Что это и как с этим бороться?

 The XKEYBOARD keymap compiler (xkbcomp) reports:
                                                                           > Warning:          Could not resolve keysym XF86BrightnessAuto
                                                                                                                                           > Warning:
Could not resolve keysym XF86DisplayOff
                                        > Warning:          Could not resolve keysym XF86Info
                                                                                              > Warning:          Could not resolve keysym XF86AspectRatio
                                                                                                                                                           > Wa
rning:          Could not resolve keysym XF86DVD
                                                 > Warning:          Could not resolve keysym XF86Audio
                                                                                                        > Warning:          Could not resolve keysym XF86Channe
lUp
    > Warning:          Could not resolve keysym XF86ChannelDown
                                                                 > Warning:          Could not resolve keysym XF86Break
                                                                                                                        > Warning:          Could not resolve k
eysym XF86VideoPhone
                     > Warning:          Could not resolve keysym XF86ZoomReset
                                                                                > Warning:          Could not resolve keysym XF86Editor
                                                                                                                                        > Warning:          Cou
ld not resolve keysym XF86GraphicsEditor
                                         > Warning:          Could not resolve keysym XF86Presentation
                                                                                                       > Warning:          Could not resolve keysym XF86Databas
e
  > Warning:          Could not resolve keysym XF86Voicemail
                                                             > Warning:          Could not resolve keysym XF86Addressbook
                                                                                                                          > Warning:          Could not resolve
 keysym XF86DisplayToggle
                          > Warning:          Could not resolve keysym XF86SpellCheck
                                                                                      > Warning:          Could not resolve keysym XF86ContextMenu
                                                                                                                                                   > Warning:
        Could not resolve keysym XF86MediaRepeat
                                                 > Warning:          Could not resolve keysym XF8610ChannelsUp
                                                                                                               > Warning:          Could not resolve keysym XF8
610ChannelsDown
                > Warning:          Could not resolve keysym XF86Images
                                                                        > Warning:          Could not resolve keysym XF86NotificationCenter
                                                                                                                                            > Warning:
 Could not resolve keysym XF86PickupPhone The XKEYBOARD keymap compiler (xkbcomp) reports:
                                                                           > Warning:          Could not resolve keysym XF86BrightnessAuto
                                                                                                                                           > Warning:
Could not resolve keysym XF86DisplayOff
                                        > Warning:          Could not resolve keysym XF86Info
                                                                                              > Warning:          Could not resolve keysym XF86AspectRatio
                                                                                                                                                           > Wa
rning:          Could not resolve keysym XF86DVD
                                                 > Warning:          Could not resolve keysym XF86Audio
                                                                                                        > Warning:          Could not resolve keysym XF86Channe
lUp
    > Warning:          Could not resolve keysym XF86ChannelDown
                                                                 > Warning:          Could not resolve keysym XF86Break
                                                                                                                        > Warning:          Could not resolve k
eysym XF86VideoPhone
                     > Warning:          Could not resolve keysym XF86ZoomReset
                                                                                > Warning:          Could not resolve keysym XF86Editor
                                                                                                                                        > Warning:          Cou
ld not resolve keysym XF86GraphicsEditor
                                         > Warning:          Could not resolve keysym XF86Presentation
                                                                                                       > Warning:          Could not resolve keysym XF86Databas
e
  > Warning:          Could not resolve keysym XF86Voicemail
                                                             > Warning:          Could not resolve keysym XF86Addressbook
                                                                                                                          > Warning:          Could not resolve
 keysym XF86DisplayToggle
                          > Warning:          Could not resolve keysym XF86SpellCheck
                                                                                      > Warning:          Could not resolve keysym XF86ContextMenu
                                                                                                                                                   > Warning:
        Could not resolve keysym XF86MediaRepeat
                                                 > Warning:          Could not resolve keysym XF8610ChannelsUp
                                                                                                               > Warning:          Could not resolve keysym XF8
610ChannelsDown
                > Warning:          Could not resolve keysym XF86Images
                                                                        > Warning:          Could not resolve keysym XF86NotificationCenter
                                                                                                                                            > Warning:
 Could not resolve keysym XF86PickupPhone