive_name: assertion 'pDrive != NULL'
> > > failed
> > > > > - _cd_find_volume_name_from_drive_name: assertion 'pDrive != NULL'
> > > failed
> > > > >
> > > >
> > > >
> > > >
> > > > ** Bug watch added: freedesktop.org Bugzilla #55036
> > > >    https://bugs.freedesktop.org/show_bug.cgi?id=55036
> > > >
> > > > --
> > > > You received this bug notification because you are a member of Cairo-
> > > > Dock Devs, which is subscribed to Cairo-Dock Core.
> > > > https://bugs.launchpad.net/bugs/1302317
> > > >
> > > > Title:
> > > >   new launcher disappears after reboot
> > > >
> > > > Status in Cairo-Dock : Core:
> > > >   Incomplete
> > > >
> > > > Bug description:
> > > >   cairo dock version: 3.3.2
> > > >   distro: linux  mint petra
> > > >   desktop env: Cinnamon
> > > >   windowmanager: Mutter (Muffin)
> > > >   used with: openGl
> > > >   graphics card: VGA compatible controller: Intel Corporation 3rd Gen
> > > Core
> > > > processor Graphics Controller (rev 09)
> > > >
> > > >   Bug description:
> > > >
> > > >   I launch Firefox and immediately turn it into a launcher.
> > > >   Checking at .config/cairo-dock/current_theme/launchers does show the
> > > > 01firefox.destkop file
> > > >
> > > >   Everything functioning allright
> > > >
> > > >   After reboot the launcher is gone and so is the 01firefox.desktop
> > file
> > > >
> > > > To manage notifications about this bug go to:
> > > > https://bugs.launchpad.net/cairo-dock-core/+bug/1302317/+subscriptions
> > > >
> > > > _______________________________________________
> > > > Mailing list: https://launchpad.net/~cairo-dock-team
> > > > Post to     : <email address hidden>
> > > > Unsubscribe : https://launchpad.net/~cairo-dock-team
> > > > More help   : https://help.launchpad.net/ListHelp
> > > >
> > >
> > >
> > > ** Bug watch added: freedesktop.org Bugzilla #55036
> > >    https://bugs.freedesktop.org/show_bug.cgi?id=55036
> > >
> > > --
> > > You received this bug notification because you are subscribed to the bug
> > > report.
> > > https://bugs.launchpad.net/bugs/1302317
> > >
> > > Title:
> > >   new launcher disappears after reboot
> > >
> > > Status in Cairo-Dock : Core:
> > >   Incomplete
> > >
> > > Bug description:
> > >   cairo dock version: 3.3.2
> > >   distro: linux  mint petra
> > >   desktop env: Cinnamon
> > >   windowmanager: Mutter (Muffin)
> > >   used with: openGl
> > >   graphics card: VGA compatible controller: Intel Corporation 3rd Gen
> > Core
> > > processor Graphics Controller (rev 09)
> > >
> > >   Bug description:
> > >
> > >   I launch Firefox and immediately turn it into a launcher.
> > >   Checking at .config/cairo-dock/current_theme/launchers does show the
> > > 01firefox.destkop file
> > >
> > >   Everything functioning allright
> > >
> > >   After reboot the launcher is gone and so is the 01firefox.desktop file
> > >
> > > To manage notifications about this bug go to:
> > > https://bugs.launchpad.net/cairo-dock-core/+bug/1302317/+subscriptions
> > >
> >
> > --
> > You received this bug notification because you are a member of Cairo-
> > Dock Devs, which is subscribed to Cairo-Dock Core.
> > https://bugs.launchpad.net/bugs/1302317
> >
> > Title:
> >   new launcher disappears after reboot
> >
> > Status in Cairo-Dock : Core:
> >   Incomplete
> >
> > Bug description:
> >   cairo dock version: 3.3.2
> >   distro: linux  mint petra
> >   desktop env: Cinnamon
> >   windowmanager: Mutter (Muffin)
> >   used with: openGl
> >   graphics card: VGA compatible controller: Intel Corporation 3rd Gen Core
> > processor Graphics Controller (rev 09)
> >
> >   Bug description:
> >
> >   I launch Firefox and immediately turn it into a launcher.
> >   Checking at .config/cairo-dock/current_theme/launchers does show the
> > 01firefox.destkop file
> >
> >   Everything functioning allright
> >
> >   After reboot the launcher is gone and so is the 01firefox.desktop file
> >
> > To manage notifications about this bug go to:
> > https://bugs.launchpad.net/cairo-dock-core/+bug/1302317/+subscriptions
> >
> > _______________________________________________
> > Mailing list: https://launchpad.net/~cairo-dock-team
> > Post to     : <email address hidden>
> > Unsubscribe : https://launchpad.net/~cairo-dock-team
> > More help   : https://help.launchpad.net/ListHelp
> >
>