The fix is rather easy: just replace $cmd .= " -extension XFIXES"; by #$cmd .= " -extension XFIXES"; around line 263 in /usr/bin/vnc4server
The fix is rather easy: just replace
$cmd .= " -extension XFIXES";
by
#$cmd .= " -extension XFIXES";
around line 263 in /usr/bin/vnc4server