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    #1

    Laptop Screen Goes Blank After Roughly 30 Seconds Of No Mouse Movement

    I'm a novice at Linux/Ubuntu. I installed Kubuntu and have configured the Power Management and Display And Monitor settings appropriately. I've installed Caffeine, and have tried multiple times to prevent the screen from going blank. I've followed other articles and tried disabling the Screen Blanking feature. I've also disabled all the power saving options.


    Issue: After 31 seconds of not moving the mouse, even if multimedia - including web-based multimedia - is still playing, the screen goes blank. Please give me very specific instructions when referring to the Terminal commands and their respective directories.


    Thank you in advance.


    Troubleshooting performed:
    mv ~/.kde ~/.kde.old
    mv ~/.cache ~/.cache.old
    mv ~/.local ~/.local.old
    mv ~/.config ~/.config.old
    shutdown -r now

    Disabled Hardware Acceleration in Firefox and Chromium

    rm ~/.local/share/kscreen
    sudo killall sddm

    Tried New Sessions

    xset -dpms xset s noblank

    grep -iA2 vga 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) Subsystem: Dell Core Processor Integrated Graphics Controller Kernel driver in use: i915

    xset -q revealed the following:
    xset -q Keyboard Control:
    auto repeat: on key click percent: 0 LED mask: 00000000
    XKB indicators:
    00: Caps Lock: off 01: Num Lock: off 02: Scroll Lock: off 03: Compose: off 04: Kana: off 05: Sleep: off 06: Suspend: off 07: Mute: off 08: Misc: off 09: Mail: off 10: Charging: off 11: Shift Lock: off 12: Group 2: off 13: Mouse Keys: off
    auto repeat delay: 600 repeat rate: 25
    auto repeating keys: 00ffffffdffffbbf
    fadfffefffedffff
    9fffffffffffffff
    fff7ffffffffffff
    bell percent: 50 bell pitch: 400 bell duration: 100
    Pointer Control:
    acceleration: 20/10 threshold: 4
    Screen Saver:
    prefer blanking: yes allow exposures: yes
    timeout: 0 cycle: 600
    Colors:
    default colormap: 0x20 BlackPixel: 0x0 WhitePixel: 0xffffff
    Font Path:
    /usr/share/fonts/X11/misc,/usr/share/fonts/X11/Type1,built-ins
    DPMS (Energy Star):
    Standby: 0 Suspend: 0 Off: 0
    DPMS is Disabled


    Some Specs: Kubuntu 16.10 KDE Plasma Version 5.7.5 KDE Frameworks Version 5.26.0 Qt Version 5.6.1 Kernel Version 4.8.0-27-generic OS Type 64-bit Dell Latitude E5410
    Tags: None
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    #2
    don't have access to my linux box right now, but do you have a screensaver installed by any chance? It would override DPMS.

    Please Read Me
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      #3
      Originally posted by oshunluvr View Post
      don't have access to my linux box right now, but do you have a screensaver installed by any chance? It would override DPMS.
      I didn't. However, I thought that might be an interesting troubleshooting step and now have one installed. The issue persists. Aren't there a few Terminal commands that can be ran to disable screen timeouts, screen savers, all power management features, all energy saving features, and anything else that would be to blame for this issue?
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        #4
        Update: I uninstalled all screensaver programs that were blatantly present. Also running lspci | grep VGA revealed: 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) The issue is now occurring after just a few seconds of mouse inactivity - even if multimedia is playing.
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          #5
          As a test, boot from a LiveUSB of 16.10. Does the same problem of screen blanking happen?
          Windows no longer obstructs my view.
          Using Kubuntu Linux since March 23, 2007.
          "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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            #6
            Originally posted by Snowhog View Post
            As a test, boot from a LiveUSB of 16.10. Does the same problem of screen blanking happen?
            I tried running Qubes and the video/screen issue did not exist. Is that good enough, or should I try the live USB Kubuntu test, too?
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              #7
              As it's Kubuntu 16.10 you are running on your PC, yes, use a LiveUSB of Kubuntu 16.10 to test. If the screen blanking doesn't happen in a Live session, then it isn't Kubuntu that is causing your issue, but rather, something "added" after installation. So, test first and report back the results.
              Windows no longer obstructs my view.
              Using Kubuntu Linux since March 23, 2007.
              "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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                #8
                The issue does not occur in a Live Kubuntu session.
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                  #9
                  Then the issue you have in the installed Kubuntu 16.10 is the result of something you did; something installed or uninstalled, especially an application installed from a downloaded, but not thru apt or apt-get or using the Package Manager, or having added a third-party repository for an application that you wanted but wasn't available through the official repositories.

                  Did you add any third-party repositories after installation? Did you download then install any packages from the 'Net you found while browsing?
                  Windows no longer obstructs my view.
                  Using Kubuntu Linux since March 23, 2007.
                  "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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                    #10
                    Yes, I added a bunch of stuff. Too much to list. Isn't there an over-ride command script that can be ran?
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                      #11
                      Let's start by looking at what sources you are using.

                      Open a konsole and type:

                      cat /etc/apt/sources.list /etc/apt/sources.list.d/*

                      Copy/paste the output for a review.
                      Windows no longer obstructs my view.
                      Using Kubuntu Linux since March 23, 2007.
                      "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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                        #12
                        cat /etc/apt/sources.list /etc/apt/sources.list.d/*
                        #deb cdrom:[Kubuntu 16.10 _Yakkety Yak_ - Release amd64 (20161012.1)]/ yakkety main multiverse restricted universe

                        # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
                        # newer versions of the distribution.
                        deb http://gr.archive.ubuntu.com/ubuntu/ yakkety main restricted
                        # deb-src http://gr.archive.ubuntu.com/ubuntu/ yakkety main restricted

                        ## Major bug fix updates produced after the final release of the
                        ## distribution.
                        deb http://gr.archive.ubuntu.com/ubuntu/ yakkety-updates main restricted
                        # deb-src http://gr.archive.ubuntu.com/ubuntu/ yakkety-updates main restricted

                        ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
                        ## team. Also, please note that software in universe WILL NOT receive any
                        ## review or updates from the Ubuntu security team.
                        deb http://gr.archive.ubuntu.com/ubuntu/ yakkety universe
                        # deb-src http://gr.archive.ubuntu.com/ubuntu/ yakkety universe
                        deb http://gr.archive.ubuntu.com/ubuntu/ yakkety-updates universe
                        # deb-src http://gr.archive.ubuntu.com/ubuntu/ yakkety-updates universe

                        ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
                        ## team, and may not be under a free licence. Please satisfy yourself as to
                        ## your rights to use the software. Also, please note that software in
                        ## multiverse WILL NOT receive any review or updates from the Ubuntu
                        ## security team.
                        deb http://gr.archive.ubuntu.com/ubuntu/ yakkety multiverse
                        # deb-src http://gr.archive.ubuntu.com/ubuntu/ yakkety multiverse
                        deb http://gr.archive.ubuntu.com/ubuntu/ yakkety-updates multiverse
                        # deb-src http://gr.archive.ubuntu.com/ubuntu/ yakkety-updates multiverse

                        ## N.B. software from this repository may not have been tested as
                        ## extensively as that contained in the main release, although it includes
                        ## newer versions of some applications which may provide useful features.
                        ## Also, please note that software in backports WILL NOT receive any review
                        ## or updates from the Ubuntu security team.
                        deb http://gr.archive.ubuntu.com/ubuntu/ yakkety-backports main restricted universe multiverse
                        # deb-src http://gr.archive.ubuntu.com/ubuntu/ yakkety-backports main restricted universe multiverse

                        ## Uncomment the following two lines to add software from Canonical's
                        ## 'partner' repository.
                        ## This software is not part of Ubuntu, but is offered by Canonical and the
                        ## respective vendors as a service to Ubuntu users.
                        # deb http://archive.canonical.com/ubuntu yakkety partner
                        # deb-src http://archive.canonical.com/ubuntu yakkety partner

                        deb http://security.ubuntu.com/ubuntu yakkety-security main restricted
                        # deb-src http://security.ubuntu.com/ubuntu yakkety-security main restricted
                        deb http://security.ubuntu.com/ubuntu yakkety-security universe
                        # deb-src http://security.ubuntu.com/ubuntu yakkety-security universe
                        deb http://security.ubuntu.com/ubuntu yakkety-security multiverse
                        # deb-src http://security.ubuntu.com/ubuntu yakkety-security multiverse
                        deb https://tiliado.eu/nuvolaplayer/repository/deb/ yakkety stable # tiliado-nuvolaplayer stable
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                          #13
                          Originally posted by Domino View Post
                          cat /etc/apt/sources.list /etc/apt/sources.list.d/*
                          deb https://tiliado.eu/nuvolaplayer/repository/deb/ yakkety stable # tiliado-nuvolaplayer stable
                          This repository entry is in /etc/apt/sources.list.d as (probably) tiliado-nuvolaplayer.list. It's a repository you added after installation of Kubuntu 16.10. As it's the only non-official repository you have, I'm inclined to think that the application you installed from this repository; Nuvola Player; is contributing to your issue. So let's test that theory by uninstalling the application and logging out and rebooting.
                          Windows no longer obstructs my view.
                          Using Kubuntu Linux since March 23, 2007.
                          "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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                            #14
                            I appreciate your assistance. The issue with the screen turning black occurred well before installing Nuvola Player
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                              #15
                              Okay. Did you at any time after initial installation, install any screen saver applications?
                              Windows no longer obstructs my view.
                              Using Kubuntu Linux since March 23, 2007.
                              "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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