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Moofed

Member

Registered: 2005-03-27

Posts: 5

evdev mouse wierdness

I just ran a `pacman -Syu`.  When I rebooted (it updated my kernel) X wouldn't start any more, compaining about "PreInit returned NULL".  I eventually narrowed this down to evdev not finding my mouse event device, which I have udev setup to create automatically base on id, ala wiki instructions.  X only works now with the evdev device set to '/dev/input/event1'.

On top of that, the tilt buttons on my G5 mouse are now revered.  :evil:

Anyone know what happened?

elasticdog

Member

From: Washington, USA

Registered: 2005-05-02

Posts: 995

Website

Re: evdev mouse wierdness

I think a lot of the stuff in evdev was updated and actually fixed so a lot of the old tweaks to get it working, you don't need to do anymore.  I had a udev rule to always grab the mouse event no matter what number, but found that it too stoped working with the latest release.  I just did what you mentioned and now use <code>/dev/input/event1</code> again.

The tilt-buttons issue is most likely caused by an xmodmap rule somewhere that you might have set.  With my Logitech MX500, I always had to list out 32 buttons (even though there aren't that many) and have the scroll wheel ones switched, but with the new evdev driver, I just let it figure things out and all buttons work just fine.  So you have something for reference, my relevant section of <code>xorg.conf</code> now looks like this:

Section "InputDevice"
        Identifier  "Mouse0"
        Driver      "evdev"
        Option      "Dev Name"       "PS2++ Logitech MX Mouse"
        Option      "Dev Phys"       "isa0060/serio1/input0"
        Option      "Device"         "/dev/input/event1"
        #Option      "Device"         "/dev/input/mx500"
        #Option      "Buttons"        "32"
        #Option      "Buttons"        "10"
        Option      "Resolution"     "800"
        Option      "SampleRate"     "150"
EndSection

You can see what I commented out from before this evdev release.  So remove the unneccessary lines, check to make sure you don't xmodmap the button order anywhere, and you should be set!

Moofed

Member

Registered: 2005-03-27

Posts: 5

Re: evdev mouse wierdness

This is a pretty new install and I know I have't messed with xmodmap recently.  Plus I use just openbox, so its not some DE that is interfering.

The udev from testing doesn't help at all, and neither does chmod a+rw.

My relevent xorg.conf stuff:

Section "InputDevice"
        Identifier      "G5Mouse"
        Driver          "evdev"
        Option          "Device" "/dev/input/event1"
#       Option          "Name" "USB Gaming Mouse"
EndSection

The name option doesn't work either (yes, that is the exact product string).  The problem with the event* devices is I've had them get reordered on reboot sometimes.

isez2001

Member

Registered: 2006-08-24

Posts: 33

Re: evdev mouse wierdness

You could use a Udev rule to make sure the device always shows up at the same place.

I have this stored in /etc/rc.d/udev/local.rules to place my Logitech mouse at /dev/input/event9:

KERNEL=="event*", SYSFS(manufacturer)=="Logitech", SYSFS(product)=="USB RECEIVER", NAME="input/event9", MODE="0644"

I made that rule while following this guide ( http://aarongyes.com/guides/mx1000 ).  There is a very complete Udev guide linked to from that page, but you might not even need it--you can probably figure it out from the mx1000 guide.

Despite what the guide says, you should stick to naming the deivice "event<x>".  Recent versions won't accept other device names.