I run XFCE via .xsession and startx.
After upgrading from 4.10.1-9 to 4.10.1-10 (I think), along with other
updates in sid, when I run 'startx' I am presented with a mostly black
screen.  I have the menu bar at the top and the launcher buttons at
the bottom of the screen, as well as any saved windows that were restarted.
The wallpaper is not rendered until I refresh the display, for example
by moving a window in front of it.  Doing so leaves the wallpaper visible
in the portions of the screen that were once covered by the window being
moved.

The icons which are on the desktop are not rendered; that part of the screen
is also black.

This is not a particular usability issue, but I figured I would report
my experience just in case.

There appears to be something on a timeout (perhaps a minute or two in
length) that eventually causes the entire screen to be refreshed, or
at least it makes the black parts of the screen that should be
wallpaper/desktop get rendered properly.

control: tag -1 unreproducible moreinfo

That doesn't look at all related to xfce4-session. The desktop is
supposedly rendered by xfdesktop4, so you might want to investigate
there, but without knowing what actually changed during that update,
it's impossible to investigate.

Also, xfce4-session 4.10.1-10 is in sid since Jan 11 and testing since
Jan 17 so either your don't upgrade regularly, or it's something else.

Regards,

Thanks.  I rather suspect that this will get closed due to lack of energy
on my part, but we'll see...

Thank you for the pointer; I'm sorry I guessed wrong.  (Would reporting
against the xfce4 metapackage have been a better or worse idea, for future
reference?)

Now that you mention it, I bet I did not actually restart X on the
preceding several updates, so the listed versions are unlikely to be the
relevant ones.

I will see if I can dig up some useful information, but feel free to close
in a few weeks if nothing shows up.