salve
come da titolo ho impostato l'autologin in lightdm. Il problema è lo schermo spento prima di avviare il desktop. Le lampade del monitor sono accese ma il desktop non si carica. Il desktop si carica muovendo il mouse molto forte.
Per ora sto provando a modificare grub: quiet splash acpi_osi=Linux acpi_backlight=vendor, ma per ora senza risultati.
Ho provato a sostituire lighdm com slim e altri, impostare l'autologin senza DM ma il problema rimane: il desktop si carica solo muovendo il mouse molto forte.
Non capisco se va in sospensione o ibernazione o semplicamente non carica il desktop.

per lightdm
[SeatDefaults]
autologin-user=graziella
autologin-user-timeout=0

aggiungo info:

dic 31 09:17:05 pc-graziella kernel: atkbd serio0: Failed to deactivate keyboard on isa0060/serio0
dic 31 09:17:06 pc-graziella [266]: Failed to wait spawned command '/usr/sbin/obex-check-device 1d6b 0002': Input/output error
dic 31 09:17:06 pc-graziella [273]: Failed to wait spawned command '/usr/sbin/obex-check-device 1d6b 0002': Input/output error
dic 31 09:17:06 pc-graziella [301]: Failed to wait spawned command '/usr/sbin/obex-check-device 8087 0020': Input/output error
dic 31 09:17:06 pc-graziella [270]: Failed to wait spawned command '/usr/sbin/obex-check-device 8087 0020': Input/output error
dic 31 09:17:06 pc-graziella [301]: Failed to wait spawned command '/usr/sbin/obex-check-device 13d3 5130': Input/output error
dic 31 09:17:06 pc-graziella [270]: Failed to wait spawned command '/usr/sbin/obex-check-device 046d c05f': Input/output error
dic 31 09:17:06 pc-graziella kernel: mei mei::55213584-9a29-4916-badf-0fb7ed682aeb:01: Could not read FW version
dic 31 09:17:06 pc-graziella kernel: mei mei::55213584-9a29-4916-badf-0fb7ed682aeb:01: FW version command failed -5
dic 31 09:17:06 pc-graziella [274]: Failed to wait spawned command '/usr/sbin/alsactl -E HOME=/run/alsa restore 1': Input/output error
dic 31 09:17:06 pc-graziella [284]: Failed to wait spawned command '/usr/sbin/alsactl -E HOME=/run/alsa restore 0': Input/output error
dic 31 09:17:08 pc-graziella systemd[1]: Failed to start Network Manager Wait Online.
dic 31 09:17:32 pc-graziella NetworkManager[542]: [1546244252.8379] sup-iface[0x55a21c6018d0,wls1]: error adding interface: È s
dic 31 09:18:09 pc-graziella kernel: mei mei::55213584-9a29-4916-badf-0fb7ed682aeb:01: Could not read FW version
dic 31 09:18:09 pc-graziella kernel: mei mei::55213584-9a29-4916-badf-0fb7ed682aeb:01: FW version command failed -5
dic 31 09:18:34 pc-graziella NetworkManager[542]: [1546244314.7376] sup-iface[0x55a21c601ae0,wls1]: error adding interface: È s
dic 31 09:22:12 pc-graziella anacron[553]: Can't find sendmail at /usr/sbin/sendmail, not mailing output

Dec 31 09:17:07 pc-graziella kernel: [ 2.044976] lpc_ich: Resource conflict(s) found affecting gpio_ich

graphical.target @3.542s
└─multi-user.target @3.539s
└─hddtemp.service @3.443s +85ms
└─network-online.target @3.434s
└─network.target @2.386s
└─NetworkManager.service @2.223s +161ms
└─dbus.service @2.213s
└─basic.target @2.189s
└─sockets.target @2.189s
└─cups.socket @2.189s
└─sysinit.target @2.186s
└─systemd-backlight@backlight:acpi_video0.service @3.485s +33ms
└─system-systemd\x2dbacklight.slice @3.474s
└─system.slice @664ms
└─-.slice @664ms

● lightdm.service - Light Display Manager
Loaded: loaded (/lib/systemd/system/lightdm.service; indirect; vendor preset: enabled)
Active: active (running) since Mon 2018-12-31 09:17:07 CET; 1h 9min ago
Docs: man:lightdm(1)
Process: 599 ExecStartPre=/bin/sh -c [ "$(cat /etc/X11/default-display-manager 2>/dev/null)" = "/usr/sbin/lightdm" ] (code=exited, st
Main PID: 603 (lightdm)
Tasks: 7 (limit: 4491)
Memory: 73.2M
CGroup: /system.slice/lightdm.service
├─603 /usr/sbin/lightdm
└─633 /usr/lib/xorg/Xorg :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch

Non saprei cosa aggiunge per dare più informazioni.

Grazie a tutti