evdev_drv.so cannot find libevdev.so even though it is installed and shows up in ldconfig

udiboy1209 · 10-12-2017, 02:47 PM

I recently installed XFCE on my LFS 8.0 distro, following the BLFS guide.

I installed the Xorg drivers "xf86-input-evdev" and "libevdev" successfully,
But when running startx, the xfce desktop shows up, but both the mouse and keyboard are unresponsive. The keyboard works properly before starting xfce, and I have checked output using `cat /dev/input/mice` which responds on touch.

The Xorg.0.log file shows that evdev_drv.so cannot find libevdev.so.2:

Code:

[  1372.078] (II) LoadModule: "evdev"
[  1372.078] (II) Loading /usr/X11/lib/xorg/modules/input/evdev_drv.so
[  1372.078] (EE) Failed to load /usr/X11/lib/xorg/modules/input/evdev_drv.so: libevdev.so.2: cannot open shared object file: No such file or directory
[  1372.078] (II) UnloadModule: "evdev"
[  1372.078] (II) Unloading evdev
[  1372.078] (EE) Failed to load module "evdev" (loader failed, 7)
[  1372.078] (EE) No input driver matching `evdev'

This is the output of `ldconfig -p | grep evdev`

Code:

	libevdev.so.2 (libc6,x86-64) => /usr/X11/lib/libevdev.so.2
	libevdev.so (libc6,x86-64) => /usr/X11/lib/libevdev.so

Both the library files are present in the said locations, and "/usr/X11/lib" is present in LIBRARY_PATH too. Why can't "evdev_drv" load "libevdev"?

Should I fall back to "libinput"? I have read that it is not recommended on modern hardware.

business_kid · 10-13-2017, 11:47 AM

A favourite reason for that is 32 bit files on 64 bit systems, or vice versa.

Check that with 'file' command.

hazel · 10-13-2017, 11:55 AM

Did you carry out all the instructions in the section "Introduction to Xorg-7"? There are some specific paragraphs there for users who are using an XORG prefix other than /usr.

udiboy1209 · 10-13-2017, 01:00 PM

Quote:

A favourite reason for that is 32 bit files on 64 bit systems, or vice versa.

I rebuilt both modules from Ubuntu using chroot, and then rebooted into LFS and xfce started working.
I had rebuilt before viewing this thread so I couldn't check with 'file', but I remember that I had built 'evdev' from LFS and not in chroot.
Would that lead to 32-bit library being built? I will check once I reboot into LFS by building again.

Quote:

Did you carry out all the instructions in the section "Introduction to Xorg-7"?

Yes I had the $XORG_CONFIG and $XORG_PREFIX variables set correctly, and I had made all changes listed there.

hazel · 10-13-2017, 01:19 PM

Quote:

Originally Posted by udiboy1209

I rebuilt both modules from Ubuntu using chroot, and then rebooted into LFS and xfce started working.
I had rebuilt before viewing this thread so I couldn't check with 'file', but I remember that I had built 'evdev' from LFS and not in chroot.
Would that lead to 32-bit library being built? I will check once I reboot into LFS by building again.

It shouldn't. LFS (as against CLFS) can't build a system with a different architecture from the host. And in any case, you can't chroot from a 32-bit system into a 64-bit one or vice versa.

Most people, by the time they get around to building X, are working entirely in the new system. It shouldn't cause any problems.

Krejzi · 10-16-2017, 07:58 AM

You need to add /usr/X11/lib to /etc/ld.so.conf and re-run ldconfig as root.