Mageia forum

After upgrading to Mageia 7 my laptop frequently gets a black screen, on average about once an hour, I think. When that happens the system still seems to be up, the backlight can be (un-)dimmed, and I can get back to normal operation by putting it in suspend by keyboard, and switching it on again.
I can't find anything relevant in the logs.

HP Elitebook 820. i5-4310U, 8GiB ram.
lspcidrake -v | grep VGA
Card:Intel 810 and later: Intel Corporation|Haswell-ULT Integrated Graphics Controller [DISPLAY_VGA] (vendor:8086 device:0a16 subv:103c subd:1991) (rev: 0b)
uname -a
Linux Anthraciet.lan 5.3.13-desktop-2.mga7 #1 SMP Mon Nov 25 20:30:40 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

xfce4.

How do you go about the undimming the backlight ? And can you please post the output of

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xset q

Also, what is configured in XFCE regarding energy saving / screenlocker / screensaver and display settings ?

doktor5000 wrote:How do you go about the undimming the backlight ?

Sorry, I don't understand the question.

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$ 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:  20
  auto repeating keys:  00ffffffdffffbbf
                        fadfffefffedffff
                        dfffffffffffffff
                        fff7ffffffffffff
  bell percent:  50    bell pitch:  400    bell duration:  100
Pointer Control:
  acceleration:  2/1    threshold:  4
Screen Saver:
  prefer blanking:  no    allow exposures:  no
  timeout:  300    cycle:  300
Colors:
  default colormap:  0x22    BlackPixel:  0x0    WhitePixel:  0xffffff
Font Path:
  catalogue:/etc/X11/fontpath.d,built-ins
DPMS (Energy Star):
  Standby: 600    Suspend: 900    Off: 1200
  DPMS is Enabled
  Monitor is On


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$ pwd
/home/user/.config/xfce4/xfconf/xfce-perchannel-xml
$ cat xfce4-power-manager.xml | grep property
  <property name="xfce4-power-manager" type="empty">
    <property name="cpu-scaling-gov" type="empty"/>
    <property name="show-tray-icon" type="bool" value="true"/>
    <property name="dpms-enabled" type="bool" value="true"/>
    <property name="on-ac-monitor-dpms-timeouts" type="empty"/>
    <property name="sleep-switch-action" type="string" value="Suspend"/>
    <property name="power-switch-action" type="string" value="Shutdown"/>
    <property name="dpms-sleep-mode" type="string" value="sleep"/>
    <property name="lock-screen-suspend-hibernate" type="bool" value="true"/>
    <property name="on-ac-dpms-sleep" type="uint" value="10"/>
    <property name="on-ac-dpms-off" type="uint" value="15"/>
    <property name="general-notification" type="bool" value="true"/>
    <property name="brightness-switch-restore-on-exit" type="int" value="0"/>
    <property name="brightness-switch" type="int" value="0"/>
    <property name="power-button-action" type="uint" value="3"/>
    <property name="sleep-button-action" type="uint" value="1"/>
    <property name="hibernate-button-action" type="uint" value="2"/>
    <property name="handle-brightness-keys" type="bool" value="true"/>
    <property name="lid-action-on-ac" type="uint" value="2"/>
    <property name="logind-handle-lid-switch" type="bool" value="false"/>
    <property name="lid-action-on-battery" type="uint" value="2"/>
    <property name="inactivity-on-battery" type="uint" value="14"/>
    <property name="critical-power-action" type="uint" value="2"/>
    <property name="brightness-level-on-battery" type="uint" value="1"/>
  </property>
$ cat xfce4-screensaver.xml | grep property
  <property name="saver" type="empty">
    <property name="mode" type="int" value="0"/>
  </property>
  <property name="lock" type="empty">
    <property name="enabled" type="bool" value="true"/>
    <property name="saver-activation" type="empty">
      <property name="enabled" type="bool" value="false"/>
    </property>
    <property name="status-messages" type="empty">
      <property name="enabled" type="bool" value="false"/>
    </property>
    <property name="user-switching" type="empty">
      <property name="enabled" type="bool" value="false"/>
    </property>
  </property>
$ cat displays.xml | grep property
  <property name="AutoEnableProfiles" type="empty"/>
  <property name="Default" type="empty">
    <property name="eDP1" type="string" value="1. LGD 13&quot;">
      <property name="Active" type="bool" value="true"/>
      <property name="Resolution" type="string" value="1366x768"/>
      <property name="RefreshRate" type="double" value="59.990502"/>
      <property name="Rotation" type="int" value="0"/>
      <property name="Reflection" type="string" value="0"/>
      <property name="Primary" type="bool" value="true"/>
      <property name="Position" type="empty">
        <property name="X" type="int" value="0"/>
        <property name="Y" type="int" value="0"/>
      </property>
    </property>
  <property name="Notify" type="bool" value="true"/>
  <property name="ActiveProfile" type="string" value="Default"/>

Mijzelf wrote:

doktor5000 wrote:How do you go about the undimming the backlight ?

Sorry, I don't understand the question.

What do you do to turn the backlight on again, is it enough to move the mouse or press any key ?

The backlight is stil on, when the screen turns black. It's the LCD which is black. And I have a keycombination to manage the backlight. (fn-F9 and fn-F10)