Slow Flicker - Ubuntu 18.04, KDE, Quadro M4000, 3DVision, ASUS VG278HR, active DP to DVI Adapter

Hello all,

we tried to switch from 14.04 to 18.04 running KDE on a Quadro M4000 and 3DVision.
Monitor is an ASUS VG278HR with integrated Emitter.
All the years it worked like a charm, but with 18.04 the screen turns black for 5-6 seconds, shows the actual desktop for a glimpse, turns black and so on.
And only if I try to activate the 3D Stereo.
Nvidia-settings shows perfect 120Hz, 1920x1080. Wenn I check “Force Stereo Flipping” the flicker starts,
when I uncheck it blindly, it stops.
I tried the drivers 390, 396 and 410, Nouveau blacklisted.
I changed the xorg.conf in almost every way Google told me, I tried all the settings in nvidia-settings,
I even tried to convince the computer with Compiz CCSM, daring to uncheck “Force complete redraw on initial damage”.
Am I looking at the wrong places?
Can someone explain what is happening?
Can someone fix it?

I am happy to provide any file needed for solving the issue, just tell me.

Kind regards,

Nicolai

AFAIK, the current state of stereo is that the composite extension of the Xserver still has to be disabled since no stereo-aware compositing window manager exists.
Disabling the composite extension then requires to use a non-compositing WM like xfwm from the xfce desktop.

Thank you for the fast answer!

I should have posted my xorg.conf:

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 390.87  (buildmeister@swio-display-x64-rhel04-14)  Tue Aug 21 17:33:38 PDT 2018

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 410.73

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"

    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Ancor Communications Inc ASUS VG278HR"
    HorizSync       24.0 - 159.0
    VertRefresh     50.0 - 144.0
#    Option         "DPMS" "FALSE"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "Quadro M4000"
#    Option "RegistryDwords" "PerfLevelSrc=0x2222"
#    Option "TripleBuffer" "True"
EndSection

Section "Screen"

# Removed Option "metamodes" "1920x1080_120 +0+0"
# Removed Option "metamodes" "1920x1080_120 +0+0 {ForceCompositionPipeline=On, ForceFullCompositionPipeline=On}"
# Removed Option "metamodes" "1920x1080_120 +0+0 {ForceCompositionPipeline=On}"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "AllowDFPStereo" "yes"
    Option         "Stereo" "10"
    Option         "nvidiaXineramaInfoOrder" "DFP-6.2"
    Option         "metamodes" "1920x1080_120 +0+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
#    Option         "ForceStereoFlipping" "True"
#    Option "FlatPanelProperties" "Dithering=Disabled"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Extensions"

# Removed Option "Composite" "disable"
    Option         "Composite" "Disable"
EndSection

Whatever starts with #, I tried.
The remaining xorg.conf is what worked on all our Computers since 2014, Ubuntu 14.04 with KDE, I don’t understand everything, but it worked magically.

This is my /var/log/Xorg.0.log for one Boot to Desktop and one try to StereoFlipping:

[    45.425] (--) Log file renamed from "/var/log/Xorg.pid-1860.log" to "/var/log/Xorg.0.log"
[    45.425] 
X.Org X Server 1.19.6
Release Date: 2017-12-20
[    45.425] X Protocol Version 11, Revision 0
[    45.425] Build Operating System: Linux 4.4.0-138-generic x86_64 Ubuntu
[    45.425] Current Operating System: Linux diaz 4.15.0-39-generic #42-Ubuntu SMP Tue Oct 23 15:48:01 UTC 2018 x86_64
[    45.425] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-39-generic root=UUID=3cf7e2ba-e32e-11e8-b348-901b0e2e6edc ro maybe-ubiquity
[    45.425] Build Date: 25 October 2018  04:11:27PM
[    45.425] xorg-server 2:1.19.6-1ubuntu4.2 (For technical support please see http://www.ubuntu.com/support) 
[    45.425] Current version of pixman: 0.34.0
[    45.425] 	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
[    45.425] Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[    45.425] (==) Log file: "/var/log/Xorg.0.log", Time: Tue Nov 20 17:17:30 2018
[    45.425] (==) Using config file: "/etc/X11/xorg.conf"
[    45.425] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[    45.425] (==) ServerLayout "Layout0"
[    45.425] (**) |-->Screen "Screen0" (0)
[    45.425] (**) |   |-->Monitor "Monitor0"
[    45.425] (**) |   |-->Device "Device0"
[    45.425] (**) |-->Input Device "Keyboard0"
[    45.425] (**) |-->Input Device "Mouse0"
[    45.425] (**) Option "Xinerama" "0"
[    45.425] (==) Automatically adding devices
[    45.425] (==) Automatically enabling devices
[    45.425] (==) Automatically adding GPU devices
[    45.425] (==) Automatically binding GPU devices
[    45.425] (==) Max clients allowed: 256, resource mask: 0x1fffff
[    45.425] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[    45.425] 	Entry deleted from font path.
[    45.426] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[    45.426] 	Entry deleted from font path.
[    45.426] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[    45.426] 	Entry deleted from font path.
[    45.426] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[    45.426] 	Entry deleted from font path.
[    45.426] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[    45.426] 	Entry deleted from font path.
[    45.426] (==) FontPath set to:
	/usr/share/fonts/X11/misc,
	/usr/share/fonts/X11/Type1,
	built-ins
[    45.426] (==) ModulePath set to "/usr/lib/xorg/modules"
[    45.426] (**) Extension "Composite" is disabled
[    45.426] (WW) Hotplugging is on, devices using drivers 'kbd', 'mouse' or 'vmmouse' will be disabled.
[    45.426] (WW) Disabling Keyboard0
[    45.426] (WW) Disabling Mouse0
[    45.426] (II) Loader magic: 0x56280cbfa020
[    45.426] (II) Module ABI versions:
[    45.426] 	X.Org ANSI C Emulation: 0.4
[    45.426] 	X.Org Video Driver: 23.0
[    45.426] 	X.Org XInput driver : 24.1
[    45.426] 	X.Org Server Extension : 10.0
[    45.426] (++) using VT number 1

[    45.426] (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration
[    45.426] (II) xfree86: Adding drm device (/dev/dri/card0)
[    45.427] (**) OutputClass "nvidia" ModulePath extended to "/usr/lib/x86_64-linux-gnu/nvidia/xorg,/usr/lib/xorg/modules"
[    45.427] (--) PCI:*(0:1:0:0) 10de:13f1:10de:1153 rev 161, Mem @ 0xf6000000/16777216, 0xe0000000/268435456, 0xf0000000/33554432, I/O @ 0x0000e000/128, BIOS @ 0x????????/131072
[    45.427] (II) LoadModule: "glx"
[    45.427] (II) Loading /usr/lib/x86_64-linux-gnu/nvidia/xorg/libglx.so
[    45.870] (II) Module glx: vendor="NVIDIA Corporation"
[    45.870] 	compiled for 4.0.2, module version = 1.0.0
[    45.870] 	Module class: X.Org Server Extension
[    45.870] (II) NVIDIA GLX Module  396.54  Tue Aug 14 22:37:05 PDT 2018
[    45.870] (II) LoadModule: "nvidia"
[    45.870] (II) Loading /usr/lib/x86_64-linux-gnu/nvidia/xorg/nvidia_drv.so
[    45.870] (II) Module nvidia: vendor="NVIDIA Corporation"
[    45.870] 	compiled for 4.0.2, module version = 1.0.0
[    45.870] 	Module class: X.Org Video Driver
[    45.870] (II) NVIDIA dlloader X Driver  396.54  Tue Aug 14 22:15:03 PDT 2018
[    45.870] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[    45.876] (II) Loading sub module "fb"
[    45.876] (II) LoadModule: "fb"
[    45.876] (II) Loading /usr/lib/xorg/modules/libfb.so
[    45.876] (II) Module fb: vendor="X.Org Foundation"
[    45.876] 	compiled for 1.19.6, module version = 1.0.0
[    45.876] 	ABI class: X.Org ANSI C Emulation, version 0.4
[    45.876] (II) Loading sub module "wfb"
[    45.876] (II) LoadModule: "wfb"
[    45.876] (II) Loading /usr/lib/xorg/modules/libwfb.so
[    45.876] (II) Module wfb: vendor="X.Org Foundation"
[    45.876] 	compiled for 1.19.6, module version = 1.0.0
[    45.876] 	ABI class: X.Org ANSI C Emulation, version 0.4
[    45.876] (II) Loading sub module "ramdac"
[    45.876] (II) LoadModule: "ramdac"
[    45.876] (II) Module "ramdac" already built-in
[    45.877] (**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
[    45.877] (==) NVIDIA(0): RGB weight 888
[    45.877] (==) NVIDIA(0): Default visual is TrueColor
[    45.877] (==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
[    45.877] (II) Applying OutputClass "nvidia" options to /dev/dri/card0
[    45.877] (**) NVIDIA(0): Option "Stereo" "10"
[    45.877] (**) NVIDIA(0): Option "nvidiaXineramaInfoOrder" "DFP-6.2"
[    45.877] (**) NVIDIA(0): Option "SLI" "Off"
[    45.877] (**) NVIDIA(0): Option "MultiGPU" "Off"
[    45.877] (**) NVIDIA(0): Option "TripleBuffer" "True"
[    45.877] (**) NVIDIA(0): Option "FlatPanelProperties" "Dithering=Disabled"
[    45.877] (**) NVIDIA(0): Option "BaseMosaic" "off"
[    45.877] (**) NVIDIA(0): Option "AllowEmptyInitialConfiguration"
[    45.877] (**) NVIDIA(0): USB IR emitter stereo requested
[    45.877] (**) NVIDIA(0): NVIDIA SLI disabled.
[    45.877] (**) NVIDIA(0): NVIDIA Multi-GPU disabled.
[    45.877] (**) NVIDIA(0): Option "MetaModes" "1920x1080_120 +0+0"
[    45.877] (**) NVIDIA(0): Option "RegistryDwords" "PerfLevelSrc=0x2222"
[    45.877] (**) NVIDIA(0): Enabling 2D acceleration
[    50.507] (--) NVIDIA(0): Valid display device(s) on GPU-0 at PCI:1:0:0
[    50.507] (--) NVIDIA(0):     DFP-2.2
[    50.507] (--) NVIDIA(0):     DFP-0
[    50.507] (--) NVIDIA(0):     DFP-1
[    50.507] (--) NVIDIA(0):     DFP-2 (boot)
[    50.507] (--) NVIDIA(0):     DFP-3
[    50.507] (--) NVIDIA(0):     DFP-4
[    50.507] (--) NVIDIA(0):     DFP-5
[    50.507] (--) NVIDIA(0):     DFP-6
[    50.507] (--) NVIDIA(0):     DFP-7
[    50.508] (II) NVIDIA(0): NVIDIA GPU Quadro M4000 (GM204GL-A) at PCI:1:0:0 (GPU-0)
[    50.508] (--) NVIDIA(0): Memory: 8388608 kBytes
[    50.508] (--) NVIDIA(0): VideoBIOS: 84.04.88.00.5d
[    50.508] (II) NVIDIA(0): Detected PCI Express Link width: 16X
[    50.508] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): connected
[    50.508] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): Internal DisplayPort
[    50.508] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): 960.0 MHz maximum pixel clock
[    50.508] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): supports NVIDIA 3D Vision stereo.
[    50.508] (--) NVIDIA(GPU-0): 
[    50.508] (--) NVIDIA(GPU-0): DFP-0: disconnected
[    50.508] (--) NVIDIA(GPU-0): DFP-0: Internal DisplayPort
[    50.508] (--) NVIDIA(GPU-0): DFP-0: 960.0 MHz maximum pixel clock
[    50.508] (--) NVIDIA(GPU-0): 
[    50.508] (--) NVIDIA(GPU-0): DFP-1: disconnected
[    50.508] (--) NVIDIA(GPU-0): DFP-1: Internal TMDS
[    50.508] (--) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
[    50.508] (--) NVIDIA(GPU-0): 
[    50.508] (--) NVIDIA(GPU-0): DFP-2: disconnected
[    50.508] (--) NVIDIA(GPU-0): DFP-2: Internal DisplayPort
[    50.508] (--) NVIDIA(GPU-0): DFP-2: 960.0 MHz maximum pixel clock
[    50.508] (--) NVIDIA(GPU-0): 
[    50.509] (--) NVIDIA(GPU-0): DFP-3: disconnected
[    50.509] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS
[    50.509] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock
[    50.509] (--) NVIDIA(GPU-0): 
[    50.509] (--) NVIDIA(GPU-0): DFP-4: disconnected
[    50.509] (--) NVIDIA(GPU-0): DFP-4: Internal DisplayPort
[    50.509] (--) NVIDIA(GPU-0): DFP-4: 960.0 MHz maximum pixel clock
[    50.509] (--) NVIDIA(GPU-0): 
[    50.510] (--) NVIDIA(GPU-0): DFP-5: disconnected
[    50.510] (--) NVIDIA(GPU-0): DFP-5: Internal TMDS
[    50.510] (--) NVIDIA(GPU-0): DFP-5: 165.0 MHz maximum pixel clock
[    50.510] (--) NVIDIA(GPU-0): 
[    50.510] (--) NVIDIA(GPU-0): DFP-6: disconnected
[    50.510] (--) NVIDIA(GPU-0): DFP-6: Internal DisplayPort
[    50.510] (--) NVIDIA(GPU-0): DFP-6: 960.0 MHz maximum pixel clock
[    50.510] (--) NVIDIA(GPU-0): 
[    50.510] (--) NVIDIA(GPU-0): DFP-7: disconnected
[    50.510] (--) NVIDIA(GPU-0): DFP-7: Internal TMDS
[    50.510] (--) NVIDIA(GPU-0): DFP-7: 165.0 MHz maximum pixel clock
[    50.510] (--) NVIDIA(GPU-0): 
[    50.523] (II) NVIDIA(0): Validated MetaModes:
[    50.523] (II) NVIDIA(0):     "1920x1080_120+0+0"
[    50.523] (II) NVIDIA(0): Virtual screen size determined to be 1920 x 1080
[    50.526] (WW) NVIDIA(0): Unable to match display device name "DFP-6.2" from
[    50.526] (WW) NVIDIA(0):     nvidiaXineramaInfoOrder
[    50.526] (--) NVIDIA(0): DPI set to (81, 80); computed from "UseEdidDpi" X config
[    50.526] (--) NVIDIA(0):     option
[    50.526] (--) Depth 24 pixmap format is 32 bpp
[    50.526] (II) NVIDIA: Using 6144.00 MB of virtual memory for indirect memory
[    50.526] (II) NVIDIA:     access.
[    50.541] (II) NVIDIA(0): Setting mode "1920x1080_120+0+0"
[    62.786] (==) NVIDIA(0): Disabling shared memory pixmaps
[    62.786] (==) NVIDIA(0): Backing store disabled
[    62.786] (==) NVIDIA(0): Silken mouse enabled
[    62.786] (WW) NVIDIA(0): Option "AllowDFPStereo" is not used
[    62.786] (II) Loading sub module "dri2"
[    62.786] (II) LoadModule: "dri2"
[    62.786] (II) Module "dri2" already built-in
[    62.786] (II) NVIDIA(0): [DRI2] Setup complete
[    62.786] (II) NVIDIA(0): [DRI2]   VDPAU driver: nvidia
[    62.786] (--) RandR disabled
[    62.793] (II) SELinux: Disabled on system
[    62.793] (II) Initializing extension GLX
[    62.794] (II) Indirect GLX disabled.
[    62.869] (II) config/udev: Adding input device Power Button (/dev/input/event1)
[    62.869] (**) Power Button: Applying InputClass "libinput keyboard catchall"
[    62.869] (II) LoadModule: "libinput"
[    62.869] (II) Loading /usr/lib/xorg/modules/input/libinput_drv.so
[    62.912] (II) Module libinput: vendor="X.Org Foundation"
[    62.912] 	compiled for 1.19.6, module version = 0.27.1
[    62.912] 	Module class: X.Org XInput Driver
[    62.912] 	ABI class: X.Org XInput driver, version 24.1
[    62.912] (II) Using input driver 'libinput' for 'Power Button'
[    62.912] (**) Power Button: always reports core events
[    62.912] (**) Option "Device" "/dev/input/event1"
[    62.912] (**) Option "_source" "server/udev"
[    62.912] (II) event1  - Power Button: is tagged by udev as: Keyboard
[    62.912] (II) event1  - Power Button: device is a keyboard
[    62.912] (II) event1  - Power Button: device removed
[    62.952] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1/event1"
[    62.952] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
[    62.952] (**) Option "xkb_model" "pc105"
[    62.952] (**) Option "xkb_layout" "de"
[    62.952] (**) Option "xkb_variant" "nodeadkeys"
[    62.964] (II) event1  - Power Button: is tagged by udev as: Keyboard
[    62.964] (II) event1  - Power Button: device is a keyboard
[    62.964] (II) config/udev: Adding input device Fujitsu FUJ02E3 (/dev/input/event4)
[    62.964] (**) Fujitsu FUJ02E3: Applying InputClass "libinput keyboard catchall"
[    62.964] (II) Using input driver 'libinput' for 'Fujitsu FUJ02E3'
[    62.964] (**) Fujitsu FUJ02E3: always reports core events
[    62.964] (**) Option "Device" "/dev/input/event4"
[    62.964] (**) Option "_source" "server/udev"
[    62.964] (II) event4  - Fujitsu FUJ02E3: is tagged by udev as: Keyboard
[    62.964] (II) event4  - Fujitsu FUJ02E3: device is a keyboard
[    62.964] (II) event4  - Fujitsu FUJ02E3: device removed
[    62.984] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:00/FUJ02E3:00/input/input4/event4"
[    62.984] (II) XINPUT: Adding extended input device "Fujitsu FUJ02E3" (type: KEYBOARD, id 7)
[    62.984] (**) Option "xkb_model" "pc105"
[    62.984] (**) Option "xkb_layout" "de"
[    62.984] (**) Option "xkb_variant" "nodeadkeys"
[    62.984] (II) event4  - Fujitsu FUJ02E3: is tagged by udev as: Keyboard
[    62.984] (II) event4  - Fujitsu FUJ02E3: device is a keyboard
[    62.985] (II) config/udev: Adding input device Power Button (/dev/input/event0)
[    62.985] (**) Power Button: Applying InputClass "libinput keyboard catchall"
[    62.985] (II) Using input driver 'libinput' for 'Power Button'
[    62.985] (**) Power Button: always reports core events
[    62.985] (**) Option "Device" "/dev/input/event0"
[    62.985] (**) Option "_source" "server/udev"
[    62.985] (II) event0  - Power Button: is tagged by udev as: Keyboard
[    62.985] (II) event0  - Power Button: device is a keyboard
[    62.985] (II) event0  - Power Button: device removed
[    63.012] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0/event0"
[    63.012] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 8)
[    63.012] (**) Option "xkb_model" "pc105"
[    63.012] (**) Option "xkb_layout" "de"
[    63.012] (**) Option "xkb_variant" "nodeadkeys"
[    63.012] (II) event0  - Power Button: is tagged by udev as: Keyboard
[    63.012] (II) event0  - Power Button: device is a keyboard
[    63.013] (II) config/udev: Adding input device HDA NVidia HDMI/DP,pcm=3 (/dev/input/event10)
[    63.013] (II) No input driver specified, ignoring this device.
[    63.013] (II) This device may have been added with another device file.
[    63.013] (II) config/udev: Adding input device HDA NVidia HDMI/DP,pcm=7 (/dev/input/event11)
[    63.013] (II) No input driver specified, ignoring this device.
[    63.013] (II) This device may have been added with another device file.
[    63.013] (II) config/udev: Adding input device HDA NVidia HDMI/DP,pcm=8 (/dev/input/event12)
[    63.013] (II) No input driver specified, ignoring this device.
[    63.013] (II) This device may have been added with another device file.
[    63.014] (II) config/udev: Adding input device HDA NVidia HDMI/DP,pcm=9 (/dev/input/event13)
[    63.014] (II) No input driver specified, ignoring this device.
[    63.014] (II) This device may have been added with another device file.
[    63.014] (II) config/udev: Adding input device Logitech USB-PS/2 Optical Mouse (/dev/input/event2)
[    63.014] (**) Logitech USB-PS/2 Optical Mouse: Applying InputClass "libinput pointer catchall"
[    63.014] (II) Using input driver 'libinput' for 'Logitech USB-PS/2 Optical Mouse'
[    63.014] (**) Logitech USB-PS/2 Optical Mouse: always reports core events
[    63.014] (**) Option "Device" "/dev/input/event2"
[    63.014] (**) Option "_source" "server/udev"
[    63.072] (II) event2  - Logitech USB-PS/2 Optical Mouse: is tagged by udev as: Mouse
[    63.072] (II) event2  - Logitech USB-PS/2 Optical Mouse: device set to 1000 DPI
[    63.072] (II) event2  - Logitech USB-PS/2 Optical Mouse: device is a pointer
[    63.072] (II) event2  - Logitech USB-PS/2 Optical Mouse: device removed
[    63.104] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5:1.0/0003:046D:C050.0001/input/input2/event2"
[    63.104] (II) XINPUT: Adding extended input device "Logitech USB-PS/2 Optical Mouse" (type: MOUSE, id 9)
[    63.104] (**) Option "AccelerationScheme" "none"
[    63.104] (**) Logitech USB-PS/2 Optical Mouse: (accel) selected scheme none/0
[    63.104] (**) Logitech USB-PS/2 Optical Mouse: (accel) acceleration factor: 2.000
[    63.104] (**) Logitech USB-PS/2 Optical Mouse: (accel) acceleration threshold: 4
[    63.164] (II) event2  - Logitech USB-PS/2 Optical Mouse: is tagged by udev as: Mouse
[    63.164] (II) event2  - Logitech USB-PS/2 Optical Mouse: device set to 1000 DPI
[    63.164] (II) event2  - Logitech USB-PS/2 Optical Mouse: device is a pointer
[    63.165] (II) config/udev: Adding input device Logitech USB-PS/2 Optical Mouse (/dev/input/mouse0)
[    63.165] (II) No input driver specified, ignoring this device.
[    63.165] (II) This device may have been added with another device file.
[    63.165] (II) config/udev: Adding input device HID 046a:0011 (/dev/input/event3)
[    63.165] (**) HID 046a:0011: Applying InputClass "libinput keyboard catchall"
[    63.165] (II) Using input driver 'libinput' for 'HID 046a:0011'
[    63.165] (**) HID 046a:0011: always reports core events
[    63.166] (**) Option "Device" "/dev/input/event3"
[    63.166] (**) Option "_source" "server/udev"
[    63.166] (II) event3  - HID 046a:0011: is tagged by udev as: Keyboard
[    63.166] (II) event3  - HID 046a:0011: device is a keyboard
[    63.166] (II) event3  - HID 046a:0011: device removed
[    63.180] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb3/3-8/3-8:1.0/0003:046A:0011.0002/input/input3/event3"
[    63.180] (II) XINPUT: Adding extended input device "HID 046a:0011" (type: KEYBOARD, id 10)
[    63.180] (**) Option "xkb_model" "pc105"
[    63.180] (**) Option "xkb_layout" "de"
[    63.180] (**) Option "xkb_variant" "nodeadkeys"
[    63.181] (II) event3  - HID 046a:0011: is tagged by udev as: Keyboard
[    63.181] (II) event3  - HID 046a:0011: device is a keyboard
[    63.181] (II) config/udev: Adding input device HDA Intel PCH Front Mic (/dev/input/event5)
[    63.181] (II) No input driver specified, ignoring this device.
[    63.181] (II) This device may have been added with another device file.
[    63.181] (II) config/udev: Adding input device HDA Intel PCH Rear Mic (/dev/input/event6)
[    63.181] (II) No input driver specified, ignoring this device.
[    63.181] (II) This device may have been added with another device file.
[    63.182] (II) config/udev: Adding input device HDA Intel PCH Line (/dev/input/event7)
[    63.182] (II) No input driver specified, ignoring this device.
[    63.182] (II) This device may have been added with another device file.
[    63.182] (II) config/udev: Adding input device HDA Intel PCH Line Out (/dev/input/event8)
[    63.182] (II) No input driver specified, ignoring this device.
[    63.182] (II) This device may have been added with another device file.
[    63.182] (II) config/udev: Adding input device HDA Intel PCH Front Headphone (/dev/input/event9)
[    63.182] (II) No input driver specified, ignoring this device.
[    63.182] (II) This device may have been added with another device file.
[    63.188] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): connected
[    63.188] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): Internal DisplayPort
[    63.188] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): 960.0 MHz maximum pixel clock
[    63.188] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): supports NVIDIA 3D Vision stereo.
[    63.188] (--) NVIDIA(GPU-0): 
[   165.138] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): connected
[   165.138] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): Internal DisplayPort
[   165.138] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): 960.0 MHz maximum pixel clock
[   165.138] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): supports NVIDIA 3D Vision stereo.
[   165.138] (--) NVIDIA(GPU-0): 
[   165.138] (--) NVIDIA(GPU-0): DFP-0: disconnected
[   165.138] (--) NVIDIA(GPU-0): DFP-0: Internal DisplayPort
[   165.138] (--) NVIDIA(GPU-0): DFP-0: 960.0 MHz maximum pixel clock
[   165.138] (--) NVIDIA(GPU-0): 
[   165.138] (--) NVIDIA(GPU-0): DFP-1: disconnected
[   165.138] (--) NVIDIA(GPU-0): DFP-1: Internal TMDS
[   165.138] (--) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
[   165.138] (--) NVIDIA(GPU-0): 
[   165.138] (--) NVIDIA(GPU-0): DFP-2: disconnected
[   165.138] (--) NVIDIA(GPU-0): DFP-2: Internal DisplayPort
[   165.138] (--) NVIDIA(GPU-0): DFP-2: 960.0 MHz maximum pixel clock
[   165.138] (--) NVIDIA(GPU-0): 
[   165.139] (--) NVIDIA(GPU-0): DFP-3: disconnected
[   165.139] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS
[   165.139] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock
[   165.139] (--) NVIDIA(GPU-0): 
[   165.139] (--) NVIDIA(GPU-0): DFP-4: disconnected
[   165.139] (--) NVIDIA(GPU-0): DFP-4: Internal DisplayPort
[   165.139] (--) NVIDIA(GPU-0): DFP-4: 960.0 MHz maximum pixel clock
[   165.139] (--) NVIDIA(GPU-0): 
[   165.139] (--) NVIDIA(GPU-0): DFP-5: disconnected
[   165.139] (--) NVIDIA(GPU-0): DFP-5: Internal TMDS
[   165.139] (--) NVIDIA(GPU-0): DFP-5: 165.0 MHz maximum pixel clock
[   165.139] (--) NVIDIA(GPU-0): 
[   165.139] (--) NVIDIA(GPU-0): DFP-6: disconnected
[   165.139] (--) NVIDIA(GPU-0): DFP-6: Internal DisplayPort
[   165.139] (--) NVIDIA(GPU-0): DFP-6: 960.0 MHz maximum pixel clock
[   165.139] (--) NVIDIA(GPU-0): 
[   165.139] (--) NVIDIA(GPU-0): DFP-7: disconnected
[   165.139] (--) NVIDIA(GPU-0): DFP-7: Internal TMDS
[   165.139] (--) NVIDIA(GPU-0): DFP-7: 165.0 MHz maximum pixel clock
[   165.139] (--) NVIDIA(GPU-0): 
[   165.765] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): connected
[   165.765] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): Internal DisplayPort
[   165.765] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): 960.0 MHz maximum pixel clock
[   165.765] (--) NVIDIA(GPU-0): Ancor Communications Inc ASUS VG278HR (DFP-2.2): supports NVIDIA 3D Vision stereo.
[   165.765] (--) NVIDIA(GPU-0): 
[   165.765] (--) NVIDIA(GPU-0): DFP-0: disconnected
[   165.765] (--) NVIDIA(GPU-0): DFP-0: Internal DisplayPort
[   165.765] (--) NVIDIA(GPU-0): DFP-0: 960.0 MHz maximum pixel clock
[   165.765] (--) NVIDIA(GPU-0): 
[   165.765] (--) NVIDIA(GPU-0): DFP-1: disconnected
[   165.765] (--) NVIDIA(GPU-0): DFP-1: Internal TMDS
[   165.766] (--) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
[   165.766] (--) NVIDIA(GPU-0): 
[   165.766] (--) NVIDIA(GPU-0): DFP-2: disconnected
[   165.766] (--) NVIDIA(GPU-0): DFP-2: Internal DisplayPort
[   165.766] (--) NVIDIA(GPU-0): DFP-2: 960.0 MHz maximum pixel clock
[   165.766] (--) NVIDIA(GPU-0): 
[   165.766] (--) NVIDIA(GPU-0): DFP-3: disconnected
[   165.766] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS
[   165.766] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock
[   165.767] (--) NVIDIA(GPU-0): 
[   165.767] (--) NVIDIA(GPU-0): DFP-4: disconnected
[   165.767] (--) NVIDIA(GPU-0): DFP-4: Internal DisplayPort
[   165.767] (--) NVIDIA(GPU-0): DFP-4: 960.0 MHz maximum pixel clock
[   165.767] (--) NVIDIA(GPU-0): 
[   165.767] (--) NVIDIA(GPU-0): DFP-5: disconnected
[   165.767] (--) NVIDIA(GPU-0): DFP-5: Internal TMDS
[   165.767] (--) NVIDIA(GPU-0): DFP-5: 165.0 MHz maximum pixel clock
[   165.767] (--) NVIDIA(GPU-0): 
[   165.767] (--) NVIDIA(GPU-0): DFP-6: disconnected
[   165.767] (--) NVIDIA(GPU-0): DFP-6: Internal DisplayPort
[   165.767] (--) NVIDIA(GPU-0): DFP-6: 960.0 MHz maximum pixel clock
[   165.767] (--) NVIDIA(GPU-0): 
[   165.767] (--) NVIDIA(GPU-0): DFP-7: disconnected
[   165.767] (--) NVIDIA(GPU-0): DFP-7: Internal TMDS
[   165.767] (--) NVIDIA(GPU-0): DFP-7: 165.0 MHz maximum pixel clock
[   165.767] (--) NVIDIA(GPU-0):

We use KDE for historical reasons, if needed, I try to bribe my collegues to use something different.
Would be as easy as bathing the cat…

Kind regards,

Nicolai

Option         "nvidiaXineramaInfoOrder" "DFP-6.2"

should be

Option         "nvidiaXineramaInfoOrder" "DFP-2.2"

but this doesn’t matter.
Apart from that, the config looks correct, the log doesn’t show errors.
Astonishing that KDE now works again with compositing disabled, that was broken in the meantime. Maybe just KDE’s monitor manager confuses everything. Please disable the kscreen2 service in the KDE control center and see if that helps.

Dear generix,

sorry for the wait, I am back at work now and tried your suggestions.
It is still flickering…
Do you think I should try uninstalling KDE and try xfce instead?
Or can a DP to Duallink-DVI adapter cause these problem?

Kind regards,

Nicolai

can a DP to Duallink-DVI adapter cause these problem?
It can but it shouldn’t and since the hardware and driver didn’t change from the previous 14.04 install, I don’t think so.
Do you think I should try uninstalling KDE and try xfce instead?
No need to uninstall, you should be able to just install it and then set the session type on the login or manually in
/var/lib/AccountsService/users/username
to a session from
/usr/share/xsessions
To rule things out, you’ll have to check with another DE, I’m afraid.