[Bug 237334] LXDE: lxsession never sent data to screen

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237334

            Bug ID: 237334
           Summary: LXDE: lxsession never sent data to screen
           Product: Ports & Packages
           Version: Latest
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs at FreeBSD.org
          Reporter: bortzy at riseup.net

After ugrading my packages, I can't start a lxsession anymore.

FreeBSD version: 12.0-RELEASE-p3
lxsession: 0.5.4

The process doesn't crash and is still running but do nothing.
A truss reports regulary:
recvmsg(11,0x7fffffffe728,0)    ERR#35 'Resource temporarily unavailable'

I find a workaround to start the lxsession:

1 - open a text console (ctrl+F1)
2 - 
export DISPLAY=:0.0
export LANG=fr_FR.UTF-8   
xvinfo

xvinfo is very very long and finish with:
X-Video Extension version 2.2
screen #0
 no adaptors present

now, the initial lxsession is visible but, sometimes with no running desktop
(pcmanfm), sometimes with no title bar and no minimize/maximize/close button,
sometimes with no mouse pointer, sometimes everything is fine.

Starting manually a lxsession with
/usr/local/bin/lxsession -s LXDE -e LXDE
always works and is complete (pcmanfm is running, title bar is completed).

After the workaround, everything works a usally and perfectly.

My display manager is slim and is started with /etc/rc.conf
Trying to use xdm and the issue is the same.


It seems lxsession is waiting for something that is unblocked by xvinfo.

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