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Thread: Occasional black display in Joint Display mode

  1. #1

    Default Occasional black display in Joint Display mode

    I am running Leap 15.2/Gnome on my desktop with 2 Displays in 'Join' mode. One display is VGA and the other HDMI both connected to the same graphic card.

    For a while now (since Leap 15.1) I have been experiencing the following phenomenon: after the displays go into lock mode and I log in again to my user, (sometimes) the VGA screen is black. I recover the display by selecting 'Single Display' in 'Devices/Displays' settings, selecting 'Apply' and then cancelling with 'Revert Settings'.

    My primary display is HDMI which is the user login display after lock mode. The screen at first login after booting the system, which I cannot influence (?) is always the VGA monitor.

    My suspicion is that the blackout occurs when I leave my mouse on the VGA display before the lock-out takes place , but this may not be a consistent observation.

    Does anyone else notice similar behaviour? Can I do anything to stop this happening?

  2. #2

    Default Re: Occasional black display in Joint Display mode

    If you need more than presenting complains to a public then provide valuable info about hardware + drivers.

  3. #3
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    Default Re: Occasional black display in Joint Display mode

    Quote Originally Posted by hnimmo View Post
    I am running Leap 15.2/Gnome on my desktop with 2 Displays in 'Join' mode. One display is VGA and the other HDMI both connected to the same graphic card.

    For a while now (since Leap 15.1) I have been experiencing the following phenomenon: after the displays go into lock mode and I log in again to my user, (sometimes) the VGA screen is black. I recover the display by selecting 'Single Display' in 'Devices/Displays' settings, selecting 'Apply' and then cancelling with 'Revert Settings'.

    My primary display is HDMI which is the user login display after lock mode. The screen at first login after booting the system, which I cannot influence (?) is always the VGA monitor.

    My suspicion is that the blackout occurs when I leave my mouse on the VGA display before the lock-out takes place , but this may not be a consistent observation.

    Does anyone else notice similar behaviour? Can I do anything to stop this happening?
    Hi
    No BIOS setting to define the port to use? In settings you have defined the primary screen?

    Code:
    xrandr --current | grep "connected primary"
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
    If you find this post helpful and are logged into the web interface,
    please show your appreciation and click on the star below... Thanks!

  4. #4

    Default Re: Occasional black display in Joint Display mode

    Quote Originally Posted by Svyatko View Post
    If you need more than presenting complains to a public then provide valuable info about hardware + drivers.
    Thank you for replying. I'm not sure exactly what is needed, but from the Yast HW info I found
    Code:
    ID_MODEL_FROM_DATABASE=Caicos [Radeon HD 6450/7450/8450 / R5 230 OEM] (Radeon HD 6450 1 GB DDR3)
    The VGA Monitor is a Hanns-G and the HDMI monitor an AOC. Any more data needed?

  5. #5

    Default Re: Occasional black display in Joint Display mode

    Quote Originally Posted by malcolmlewis View Post
    Hi
    No BIOS setting to define the port to use? In settings you have defined the primary screen?

    Code:
    xrandr --current | grep "connected primary"
    Thanks, Malcolm.
    In the display setting the primary screen is the HDMI one (AOC 22"). I get no return response from
    Code:
    xrandr --current | grep "connected primary"

  6. #6
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    Default Re: Occasional black display in Joint Display mode

    Quote Originally Posted by hnimmo View Post
    Thanks, Malcolm.
    In the display setting the primary screen is the HDMI one (AOC 22"). I get no return response from
    Code:
    xrandr --current | grep "connected primary"
    Hi
    Ok, just look at the output and see which is primary;

    Code:
    xrandr --current
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
    If you find this post helpful and are logged into the web interface,
    please show your appreciation and click on the star below... Thanks!

  7. #7

    Default Re: Occasional black display in Joint Display mode

    Quote Originally Posted by hnimmo View Post
    My primary display is HDMI which is the user login display after lock mode. The screen at first login after booting the system, which I cannot influence (?) is always the VGA monitor.
    You may select needed monitor as primary (first).
    Please specify monitor model.
    Use digital connection (possibly DVI) if available.

    Show
    Code:
    inxi -Gxxx
    glxinfo | grep -i OpenGL

  8. #8

    Default Re: Occasional black display in Joint Display mode

    Quote Originally Posted by malcolmlewis View Post
    Hi
    Ok, just look at the output and see which is primary;

    Code:
    xrandr --current
    This is returned, but what does it tell me?
    Code:
    Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 8192 x 8192 
    XWAYLAND1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 480mm x 270mm 
       1920x1080     59.96*+ 
    XWAYLAND2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 480mm x 270mm 
       1920x1080     59.96*+

  9. #9

    Default Re: Occasional black display in Joint Display mode

    Quote Originally Posted by Svyatko View Post
    You may select needed monitor as primary (first).
    Please specify monitor model.
    Use digital connection (possibly DVI) if available.

    Show
    Code:
    inxi -Gxxx
    glxinfo | grep -i OpenGL
    Thanks. This should be a bit more informative
    Code:
    Graphics: 
      Device-1: AMD Caicos [Radeon HD 6450/7450/8450 / R5 230 OEM]  
      vendor: PC Partner Limited driver: radeon v: kernel bus ID: 01:00.0  
      chip ID: 1002:6779  
      Display: wayland server: X.Org 1.20.3 compositor: gnome-shell v: 3.34.5  
      driver: ati,radeon unloaded: fbdev,modesetting,vesa resolution:  
      1: 1920x1080~60Hz 2: 1920x1080~60Hz s-dpi: 102  
      OpenGL:  
      renderer: AMD CAICOS (DRM 2.50.0 / 5.3.18-lp152.63-default LLVM 9.0.1)  
      v: 3.3 Mesa 19.3.4 compat-v: 3.1 direct render: Yes
    Code:
    OpenGL vendor string: X.Org 
    OpenGL renderer string: AMD CAICOS (DRM 2.50.0 / 5.3.18-lp152.63-default, LLVM 9.0.1) 
    OpenGL core profile version string: 3.3 (Core Profile) Mesa 19.3.4 
    OpenGL core profile shading language version string: 3.30 
    OpenGL core profile context flags: (none) 
    OpenGL core profile profile mask: core profile 
    OpenGL core profile extensions: 
    OpenGL version string: 3.1 Mesa 19.3.4 
    OpenGL shading language version string: 1.40 
    OpenGL context flags: (none) 
    OpenGL extensions: 
    OpenGL ES profile version string: OpenGL ES 3.1 Mesa 19.3.4 
    OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10 
    OpenGL ES profile extensions:

  10. #10
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    Default Re: Occasional black display in Joint Display mode

    Quote Originally Posted by hnimmo View Post
    This is returned, but what does it tell me?
    Code:
    Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 8192 x 8192 
    XWAYLAND1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 480mm x 270mm 
       1920x1080     59.96*+ 
    XWAYLAND2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 480mm x 270mm 
       1920x1080     59.96*+
    Hi
    Ahh Wayland.... could be a Wayland issue, I run Xorg here... if you log out and select the cog, is Xorg an option? If so login into Xorg version and see if it duplicates.
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
    If you find this post helpful and are logged into the web interface,
    please show your appreciation and click on the star below... Thanks!

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