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2014-12-28 13:28:03 -0500 answered a question Mouse problems fedora 21

I had the same problem. I think the problem is with the second discrete nvidia gpu (nvidia optimus technology). I have the nvidia GeForce GT 520MX card. A known problem with these cards is having a VGA port as connected, when that is not the case (type xrandron your terminal to check that there is a VGA-1-2 or VGA-1-1 connected). For the rest of this answer I assume we have VGA-1-2. You can change the commands accordingly in case of VGA-1-1. For more information about this check this freedesktop entry.

This page suggests to add video=VGA-2:d to the kernel command line in case xrandr gave VGA-1-2 as connected ( video=VGA-1:d in case of VGA-1-1). This solution didn't work for me. Nor just disabling the second VGA by the Settings GUI (the VGA continued to appear). Not even using xrandr --output VGA-1-2 --off. You can try these solutions first and check if they work for your case.

A workaround that worked for me was to add a conf file to /etc/X11/xorg.conf.d/ and just disable the VGA display with this code:

Section "Monitor"
    Identifier "VGA-1-2"
    Option "Ignore" "true"
    Option "Enable" "false"

I am not an expert, and I think a more clever solution can be found because with this workaround the VGA port of the discrete card is disabled (if there is actual any), and I don't know if the VGA port of my laptop connects with the integrated card or the discrete card (I don't care, because I don't use it :). Until that time this workaround should suffice. I can't upload my .conf file because I don't have enough karma (this is my first answer).

Also installing the nvidia proprietary drivers (through rpmfusion or by installing bumblebee or use the nvidia official site) solves this problem.

2014-12-25 15:41:05 -0500 commented question Mouse problems fedora 21

Fresh install of Fedora 21. No tweaking. I can confirm the same problems.