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Problem: Keyboard Volume up/down keys not work after installation

If I set in keyboard control panel another shortcut for volume up/down (Ctrl+arrows) - this works right.
If I set in keyboard control panel volume up/down keys from my keyboard, this assigned in control panel, but not works, even after restart.

Pre-Diagnosis: No keydown event for volume_up/volume down
Guide: https://wiki.ubuntu.com/Hotkeys/Troubleshooting
System: Recently installed Ubuntu 14.10 x64
Keyboard: Genius GK-110001 (PS/2)

xev application gets only release event (example for vol down):
------------------------------------------------------------------------
FocusOut event, serial 37, synthetic NO, window 0x6400001,
    mode NotifyGrab, detail NotifyAncestor

FocusIn event, serial 37, synthetic NO, window 0x6400001,
    mode NotifyUngrab, detail NotifyAncestor

KeymapNotify event, serial 37, synthetic NO, window 0x0,
    keys:  0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   4   
           0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   

KeyRelease event, serial 37, synthetic NO, window 0x6400001,
    root 0x2eb, subw 0x0, time 77585669, (-285,866), root:(480,918),
    state 0x10, keycode 122 (keysym 0x1008ff11, XF86AudioLowerVolume), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

FocusOut event, serial 37, synthetic NO, window 0x6400001,
    mode NotifyNormal, detail NotifyNonlinear


evtest application report gets all events (vol down press/release and vol up press/release):
-------------------------------------------------------------------------
Event: time 1423744203.723254, type 4 (EV_MSC), code 4 (MSC_SCAN), value ae
Event: time 1423744203.723254, type 1 (EV_KEY), code 114 (KEY_VOLUMEDOWN), value 1
Event: time 1423744203.723254, -------------- SYN_REPORT ------------
Event: time 1423744203.781803, type 4 (EV_MSC), code 4 (MSC_SCAN), value ae
Event: time 1423744203.781803, type 1 (EV_KEY), code 114 (KEY_VOLUMEDOWN), value 0
Event: time 1423744203.781803, -------------- SYN_REPORT ------------
Event: time 1423744204.330757, type 4 (EV_MSC), code 4 (MSC_SCAN), value b0
Event: time 1423744204.330757, type 1 (EV_KEY), code 115 (KEY_VOLUMEUP), value 1
Event: time 1423744204.330757, -------------- SYN_REPORT ------------
Event: time 1423744204.405869, type 4 (EV_MSC), code 4 (MSC_SCAN), value b0
Event: time 1423744204.405869, type 1 (EV_KEY), code 115 (KEY_VOLUMEUP), value 0


RESULT
SCANCODE CURRENT_KEYCODE MEANING
--------------------------------
AE       KEY_VOLUMEDOWN  VOLUME DOWN 
B0       KEY_VOLUMEUP    VOLUME UP


MORE INFO: udev info /dev/input/event2 gets me:
P: /devices/platform/i8042/serio0/input/input2/event2
N: input/event2
S: input/by-path/platform-i8042-serio-0-event-kbd
E: DEVLINKS=/dev/input/by-path/platform-i8042-serio-0-event-kbd
E: DEVNAME=/dev/input/event2
E: DEVPATH=/devices/platform/i8042/serio0/input/input2/event2
E: ID_INPUT=1
E: ID_INPUT_KEY=1
E: ID_INPUT_KEYBOARD=1
E: ID_PATH=platform-i8042-serio-0
E: ID_PATH_TAG=platform-i8042-serio-0
E: ID_SERIAL=noserial
E: MAJOR=13
E: MINOR=66
E: SUBSYSTEM=input
E: USEC_INITIALIZED=8103
E: XKBLAYOUT=us,ru
E: XKBMODEL=pc105
E: XKBOPTIONS=grp:alt_shift_toggle,grp_led:scroll
E: XKBVARIANT=,

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: udev 208-8ubuntu8.2
ProcVersionSignature: Ubuntu 3.16.0-30.40-generic 3.16.7-ckt3
Uname: Linux 3.16.0-30-generic x86_64
ApportVersion: 2.14.7-0ubuntu8.1
Architecture: amd64
CurrentDesktop: Unity
CustomUdevRuleFiles: 60-vboxdrv.rules
Date: Thu Feb 12 23:12:51 2015
InstallationDate: Installed on 2015-02-11 (0 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: Gigabyte Technology Co., Ltd. P67A-D3-B3
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-30-generic root=/dev/mapper/main-root ro quiet splash vt.handoff=7
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/20/2012
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: FE
dmi.board.name: P67A-D3-B3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrFE:bd03/20/2012:svnGigabyteTechnologyCo.,Ltd.:pnP67A-D3-B3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnP67A-D3-B3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: P67A-D3-B3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

** Affects: xserver-xorg-input-evdev (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug utopic
-- 
Keyboard Volume up/down keys not work with pc105
https://bugs.launchpad.net/bugs/1421205
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