Judicieuse remarque david37. Merci.
Voilà, j'ai rectifié le tir et fait un nouveau post.
J'ai réédité le déroulement du démarrage avec inxi. Je vous en communique une copie partielle des passages qui me semblent bizarres. Si ça peut aider ! Ça n'a peut être aucune importance, mais il n'y a que vous qui pouvez juger.
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[ 1.393558] powernow_k8: [Firmware Bug]: No compatible ACPI _PSS objects found.
[Firmware Bug]: First, make sure Cool'N'Quiet is enabled in the BIOS.
[Firmware Bug]: If that doesn't help, try upgrading your BIOS.[/color]
[ 4.166189] EDID block is all zeroes
[ 4.166194] nouveau 0000:02:00.0: DVI-I-2: EDID block 0 invalid.
[ 4.166197] nouveau 0000:02:00.0: DRM: DDC responded, but no EDID for DVI-I-2
[ 17.544446] blk_update_request: I/O error, dev fd0, sector 0
[ 17.544452] floppy: error -5 while reading block 0
[ 24.642744] EDAC amd64: DRAM ECC disabled.
[ 24.642750] EDAC amd64: ECC disabled in the BIOS or no ECC capability, module will not load.
Either enable ECC checking or force module loading by setting 'ecc_enable_override'.
(Note that use of the override may cause unknown side effects.)
[ 24.832449] kvm: Nested Virtualization enabled
[ 113.689749] cgroup: new mount options do not match the existing superblock, will be ignored
[ 114.319775] IPv6: ADDRCONF(NETDEV_UP): enp0s7: link is not ready
[ 114.320343] forcedeth 0000:00:07.0 enp0s7: MSI enabled
[ 114.336182] nouveau 0000:02:00.0: DRM: DDC responded, but no EDID for DVI-I-2
[ 114.682172] nouveau 0000:02:00.0: DRM: DDC responded, but no EDID for DVI-I-2
[ 114.797803] nouveau 0000:02:00.0: DRM: DDC responded, but no EDID for DVI-I-2
[ 128.243479] nouveau 0000:02:00.0: DRM: DDC responded, but no EDID for DVI-I-2
[ 129.462116] nouveau 0000:02:00.0: DRM: DDC responded, but no EDID for DVI-I-2
[ 129.763325] nouveau 0000:02:00.0: DRM: DDC responded, but no EDID for DVI-I-2
[ 129.918095] nouveau 0000:02:00.0: DRM: DDC responded, but no EDID for DVI-I-2
[ 150.951490] nouveau 0000:02:00.0: DRM: DDC responded, but no EDID for DVI-I-2
[ 1916.607413] SGI XFS with ACLs, security attributes, realtime, no debug enabled
[ 1916.628240] JFS: nTxBlock = 8192, nTxLock = 65536
[ 1916.650430] ntfs: driver 2.1.32 [Flags: R/O MODULE].
[ 1916.687643] QNX4 filesystem 0.2.3 registered.
[ 3007.866673] nouveau 0000:02:00.0: DRM: DDC responded, but no EDID for DVI-I-2
[ 3398.655101] systemd[1]: apt-daily.timer: Adding 5h 17min 18.562597s random time.
[ 3411.400551] blk_update_request: I/O error, dev fd0, sector 0
[ 3411.400558] floppy: error -5 while reading block 0
[ 3412.024080] sdb: sdb1
[ 3412.030211] sdh: sdh1
[ 3561.292966] systemd[1]: apt-daily.timer: Adding 2h 26min 9.045593s random time.
paco@Petit-noir-costaud-64X2 ~ $
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paco@Petit-noir-costaud-64X2 ~ $ systemd-analyze
Startup finished in 23.216s (kernel) + 3min 537ms (userspace) = 3min 23.753s
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paco@Petit-noir-costaud-64X2 ~ $ systemd-analyze blame
1.228s dev-sdc1.device
724ms lvm2-monitor.service
658ms accounts-daemon.service
536ms systemd-logind.service
451ms NetworkManager.service
435ms avahi-daemon.service
346ms loadcpufreq.service
315ms grub-common.service
303ms ondemand.service
297ms udisks2.service
283ms virtualbox-guest-utils.service
274ms speech-dispatcher.service
265ms hddtemp.service
263ms irqbalance.service
252ms lm-sensors.service
241ms console-kit-log-system-start.service
212ms upower.service
171ms systemd-modules-load.service
163ms plymouth-quit-wait.service
161ms console-setup.service
154ms plymouth-quit.service
153ms binfmt-support.service
147ms systemd-user-sessions.service
140ms alsa-restore.service
136ms systemd-journald.service
132ms networking.service
127ms systemd-udev-trigger.service
111ms colord.service
104ms keyboard-setup.service
102ms pppd-dns.service
97ms cpufrequtils.service
96ms thermald.service
88ms systemd-update-utmp-runlevel.service
84ms gpu-manager.service
83ms rsyslog.service
80ms polkitd.service
73ms user@1000.service
69ms systemd-update-utmp.service
61ms systemd-hostnamed.service
60ms systemd-journal-flush.service
49ms ufw.service
45ms kmod-static-nodes.service
45ms systemd-udevd.service
45ms ntp.service
43ms sys-kernel-debug.mount
40ms dev-mqueue.mount
35ms dev-hugepages.mount
34ms rc-local.service
32ms openvpn.service
28ms dns-clean.service
27ms systemd-tmpfiles-setup-dev.service
27ms setvtrgb.service
25ms proc-sys-fs-binfmt_misc.mount
25ms systemd-tmpfiles-setup.service
24ms resolvconf.service
23ms plymouth-read-write.service
23ms plymouth-start.service
19ms console-kit-daemon.service
14ms systemd-tmpfiles-clean.service
13ms systemd-sysctl.service
11ms systemd-random-seed.service
11ms systemd-remount-fs.service
7ms ureadahead-stop.service
5ms rtkit-daemon.service
4ms sys-fs-fuse-connections.mount
lines 3-65/65 (END)
Pas de configuration particulière pour le moment.
Ordinateur provisoire. En attente de conseils pour nouvelle config.