Ubuntu 16.04 repentinamente se desliga depois de desconectar o carregador

Question

Eu tenho um Dell Inspiron 7560 que eu comprei recentemente. Eu tenho dual-boot do Windows e Ubuntu Mate 16.04 nele.

O Ubuntu repentinamente desliga após alguns segundos desconectando o carregador (isso não ocorre em nenhum outro momento). O laptop é novo e a bateria também, então não vejo nenhum motivo para essa ocorrência.

Aqui está a saída de grep -i temp /var/log/syslog* para ajuda.

/var/log/syslog:Jul 12 02:59:14 ubuntu systemd[1]: Starting Cleanup of Temporary Directories...
/var/log/syslog:Jul 12 02:59:15 ubuntu systemd[1]: Started Cleanup of Temporary Directories.
/var/log/syslog:Jul 13 00:38:51 ubuntu systemd[1]: Started Daily Cleanup of Temporary Directories.
/var/log/syslog:Jul 13 00:38:53 ubuntu sensors[971]: coretemp-isa-0000
/var/log/syslog:Jul 13 00:38:53 ubuntu sensors[971]: temp1:        +25.0°C  (crit = +107.0°C)
/var/log/syslog:Jul 13 00:38:53 ubuntu sensors[971]: temp1:        +36.5°C
/var/log/syslog:Jul 13 00:39:08 ubuntu systemd[1]: Starting LSB: disk temperature monitoring daemon...
/var/log/syslog:Jul 13 00:39:08 ubuntu systemd[1]: Started LSB: disk temperature monitoring daemon.
/var/log/syslog.1:Jul 10 00:56:47 ubuntu systemd[1]: Starting Cleanup of Temporary Directories...
/var/log/syslog.1:Jul 10 00:56:47 ubuntu systemd[1]: Started Cleanup of Temporary Directories.
/var/log/syslog.1:Jul 10 01:08:01 ubuntu systemd[1]: Started Daily Cleanup of Temporary Directories.
/var/log/syslog.1:Jul 10 01:08:10 ubuntu systemd[1]: Starting LSB: disk temperature monitoring daemon...
/var/log/syslog.1:Jul 10 01:08:11 ubuntu systemd[1]: Started LSB: disk temperature monitoring daemon.
/var/log/syslog.1:Jul 10 01:08:14 ubuntu ntpd[1060]: error resolving pool 0.ubuntu.pool.ntp.org: Temporary failure in name resolution (-3)
/var/log/syslog.1:Jul 10 01:08:15 ubuntu ntpd[1060]: error resolving pool 1.ubuntu.pool.ntp.org: Temporary failure in name resolution (-3)
/var/log/syslog.1:Jul 10 01:08:16 ubuntu ntpd[1060]: error resolving pool 2.ubuntu.pool.ntp.org: Temporary failure in name resolution (-3)
/var/log/syslog.1:Jul 10 01:08:17 ubuntu ntpd[1060]: error resolving pool 3.ubuntu.pool.ntp.org: Temporary failure in name resolution (-3)
/var/log/syslog.1:Jul 10 01:08:18 ubuntu ntpd[1060]: error resolving pool ntp.ubuntu.com: Temporary failure in name resolution (-3)
/var/log/syslog.1:Jul 10 01:16:40 ubuntu systemd[1]: Stopped Daily Cleanup of Temporary Directories.
/var/log/syslog.1:Jul 10 01:17:45 ubuntu systemd[1]: Started Daily Cleanup of Temporary Directories.
/var/log/syslog.1:Jul 10 01:18:00 ubuntu systemd[1]: Starting LSB: disk temperature monitoring daemon...
/var/log/syslog.1:Jul 10 01:18:00 ubuntu systemd[1]: Started LSB: disk temperature monitoring daemon.
/var/log/syslog.1:Jul 10 01:28:40 ubuntu systemd[1]: Stopped Daily Cleanup of Temporary Directories.
/var/log/syslog.1:Jul 10 01:29:34 ubuntu systemd[1]: Started Daily Cleanup of Temporary Directories.
/var/log/syslog.1:Jul 10 01:29:34 ubuntu sensors[929]: coretemp-isa-0000
/var/log/syslog.1:Jul 10 01:29:34 ubuntu sensors[929]: temp1:        +25.0°C  (crit = +107.0°C)
/var/log/syslog.1:Jul 10 01:29:34 ubuntu sensors[929]: temp1:        +45.0°C
/var/log/syslog.1:Jul 10 01:29:45 ubuntu systemd[1]: Starting LSB: disk temperature monitoring daemon...
/var/log/syslog.1:Jul 10 01:29:46 ubuntu systemd[1]: Started LSB: disk temperature monitoring daemon.
/var/log/syslog.1:Jul 10 01:43:03 ubuntu systemd[1]: Stopped Daily Cleanup of Temporary Directories.
/var/log/syslog.1:Jul 10 09:57:58 ubuntu systemd[1]: Started Daily Cleanup of Temporary Directories.
/var/log/syslog.1:Jul 10 09:57:58 ubuntu sensors[934]: coretemp-isa-0000
/var/log/syslog.1:Jul 10 09:57:58 ubuntu sensors[934]: temp1:        +25.0°C  (crit = +107.0°C)
/var/log/syslog.1:Jul 10 09:57:58 ubuntu sensors[934]: temp1:        +35.0°C
/var/log/syslog.1:Jul 10 09:58:12 ubuntu systemd[1]: Starting LSB: disk temperature monitoring daemon...
/var/log/syslog.1:Jul 10 09:58:12 ubuntu systemd[1]: Started LSB: disk temperature monitoring daemon.
/var/log/syslog.1:Jul 10 10:12:34 ubuntu systemd[1]: Starting Cleanup of Temporary Directories...
/var/log/syslog.1:Jul 10 10:12:34 ubuntu systemd[1]: Started Cleanup of Temporary Directories.
/var/log/syslog.1:Jul 12 08:14:16 ubuntu systemd[1]: Started Daily Cleanup of Temporary Directories.
/var/log/syslog.1:Jul 12 08:14:18 ubuntu sensors[985]: coretemp-isa-0000
/var/log/syslog.1:Jul 12 08:14:18 ubuntu sensors[985]: temp1:        +25.0°C  (crit = +107.0°C)
/var/log/syslog.1:Jul 12 08:14:18 ubuntu sensors[985]: temp1:        +34.5°C
/var/log/syslog.1:Jul 12 08:14:32 ubuntu systemd[1]: Starting LSB: disk temperature monitoring daemon...
/var/log/syslog.1:Jul 12 08:14:33 ubuntu systemd[1]: Started LSB: disk temperature monitoring daemon.

    

Answer 1

Eu tenho (pelo menos por enquanto) conseguido resolver o problema.

O problema, tanto quanto pude constatar, veio do Ubuntu usando a GPU Intel Integrada em vez da Nvidia.

Depois de limpar meu disco rígido e reinstalar o Ubuntu, instalei os drivers proprietários da Nvidia e, em Nvidia X Settings/PRIME Profiles , mudei para a GPU da Nvidia. O problema não ocorre mais (volta a mudar para a Intel).

ATUALIZAÇÃO: Aparentemente, o problema não foi resolvido. Ele ainda está sendo desligado e agora mesmo quando não conectei ou desconectei nada.