My computer has recently unexpectedly shut down with no apparent reason. The last command shows that the system crashed, but I was unable to find any reason for that in the system logs:
last output:
reboot system boot 4.15.0-46-generi Thu Mar 28 10:02 - 10:22 (00:20)
username tty2 tty2 Thu Mar 28 08:39 - crash (01:22)
reboot system boot 4.15.0-46-generi Thu Mar 28 08:39 - 10:22 (01:42)
syslog:
Mar 28 09:53:11 U-C-001 gdm-session-worker[1589]: modprobe: ERROR: could not insert 'nvidia': Required key not available
Mar 28 09:53:11 U-C-001 kernel: [ 4453.744318] PKCS#7 signature not signed with a trusted key
Mar 28 09:53:14 U-C-001 gnome-software[2757]: no app for changed ubuntu-dock@ubuntu.com
Mar 28 09:53:14 U-C-001 gnome-software[2757]: no app for changed ubuntu-appindicators@ubuntu.com
Mar 28 09:53:14 U-C-001 gnome-shell[1675]: [AppIndicatorSupport-DEBUG] Registering StatusNotifierItem :1.75/org/ayatana/NotificationItem/software_update_available
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: /snap/firefox/198/bin/desktop-launch: line 174: /home/username/snap/firefox/common/.config/user-dirs.dirs: No such file or directory
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: cp: cannot create regular file '/home/username/snap/firefox/common/.config/': Not a directory
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: /snap/firefox/198/bin/desktop-launch: line 177: /home/username/snap/firefox/common/.config/user-dirs.dirs.md5sum: No such file or directory
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: /snap/firefox/198/bin/desktop-launch: line 177: /home/username/snap/firefox/common/.config/user-dirs.locale.md5sum: No such file or directory
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: Gtk-Message: Failed to load module "canberra-gtk-module"
Mar 28 09:53:16 U-C-001 kernel: [ 4458.808586] audit: type=1400 audit(1553763196.420:60): apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/proc/6462/net/arp" pid=6462 comm=4C696E6B204D6F6E69746F72 requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: Gtk-Message: Failed to load module "canberra-gtk-module"
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: (firefox:6462): Gtk-CRITICAL **: gtk_widget_get_style_context: assertion 'GTK_IS_WIDGET (widget)' failed
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: (firefox:6462): Gtk-CRITICAL **: gtk_style_context_get_state: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: (firefox:6462): Gtk-CRITICAL **: gtk_style_context_set_state: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: (firefox:6462): Gtk-CRITICAL **: gtk_render_background: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: (firefox:6462): Gtk-CRITICAL **: gtk_render_frame: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: Gtk-Message: Failed to load module "canberra-gtk-module"
Mar 28 09:53:16 U-C-001 firefox_firefox.desktop[6462]: Gtk-Message: Failed to load module "canberra-gtk-module"
Mar 28 09:53:17 U-C-001 gnome-shell[1675]: JS ERROR: Exception in callback for signal: activate: Error: Error invoking IBus.set_global_engine_async: Expected function for callback argument callback, got undefined#012setEngine@resource:///org/gnome/shell/misc/ibusManager.js:207:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012activateInputSource@resource:///org/gnome/shell/ui/status/keyboard.js:490:13#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_emit@resource:///org/gnome/gjs/modules/signals.js:128:27#012activate@resource:///org/gnome/shell/ui/status/keyboard.js:65:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_inputSourcesChanged@resource:///org/gnome/shell/ui/status/keyboard.js:620:13#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012reload@resource:///org/gnome/shell/ui/status/keyboard.js:369:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_ibusSetContentType@resource:///org/gnome/shell/ui/status/keyboard.js:691:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_emit@resource:///org/gnome/gjs/modules/signals.js:128:27#012_setContentType@resource:///org/gnome/shell/misc/ibusManager.js:183:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
Mar 28 09:53:17 U-C-001 firefox_firefox.desktop[6462]: Gtk-Message: Failed to load module "canberra-gtk-module"
Mar 28 09:53:18 U-C-001 firefox_firefox.desktop[6462]: message repeated 3 times: [ Gtk-Message: Failed to load module "canberra-gtk-module"]
Mar 28 09:53:29 U-C-001 gdm-session-worker[1589]: modprobe: ERROR: could not insert 'nvidia': Required key not available
Mar 28 09:53:29 U-C-001 kernel: [ 4471.952558] PKCS#7 signature not signed with a trusted key
Mar 28 09:53:32 U-C-001 firefox_firefox.desktop[6462]: Gtk-Message: Failed to load module "canberra-gtk-module"
Mar 28 09:53:32 U-C-001 firefox_firefox.desktop[6462]: Gtk-Message: Failed to load module "canberra-gtk-module"
Mar 28 09:54:45 U-C-001 org.gnome.Shell.desktop[1675]: Window manager warning: last_user_time (4548485) is greater than comparison timestamp (4548484). This most likely represents a buggy client sending inaccurate timestamps in messages such as _NET_ACTIVE_WINDOW. Trying to work around...
Mar 28 09:54:45 U-C-001 org.gnome.Shell.desktop[1675]: Window manager warning: 0x1c00010 ([firefox website name]) appears to be one of the offending windows with a timestamp of 4548485. Working around...
Mar 28 09:54:46 U-C-001 org.gnome.Shell.desktop[1675]: Window manager warning: last_user_time (4548515) is greater than comparison timestamp (4548514). This most likely represents a buggy client sending inaccurate timestamps in messages such as _NET_ACTIVE_WINDOW. Trying to work around...
Mar 28 09:54:46 U-C-001 org.gnome.Shell.desktop[1675]: Window manager warning: 0x1c00010 ([firefox website name]) appears to be one of the offending windows with a timestamp of 4548515. Working around...
Mar 28 09:54:49 U-C-001 org.gnome.Shell.desktop[1675]: Window manager warning: last_user_time (4551614) is greater than comparison timestamp (4551613). This most likely represents a buggy client sending inaccurate timestamps in messages such as _NET_ACTIVE_WINDOW. Trying to work around...
Mar 28 09:54:49 U-C-001 org.gnome.Shell.desktop[1675]: Window manager warning: 0x1c00010 ([firefox website name]) appears to be one of the offending windows with a timestamp of 4551614. Working around...
Mar 28 09:54:52 U-C-001 org.gnome.Shell.desktop[1675]: Window manager warning: last_user_time (4555028) is greater than comparison timestamp (4555027). This most likely represents a buggy client sending inaccurate timestamps in messages such as _NET_ACTIVE_WINDOW. Trying to work around...
Mar 28 09:54:52 U-C-001 org.gnome.Shell.desktop[1675]: Window manager warning: 0x1c00010 ([firefox website name]) appears to be one of the offending windows with a timestamp of 4555028. Working around...
Mar 28 09:59:39 U-C-001 kernel: [ 4841.893118] [UFW BLOCK] IN=wlp3s0 OUT= MAC=[MAC] SRC=[router internal IP] DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=15777 PROTO=2
Mar 28 10:02:33 U-C-001 systemd[1]: Started udev Coldplug all Devices.
Mar 28 10:02:33 U-C-001 kernel: [ 0.000000] microcode: microcode updated early to revision 0x8e, date = 2018-03-24
Mar 28 10:02:33 U-C-001 kernel: [ 0.000000] Linux version 4.15.0-46-generic (buildd@lgw01-amd64-038) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #49-Ubuntu SMP Wed Feb 6 09:33:07 UTC 2019 (Ubuntu 4.15.0-46.49-generic 4.15.18)
Although there are several errors in the syslog, they all occurred several minutes before shutdown and seem to be unrelated to it. Is there any way to further investigate the issue? Do you have any idea about what could have caused the shutdown? I am running Ubuntu 18.04.02.
Edit: Additional commands output moved from comments
ls -R /lib/modules/uname -r/kernel/ | grep noveau
nouveau
/lib/modules/4.15.0-46-generic/kernel/drivers/gpu/drm/nouveau:
nouveau.ko
ls -R /lib/modules/uname -r/kernel/ | grep nvidia
nvidia
/lib/modules/4.15.0-46-generic/kernel/drivers/net/ethernet/nvidia:
nvidia
/lib/modules/4.15.0-46-generic/kernel/drivers/video/fbdev/nvidia:
nvidiafb.ko
Edit 2: Additional commands output
modprobe nvidia
modprobe: ERROR: could not insert 'nvidia': Required key not available
lspci -k | grep -A 2 -E "(VGA|3D)"
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
Subsystem: Acer Incorporated [ALI] HD Graphics 620
Kernel driver in use: i915
--
01:00.0 3D controller: NVIDIA Corporation Device 179c (rev a2)
Subsystem: Acer Incorporated [ALI] Device 1094
Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia
Edit 3: Additional commands output without disabling the SecureBoot
mokutil --sb-state
SecureBoot enabled
ls /sys/firmware/efi
config_table esrt fw_vendor runtime-map vars
efivars fw_platform_size runtime systab
sudo lshw -c video | grep 'configuration'
configuration: driver=i915 latency=0
configuration: latency=0
