Às vezes, quando eu alterno TTYs (também durante a alternância entre usuários conectados) ou depois que a tela escurece e desliga, minha tela fica / permanece no modo de espera e não é mais ativada. Na verdade, todo o sistema trava então porque ele não reage mais a nada (pressionar, por exemplo, Shift ou NUM-Lock não alterna os LEDs,).
A única coisa que ainda funciona são os comandos mágicos Alt + SysRq que eu uso para reiniciar a máquina ("R-E-I-S-U-B").
Eu suspeito de um problema com minha antiga placa de vídeo AMD. Ele também está desligando e ligando a tela rapidamente, como se fosse alterar a resolução em várias ocasiões, como abrir a janela Configurações do Sistema, etc. Talvez o suporte a hardware desse modelo tenha sido removido (acidentalmente) desde 16.04, porque antes da atualização em 15.10 sem essas falhas. As falsas mudanças de resolução estavam presentes naquela época também. Usando o desktop Unity do Ubuntu 16.04 de 64 bits agora.
Meus gráficos:
$ inxi -G
Graphics: Card: Advanced Micro Devices [AMD/ATI] RV535 [Radeon X1650 PRO]
Display Server: X.Org 1.18.3 drivers: ati,radeon (unloaded: fbdev,vesa) Resolution: [email protected]
GLX Renderer: Gallium 0.4 on ATI RV530 GLX Version: 2.1 Mesa 11.2.0
Trecho de syslog em torno do último travamento (causado por TTS alternando entre dois usuários conectados) e antes de reinicializar o sistema com o REISUB:
Jul 4 18:52:18 wolf-pack gnome-session[2706]: gnome-session-binary[2706]: GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Jul 4 18:52:18 wolf-pack gnome-session[2706]: message repeated 4 times: [ gnome-session-binary[2706]: GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed]
Jul 4 18:52:18 wolf-pack gnome-session-binary[2706]: GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Jul 4 18:52:18 wolf-pack gnome-session-binary[2706]: message repeated 4 times: [ GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed]
Jul 4 18:52:18 wolf-pack gnome-session[2706]: gnome-session-binary[2706]: GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Jul 4 18:52:18 wolf-pack gnome-session-binary[2706]: GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Jul 4 18:52:20 wolf-pack gnome-session[2706]: (deja-dup-monitor:5126): GVFS-RemoteVolumeMonitor-WARNING **: Owner of volume monitor org.gtk.vfs.GPhoto2VolumeMonitor disconnected from the bus; removing drives/volumes/mounts
Jul 4 18:52:20 wolf-pack org.gnome.zeitgeist.SimpleIndexer[2570]: (zeitgeist-fts:3365): GLib-GIO-WARNING **: Error releasing name org.gnome.zeitgeist.SimpleIndexer: The connection is closed
Jul 4 18:52:20 wolf-pack org.gnome.zeitgeist.SimpleIndexer[2570]: ** (zeitgeist-fts:3365): WARNING **: zeitgeist-fts.vala:252: The connection is closed
Jul 4 18:52:20 wolf-pack org.gnome.zeitgeist.Engine[2570]: (zeitgeist-daemon:3358): GLib-GIO-WARNING **: Error releasing name org.gnome.zeitgeist.Engine: The connection is closed
Jul 4 18:52:20 wolf-pack org.gnome.zeitgeist.Engine[2570]: #033[31m[16:52:20.036353 WARNING]#033[0m zeitgeist-daemon.vala:449: The connection is closed
Jul 4 18:52:20 wolf-pack gnome-session[2706]: (unity-fallback-mount-helper:2853): GVFS-RemoteVolumeMonitor-WARNING **: Owner of volume monitor org.gtk.vfs.GPhoto2VolumeMonitor disconnected from the bus; removing drives/volumes/mounts
Jul 4 18:52:20 wolf-pack gnome-session[2706]: (deja-dup-monitor:5126): GVFS-RemoteVolumeMonitor-WARNING **: Owner of volume monitor org.gtk.vfs.UDisks2VolumeMonitor disconnected from the bus; removing drives/volumes/mounts
Jul 4 18:52:20 wolf-pack gnome-session[2706]: (deja-dup-monitor:5126): GVFS-RemoteVolumeMonitor-WARNING **: Owner of volume monitor org.gtk.vfs.GoaVolumeMonitor disconnected from the bus; removing drives/volumes/mounts
Jul 4 18:52:20 wolf-pack gnome-session[2706]: (deja-dup-monitor:5126): GVFS-RemoteVolumeMonitor-WARNING **: Owner of volume monitor org.gtk.vfs.MTPVolumeMonitor disconnected from the bus; removing drives/volumes/mounts
Jul 4 18:52:20 wolf-pack gnome-session[2706]: (deja-dup-monitor:5126): GVFS-RemoteVolumeMonitor-WARNING **: Owner of volume monitor org.gtk.vfs.AfcVolumeMonitor disconnected from the bus; removing drives/volumes/mounts
Jul 4 18:52:20 wolf-pack gnome-session[2706]: ** (zeitgeist-datahub:3347): WARNING **: zeitgeist-datahub.vala:229: Unable to get name "org.gnome.zeitgeist.datahub" on the bus!
Jul 4 18:52:24 wolf-pack systemd[1]: Created slice User Slice of lightdm.
Jul 4 18:52:24 wolf-pack systemd[1]: Starting User Manager for UID 119...
Jul 4 18:52:24 wolf-pack systemd[1]: Started Session c5 of user lightdm.
Jul 4 18:52:24 wolf-pack systemd[16791]: Reached target Paths.
Jul 4 18:52:24 wolf-pack systemd[16791]: Reached target Timers.
Jul 4 18:52:24 wolf-pack systemd[16791]: Reached target Sockets.
Jul 4 18:52:24 wolf-pack systemd[16791]: Reached target Basic System.
Jul 4 18:52:24 wolf-pack systemd[16791]: Reached target Default.
Jul 4 18:52:24 wolf-pack systemd[16791]: Startup finished in 127ms.
Jul 4 18:52:24 wolf-pack systemd[1]: Started User Manager for UID 119.
Jul 4 18:52:25 wolf-pack org.a11y.atspi.Registry[16813]: SpiRegistry daemon is running with well-known name - org.a11y.atspi.Registry
Jul 4 18:52:27 wolf-pack dbus[689]: [system] Activating via systemd: service name='org.bluez' unit='dbus-org.bluez.service'
Jul 4 18:52:28 wolf-pack rtkit-daemon[1829]: Successfully made thread 16859 of process 16859 (n/a) owned by '119' high priority at nice level -11.
Jul 4 18:52:28 wolf-pack rtkit-daemon[1829]: Supervising 7 threads of 3 processes of 3 users.
Jul 4 18:52:29 wolf-pack rtkit-daemon[1829]: Successfully made thread 16926 of process 16926 (n/a) owned by '119' high priority at nice level -11.
Jul 4 18:52:29 wolf-pack rtkit-daemon[1829]: Supervising 8 threads of 4 processes of 3 users.
Jul 4 18:52:29 wolf-pack pulseaudio[16926]: [pulseaudio] pid.c: Daemon already running.
Jul 4 18:52:42 wolf-pack systemd[1]: Stopping User Manager for UID 1000...
Jul 4 18:52:42 wolf-pack systemd[1923]: Reached target Shutdown.
Jul 4 18:52:42 wolf-pack systemd[1923]: Starting Exit the Session...
Jul 4 18:52:42 wolf-pack systemd[1923]: Stopped target Default.
Jul 4 18:52:42 wolf-pack systemd[1923]: Stopped target Basic System.
Jul 4 18:52:42 wolf-pack systemd[1923]: Stopped target Timers.
Jul 4 18:52:42 wolf-pack systemd[1923]: Stopped target Sockets.
Jul 4 18:52:42 wolf-pack systemd[1923]: Stopped target Paths.
Jul 4 18:52:42 wolf-pack systemd[1923]: Received SIGRTMIN+24 from PID 17186 (kill).
Jul 4 18:52:42 wolf-pack systemd[1]: Stopped User Manager for UID 1000.
Jul 4 18:52:42 wolf-pack systemd[1]: Removed slice User Slice of alphawolf.
Jul 4 18:52:52 wolf-pack pulseaudio[16859]: [pulseaudio] bluez5-util.c: GetManagedObjects() failed: org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'org.bluez': timed out
Jul 4 18:52:58 wolf-pack kernel: [ 2853.412116] sysrq: SysRq : This sysrq operation is disabled.
Jul 4 18:52:59 wolf-pack kernel: [ 2854.461708] sysrq: SysRq : This sysrq operation is disabled.
Jul 4 18:53:01 wolf-pack kernel: [ 2855.916207] sysrq: SysRq : This sysrq operation is disabled.
Jul 4 18:53:03 wolf-pack kernel: [ 2858.442002] sysrq: SysRq : Emergency Sync
Jul 4 18:53:03 wolf-pack kernel: [ 2858.457544] Emergency Sync complete
Jul 4 18:53:07 wolf-pack kernel: [ 2862.284760] sysrq: SysRq : Emergency Remount R/O
Jul 4 18:54:05 wolf-pack rsyslogd: [origin software="rsyslogd" swVersion="8.16.0" x-pid="750" x-info="http://www.rsyslog.com"] start
Por favor, me diga quais informações adicionais e registros você precisa.
Qual é a causa dessas falhas e como posso evitá-las?
Já desabilitei a desativação da tela após inatividade, mas não posso deixar de trocar os TTYs de vez em quando.
Eu entrei neste site para ver se conseguia encontrar uma resposta para um problema muito semelhante. Eu não encontrei uma resposta exata, no entanto, o seu post e outros me fizeram mudar minha placa de vídeo. Drivers foi (com a mudança de hardware) de um ATI r5480 (com o problema) para NV43 (para problema resolvido).
Estou executando o desktop 16.04.1 LTS