boot errors messages (fedora 24)

[François Patte]

Bonjour,

with journalctl -b command, I get these error messages (in bold red color):

<---------------------
systemd-tty-ask-password-agent[583]: Failed to send: No such file or
directory

systemd-tty-ask-password-agent[583]: Failed to show password: No such
file or directory

nouveau 0000:01:00.0: disp: outp 02:0006:0342: no bios dp data

nouveau 0000:01:00.0: disp: outp 04:0006:0344: no bios dp data

systemd-udevd[961]: Error calling EVIOCSKEYCODE on device node
'/dev/input/event15' (scan code 0x150,

avahi-daemon[1342]: chroot.c: open() failed: No such file or directory

/firewalld[1325]: ERROR: Failed to flush eb firewall:
'/usr/sbin/ebtables-restore --noflush' failed:

/firewalld[1325]: ERROR: INVALID_ZONE x2

spice-vdagent[1791]: Cannot access vdagent virtio channel
/dev/virtio-ports/com.redhat.spice.0

pulseaudio[2199]: [pulseaudio] bluez5-util.c: GetManagedObjects()
failed: org.freedesktop.DBus.Error.
<--------------------------------------

And in bold white color:

<-----------------------------
nouveau 0000:01:00.0: bios: M0203T not found

nouveau 0000:01:00.0: bios: M0203E not matched!

avahi-daemon[1312]: Failed to open /etc/resolv.conf: Invalid argument
<-------------------------------

What do they mean and how to crrect this.

Thank you.

-- 
François Patte
UFR de mathématiques et informatique
Laboratoire CNRS MAP5, UMR 8145
Université Paris Descartes
45, rue des Saints Pères
F-75270 Paris Cedex 06
Tél. [phone]
http://www.math-info.univ-paris5.fr/~patte