Ubuntu 16.04.2 and 16.10 screen goes black randomly for a second

What is the output of:

sudo lshw -C display; lsb_release -a; uname -a; xrandr

Thanks

Also what is the output of:

sudo dmidecode -t 1

Thanks

Here's the results of sudo lshw -C display; lsb_release -a; uname -a; xrandr:

 *-display
       description: VGA compatible controller
       produit: Core Processor Integrated Graphics Controller
       fabriquant: Intel Corporation
       identifiant matériel: 2
       information bus: pci@0000:00:02.0
       version: 02
       bits: 64 bits
       horloge: 33MHz
       fonctionnalités: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       ressources: irq:29 mémoire:d0000000-d03fffff mémoire:c0000000-cfffffff portE/S:5058(taille=8) mémoire:c0000-dffff
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial
Linux dlalonde 4.8.0-39-generic #42~16.04.1-Ubuntu SMP Mon Feb 20 15:06:07 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
eDP-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 309mm x 174mm
   1366x768 60.02*+ 40.01
   1360x768 59.80 59.96
   1024x768 60.04 60.00
   960x720 60.00
   928x696 60.05
   896x672 60.01
   960x600 60.00
   960x540 59.99
   800x600 60.00 60.32 56.25
   840x525 60.01 59.88
   800x512 60.17
   700x525 59.98
   640x512 60.02
   720x450 59.89
   640x480 60.00 59.94
   680x384 59.80 59.96
   576x432 60.06
   512x384 60.00
   400x300 60.32 56.34
   320x240 60.05
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
HDMI-3 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)

And here are the results of sudo dmidecode -t 1:

# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.6 present.

Handle 0x000A, DMI type 1, 27 bytes
System Information
 Manufacturer: Hewlett-Packard
 Product Name: HP EliteBook 8440p
 Version:
 Serial Number: CND1020RBG
 UUID: 0937DFFF-ECFB-11DE-81D0-B9F76E392C38
 Wake-up Type: Power Switch
 SKU Number: SJ047UP#ABA
 Family: 103C_5336AN

I noticed it happens a lot when I'm using the Terminal when I press backspace or enter.

Have you tried setting a different resolution or refresh rate to see if it makes any difference?

Yesterday I added i915.enable_psr=0 to GRUB and so far so good. So it seems it has to do with Panel Self Refresh

This is still happening even with PSR disabled. It's very annoying. :/

I tried adding i915.enable_psr=0 and i915.enable_rc6=0 to GRUB to no avail. Can anyone help? Certainly I'm not the only one with this issue! On a LTS!

Here what I was told to do (which worked) on AskUbuntu:

"The X server in 16.04.2 point release has been back-ported from 16.10. That must be why you're facing the same issue on both of them.

I had been experiencing a lot of random flickering as well, after the upgrade.

Removing the new X stack seems to have fixed it:

sudo apt remove xserver-xorg-core-hwe-16.04 xserver-xorg-input-all-hwe-16.04 linux-generic-hwe-16.04 xserver-xorg-video-all-hwe-16.04

However, ubuntu-dekstop will also be removed!

So, you need to do the following straight away:

sudo apt install xserver-xorg-core

sudo apt install ubuntu-desktop xserver-xorg xserver-xorg-video-all xserver-xorg-input-all libgl1-mesa-dri libgl1-mesa-glx"

My current problem has been solved but here's to hoping this bug is fixed without having to rollback to an older version.

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