Xorg 1.16.4 and multimedia keys

[deloptes]

Hi,
I have a problem after recent upgrade from debian wheezy to jessie, because
of hardware replacement. The goal was to get a newer Xorg server version
that would support the intel graphic controller on Dell e5440.

After the upgrade the multimedia keys on the notebook are working but the
multimedia keys on the external usb keyboard are not. They even not
register in xev as suggested to test in several forums.

I already tried 105key and latitude in /etc/defaults/keyboard and xorg.conf
but with no success. When searching in google on "a4techKB21" I found this
http://osdir.com/ml/debian-bugs-dist/2011-05/msg00724.html
which describes similar (I would say 95%) to my issue.

I use custom build 3.19 kernel - see below for other details

How could I solve this problem?

Thank you in advance


Some information on the system

$ Xorg -version

X.Org X Server 1.16.4
Release Date: 2014-12-20
X Protocol Version 11, Revision 0
Build Operating System: Linux 3.16.0-4-amd64 x86_64 Debian
Current Operating System: Linux maistor 3.19.2eko4 #2 SMP Thu Mar 26
23:50:33 CET 2015 x86_64
Kernel command line: BOOT_IMAGE=/vmlinuz-3.19.2eko4
root=/dev/mapper/G300-root ro oops=panic printk.time=1 splash
memory_corruption_check=1 quiet
Build Date: 11 February 2015  12:32:02AM
xorg-server 2:1.16.4-1 (http://www.debian.org/support)
Current version of pixman: 0.32.6
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.

$ lsusb
Bus 003 Device 003: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 003 Device 002: ID 8087:8000 Intel Corp.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 413c:2513 Dell Computer Corp. internal USB Hub of
E-Port Replicator
Bus 001 Device 007: ID 0d62:a100 Darfon Electronics Corp. Optical Mouse
Bus 001 Device 006: ID 0471:2036 Philips (or NXP) Webcam SPC1030NC
Bus 001 Device 005: ID 04d9:1503 Holtek Semiconductor, Inc. Shortboard Lefty
Bus 001 Device 004: ID 03f3:0081 Adaptec, Inc.
Bus 001 Device 002: ID 413c:2513 Dell Computer Corp. internal USB Hub of
E-Port Replicator
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub