Bug#858096: [mate-panel?] Mate panel unstable, notification area icons disappear without warning

[michael (C0bb3r)]

On 19/03/17 09:43, John Paul Adrian Glaubitz wrote:
> Hello!
>
> On 03/18/2017 11:07 PM, michael (C0bb3r) wrote:
>> Thanks for your assistance. The .xsession-errors, syslog, and  dmesg files are attached. Also attached are a couple of screenshots showing what I mean.
> Attaching large files to bug reports should be avoided. It would have been better to upload
> the screenshots to a webspace. And screenshots should also be sent on request only as they
> aren't really necessary in most cases. But, oh well.
>
> Anyway, from your .xsession-errors there seem to be two warnings which could be related to
> your problem:
>
> (mate-panel:1286): Gtk-WARNING **: Negative content width -3 (allocation 15, extents 9x9) while allocating gadget (node button, owner PanelActionButton)
> (mate-panel:1286): Gtk-WARNING **: Allocating size to GtkAlignment 0x55cfb821bdf0 without calling gtk_widget_get_preferred_width/height(). How does the code
> know the size to allocate?
>
> Other than that, there are also lots of theme-related warnings and since you have such a
> fancy theme, I'd try resetting the theme as first attempt. If that doesn't help, we need
> to investigate the two warnings above.
>
> Adrian
>
Sorry for not getting back sooner we've had atrocious weather and it 
knocked out my net connection. Anyway I have, as promised, tested the 
other themes and both BlackMate and Traditional OK lose the notification 
icons as well but they are much more stable than the other themes. At 
the moment Blackmate seems to be the most stable.

Any info on what those warnings mean?

Cheers.
Michael.