Hi,
I have a Dell UP2414Q UHD display attached with DP cable to a GTX680, using driver 346.47 on ArchLinux (x86_64). Excerpt from the xorg.conf file:
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "SLI" "Off"
Option "MultiGPU" "Off"
Option "BaseMosaic" "off"
# See https://devtalk.nvidia.com/default/topic/681356/linux/can-t-enable-60hz-with-display-dell-up2414q-/?offset=4#4111391
Option "TwinView"
Option "NoTwinViewXineramaInfo" "1"
Option "metamodes" "DFP-4.9: 1920x2160 { ViewPortIn=1920x2160 }, DFP-4.8: 1920x2160 { ViewPortIn=1920x2160 }; DFP-4.9: 1920x2160 { ViewPortIn=1280x1440 }, DFP-4.8: 1920x2160 { ViewPortIn=1280x1440 }; DFP-4.9: 1920x2160 { ViewPortIn=960x1080 }, DFP-4.8: 1920x2160 { ViewPortIn=960x1080}; DFP-4.9: 1280x1440 { ViewPortIn=1280x1440 }, DFP-4.8: 1280x1440 { ViewPortIn=1280x1440 }; DFP-4.9: 960x1080 { ViewPortIn=960x1080 }, DFP-4.8: 960x1080 { ViewPortIn=960x1080}; DFP-4.9: 2560x1440 { ViewPortIn=2560x1440 }, NULL; DFP-4.9: 1920x1080 { ViewPortIn=1920x1080 }, NULL; DFP-4.9: 1920x1080_120 { ViewPortIn=1920x1080 }, NULL"
Option "ConnectedMonitor" "DFP-4.9, DFP-4.8"
Option "TwinViewOrientation" "LeftOf"
SubSection "Display"
Depth 24
EndSubSection
EndSection
The screen mostly works fine in this setup. There used to be an issue that a screensaver-locked session would unlock with only one half of the screen working (the other staying black), but that seems to have disappeared with a recent driver update.
The one issue I still see is the fact that the left and right halfs of the screen are not synchronized correctly. This is most visible when scrolling a webpage in e.g. Firefox or moving a window vertically. There’s major screen-tearing in this case.
Is this due to the use of twinview? Any way to fix this?
Paul
nvidia-bug-report.log.gz (188 KB)