kde ignores Option "Emulate3Buttons" "no" from xorg When the two mouse buttons are pressed this still emulates the middle bottom Reproducible: Always Steps to Reproduce: Press left mouse button + right one
KDE does have no mouse button emulation code. Please ask in the forum of your distribution which configuration could cause this issue.
mv .kde kde-backup and starting kde with a new user didn't fix the problem, seems it's a built-in kde problem, my xorg.conf: # nvidia-settings: X configuration file generated by nvidia-settings # nvidia-settings: version 295.59 (buildmeister@swio-display-x86-rhel47-03.nvidia.com) Wed Jun 6 22:23:02 PDT 2012 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 "ZAxisMapping" "4 5" Option "Emulate3Buttons" "false" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor0" VendorName "Unknown" ModelName "HP L200b" HorizSync 30.0 - 83.0 VertRefresh 56.0 - 75.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GTX 580" Option "ColorSpace" "YCbCr444" EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "TwinView" "1" Option "TwinViewXineramaInfoOrder" "DFP-1" Option "metamodes" "CRT: nvidia-auto-select +1920+0, DFP: nvidia-auto-select +0+0" SubSection "Display" Depth 24 EndSubSection EndSection Also I tried "no" and removing Emulate3Buttons option and still doesn't fix Gnome-shell and ubuntu unity doesn't enable buttons emulation this only happens with kde.
Please do not reopen, unless you point me to the source code line where KDE messes with button emulation. I checked the sources previously, and there is nothing in KDE that tries to enable, workaround, or disable X11 button emulation, or even implements it itself. Please check with the providers of your distribution.