Bug 53158 - xf86-input-evdev-2.7.1: Kensington USB Trackball hotplug stopped working with evdev "Couldn't open mtdev device"
Summary: xf86-input-evdev-2.7.1: Kensington USB Trackball hotplug stopped working with...
Status: RESOLVED NOTOURBUG
Alias: None
Product: xorg
Classification: Unclassified
Component: Input/evdev (show other bugs)
Version: 7.7 (2012.06)
Hardware: x86 (IA32) Linux (All)
: medium normal
Assignee: Peter Hutterer
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-08-06 12:00 UTC by Leho Kraav (:macmaN :lkraav)
Modified: 2012-08-08 15:53 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
Xorg.0.log (48.36 KB, text/plain)
2012-08-06 12:00 UTC, Leho Kraav (:macmaN :lkraav) 		no flags Details
View All

Description Leho Kraav (:macmaN :lkraav) 2012-08-06 12:00:33 UTC 
Created attachment 65170 [details]
Xorg.0.log

My USB trackball suddenly started to get killed by mtdev. Initial searches seemed to indicate that http://patchwork.freedesktop.org/patch/11001/ could possibly be the fix. But applying this on top of xf86-input-evdev-2.7.1 has not improved the situation.

Gentoo Linux:
xorg-server-1.12.3
xf86-input-evdev-2.7.1+

Any thoughts?
Comment 1 Leho Kraav (:macmaN :lkraav) 2012-08-06 12:02:38 UTC 
(In reply to comment #0)
> 
> Gentoo Linux:
> xorg-server-1.12.3
> xf86-input-evdev-2.7.1+
> 
> Any thoughts?

Bleh, forgot to mention:

udev-186 (everything worked) -> udev-187 upgrade is also maybe of significance? AFAIK there's some big ruleset /lib -> /usr/lib migration going on, not sure if it's related to this.
Comment 2 Peter Hutterer 2012-08-07 22:15:14 UTC 
there are two separate issues visible here:

[1096217.956] (II) config/udev: Adding input device Kensington      Kensington USB/PS2 Orbit (/dev/input/mouse1)
[1096217.956] (**) Kensington      Kensington USB/PS2 Orbit: Applying InputClass "My Kensington Orbit Trackball"
[1096217.956] (II) Using input driver 'evdev' for 'Kensington      Kensington USB/PS2 Orbit'
[1096217.956] (**) Kensington      Kensington USB/PS2 Orbit: always reports core events
[1096217.956] (**) evdev: Kensington      Kensington USB/PS2 Orbit: Device: "/dev/input/mouse1"
[1096217.956] (EE) evdev: Kensington      Kensington USB/PS2 Orbit: mtdev is (nil)
[1096217.956] (EE) Kensington      Kensington USB/PS2 Orbit: Couldn't open mtdev device
[1096217.967] (EE) evdev: Kensington      Kensington USB/PS2 Orbit: ioctl EVIOCGID failed: Bad file descriptor
[1096217.967] (EE) PreInit returned 8 for "Kensington      Kensington USB/PS2 Orbit"
[1096217.967] (II) UnloadModule: "evdev"

This link provides more info:
http://who-t.blogspot.com.au/2010/11/how-to-ignore-configuration-errors.html

[1096217.970] (II) config/udev: Adding input device Kensington      Kensington USB/PS2 Orbit (/dev/input/event6)
[1096217.970] (**) Kensington      Kensington USB/PS2 Orbit: Applying InputClass "evdev pointer catchall"
[1096217.970] (**) Kensington      Kensington USB/PS2 Orbit: Applying InputClass "My Kensington Orbit Trackball"
[1096217.970] (II) Using input driver 'evdev' for 'Kensington      Kensington USB/PS2 Orbit'
[1096217.970] (**) Kensington      Kensington USB/PS2 Orbit: always reports core events
[1096217.970] (**) evdev: Kensington      Kensington USB/PS2 Orbit: Device: "/dev/input/event6"
[1096217.970] (EE) evdev: Kensington      Kensington USB/PS2 Orbit: mtdev is 0xa242f50
[1096217.970] (--) evdev: Kensington      Kensington USB/PS2 Orbit: Vendor 0x47d Product 0x1022
[1096217.970] (--) evdev: Kensington      Kensington USB/PS2 Orbit: Found 3 mouse buttons
[1096217.970] (--) evdev: Kensington      Kensington USB/PS2 Orbit: Found relative axes
[1096217.970] (--) evdev: Kensington      Kensington USB/PS2 Orbit: Found x and y relative axes
[1096217.970] (II) evdev: Kensington      Kensington USB/PS2 Orbit: Configuring as mouse
[1096217.970] (**) Option "EmulateWheel" "True"
[1096217.970] (**) Option "EmulateWheelButton" "3"
[1096217.970] (**) evdev: Kensington      Kensington USB/PS2 Orbit: YAxisMapping: buttons 4 and 5
[1096217.970] (**) evdev: Kensington      Kensington USB/PS2 Orbit: EmulateWheelButton: 3, EmulateWheelertia: 10, EmulateWheelTimeout: 200
[1096217.970] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/input/input53/event6"
[1096217.970] (II) XINPUT: Adding extended input device "Kensington      Kensington USB/PS2 Orbit" (type: MOUSE, id 10)
[1096217.970] (II) evdev: Kensington      Kensington USB/PS2 Orbit: initialized for relative axes.
[1096217.971] (**) Kensington      Kensington USB/PS2 Orbit: (accel) keeping acceleration scheme 1
[1096217.971] (**) Kensington      Kensington USB/PS2 Orbit: (accel) acceleration profile 0
[1096217.971] (**) Kensington      Kensington USB/PS2 Orbit: (accel) acceleration factor: 2.000
[1096217.971] (**) Kensington      Kensington USB/PS2 Orbit: (accel) acceleration threshold: 4

looks like the device was added successfully here.

[1096217.971] (II) config/udev: removing device Kensington      Kensington USB/PS2 Orbit

And now it's being removed. This comes from the outside, udev is telling us the
device has been removed from the kernel and so we unload it. Since it has the same timestamp as the previous messages, I don't think that's you unplugging the device, I think there is something wrong with your kernel or udev setup.
Comment 3 Leho Kraav (:macmaN :lkraav) 2012-08-08 15:53:12 UTC 
It looks like you are right. After a reboot (to make sure udev is completely sane), the mtdev thing is still a bit funky as in it seems to sometimes get (nil) but then receive a legit value. But AIUI now, even with mtdev failing for whatever reason on Xorg side, mouse should still work. I think it's indeed safe to chalk this one on top of udev's random issues.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.