Hi! So I use Elementary OS for a few weeks now and it's pretty amazing. Then I was just watching random YouTube videos and all of the sudden my laptop just rebooted. And funnily enough every time I open YouTube and launch a video it crashes again randomly. Sometimes after 1 minute and sometimes after an hour. I'm completely lost why it's happening. Here's the log from the crash: Spoiler: Log Code (Text): Mar 9 11:11:34 tomek-X550LD kernel: [ 3882.198665] acpi device:63: Cannot transition to power state D3hot for parent in (unknown) Mar 9 11:11:34 tomek-X550LD NetworkManager[1040]: <info> [1520590294.5637] manager: sleep requested (sleeping: no enabled: yes) Mar 9 11:11:34 tomek-X550LD NetworkManager[1040]: <info> [1520590294.5638] manager: sleeping... Mar 9 11:11:34 tomek-X550LD NetworkManager[1040]: <info> [1520590294.5641] manager: NetworkManager state is now ASLEEP Mar 9 11:11:34 tomek-X550LD NetworkManager[1040]: <info> [1520590294.5646] device (wlp3s0): state change: activated -> deactivating (reason 'sleeping') [100 110 37] Mar 9 11:11:34 tomek-X550LD whoopsie[2034]: [11:11:34] offline Mar 9 11:11:34 tomek-X550LD NetworkManager[1040]: <info> [1520590294.6288] device (wlp3s0): state change: deactivating -> disconnected (reason 'sleeping') [110 30 37] Mar 9 11:11:34 tomek-X550LD avahi-daemon[979]: Withdrawing address record for fe80::9ead:97ff:fe31:628f on wlp3s0. Mar 9 11:11:34 tomek-X550LD avahi-daemon[979]: Leaving mDNS multicast group on interface wlp3s0.IPv6 with address fe80::9ead:97ff:fe31:628f. Mar 9 11:11:34 tomek-X550LD avahi-daemon[979]: Interface wlp3s0.IPv6 no longer relevant for mDNS. Mar 9 11:11:34 tomek-X550LD NetworkManager[1040]: <info> [1520590294.6620] dhcp4 (wlp3s0): canceled DHCP transaction, DHCP client pid 1883 Mar 9 11:11:34 tomek-X550LD NetworkManager[1040]: <info> [1520590294.6621] dhcp4 (wlp3s0): state changed bound -> done Mar 9 11:11:34 tomek-X550LD NetworkManager[1040]: <info> [1520590294.6631] dns-mgr: Writing DNS information to /sbin/resolvconf Mar 9 11:11:34 tomek-X550LD avahi-daemon[979]: Withdrawing address record for 192.168.0.103 on wlp3s0. Mar 9 11:11:34 tomek-X550LD avahi-daemon[979]: Leaving mDNS multicast group on interface wlp3s0.IPv4 with address 192.168.0.103. Mar 9 11:11:34 tomek-X550LD avahi-daemon[979]: Interface wlp3s0.IPv4 no longer relevant for mDNS. Mar 9 11:11:34 tomek-X550LD dnsmasq[1901]: setting upstream servers from DBus Mar 9 11:11:34 tomek-X550LD kernel: [ 3882.305680] wlp3s0: deauthenticating from 98:de:d0:4e:0a:fa by local choice (Reason: 3=DEAUTH_LEAVING) Mar 9 11:11:34 tomek-X550LD dbus[1020]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' Mar 9 11:11:34 tomek-X550LD systemd[1]: Starting Network Manager Script Dispatcher Service... Mar 9 11:11:34 tomek-X550LD dbus[1020]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' Mar 9 11:11:34 tomek-X550LD systemd[1]: Started Network Manager Script Dispatcher Service. Mar 9 11:11:34 tomek-X550LD nm-dispatcher: req:1 'down' [wlp3s0]: new request (2 scripts) Mar 9 11:11:34 tomek-X550LD nm-dispatcher: req:1 'down' [wlp3s0]: start running ordered scripts... Mar 9 11:11:34 tomek-X550LD NetworkManager[1040]: <info> [1520590294.7026] device (wlp3s0): state change: disconnected -> unmanaged (reason 'sleeping') [30 10 37] Mar 9 11:11:34 tomek-X550LD wpa_supplicant[1147]: wlp3s0: CTRL-EVENT-DISCONNECTED bssid=98:de:d0:4e:0a:fa reason=3 locally_generated=1 Mar 9 11:11:34 tomek-X550LD wpa_supplicant[1147]: wlp3s0: CTRL-EVENT-SCAN-FAILED ret=-100 Mar 9 11:11:34 tomek-X550LD wpa_supplicant[1147]: nl80211: deinit ifname=wlp3s0 disabled_11b_rates=0 Mar 9 11:11:34 tomek-X550LD systemd[1]: Reached target Sleep. Mar 9 11:11:34 tomek-X550LD systemd[1]: Starting Suspend... Mar 9 11:11:34 tomek-X550LD gnome-session[2064]: (captive-login:26546): Gtk-WARNING **: Theme parsing error: gtk.css:2788:68: Not using units is deprecated. Assuming 'px'. Mar 9 11:11:34 tomek-X550LD gnome-session[2064]: (captive-login:26546): Gtk-WARNING **: Theme parsing error: gtk.css:2788:70: Not using units is deprecated. Assuming 'px'. Mar 9 11:11:34 tomek-X550LD gnome-session[2064]: (captive-login:26546): Gtk-WARNING **: Theme parsing error: gtk.css:3989:0: Missing semicolon at end of color definition Mar 9 11:11:34 tomek-X550LD systemd-sleep[26579]: Failed to connect to non-global ctrl_ifname: (nil) error: No such file or directory Mar 9 11:11:34 tomek-X550LD systemd-sleep[26582]: /lib/systemd/system-sleep/wpasupplicant failed with error code 255. Mar 9 11:11:34 tomek-X550LD systemd-sleep[26579]: Suspending system... Any help will be appreciated!