I've got a problem. From time to time screen in my laptop just goes black for 3-5 sec, but I can still write, so system works well.
Someone can help?
HW: HP 840 G1
SW: Ubuntu 18.04 LTS
I have noticed it twice by last hour: 11:09 - black screen for 2 seconds, 11:47 - black screen for 3 seconds.
Log of first black screen:
perf: interrupt took too long (2510 > 2500), lowering kernel.perf_event_max_sample_rate to 79500 time was 11:08:58, then
[session uid=1000 pid=1544] Activating service name='org.gnome.ControlCenter.SearchProvider' requested by ':1.21' (uid=1000 pid=1669 comm="/usr/bin/gnome-shell " label="unconfined")
[session uid=1000 pid=1544] Activating service name='org.gnome.ControlCenter.SearchProvider' requested by ':1.21' (uid=1000 pid=1669 comm="/usr/bin/gnome-shell " label="unconfined")
[session uid=1000 pid=1544] Activating service name='org.gnome.ControlCenter.SearchProvider' requested by ':1.21' (uid=1000 pid=1669 comm="/usr/bin/gnome-shell " label="unconfined")
[session uid=1000 pid=1544] Successfully activated service 'org.gnome.ControlCenter.SearchProvider'
[session uid=1000 pid=1544] Successfully activated service 'org.gnome.Nautilus'
[session uid=1000 pid=1544] Successfully activated service 'org.gnome.seahorse.Application'
11:09:46
And second 11:47:47 AM:
[session uid=1000 pid=1544] Activating service name='org.gnome.ControlCenter.SearchProvider' requested by ':1.21' (uid=1000 pid=1669 comm="/usr/bin/gnome-shell " label="unconfined")
[session uid=1000 pid=1544] Activating service name='org.gnome.seahorse.Application' requested by ':1.21' (uid=1000 pid=1669 comm="/usr/bin/gnome-shell " label="unconfined")
[session uid=1000 pid=1544] Successfully activated service 'org.gnome.ControlCenter.SearchProvider'
[session uid=1000 pid=1544] Successfully activated service 'org.gnome.seahorse.Application'
and 11:47:50 AM
[session uid=1000 pid=1544] Successfully activated service 'org.gnome.seahorse.Application'