Comment 106 for bug 1735594

exact same problem with my HP EliteBook

running ubuntu 16.04

1. $sudo lshw -c video
[sudo] password for user:
  *-display
       description: VGA compatible controller
       product: Whistler [Radeon HD 6730M/6770M/7690M XT]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:01:00.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=radeon latency=0
       resources: irq:40 memory:c0000000-cfffffff memory:d4400000-d441ffff ioport:4000(size=256) memory:d4440000-d445ffff

2. $lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.4 LTS
Release: 16.04
Codename: xenial

3. $apt policy xserver-xorg-core
xserver-xorg-core:
  Installed: 2:1.18.4-0ubuntu0.7
  Candidate: 2:1.18.4-0ubuntu0.7
  Version table:
 *** 2:1.18.4-0ubuntu0.7 500
        500 http://ubuntu.unitedcolo.de/ubuntu xenial-updates/main amd64 Packages
        500 http://ubuntu.unitedcolo.de/ubuntu xenial-security/main amd64 Packages
        100 /var/lib/dpkg/status
     2:1.18.3-1ubuntu2 500
        500 http://ubuntu.unitedcolo.de/ubuntu xenial/main amd64 Packages

4. $apt policy libgl1-mesa-dri
libgl1-mesa-dri:
  Installed: 17.2.8-0ubuntu0~16.04.1
  Candidate: 17.2.8-0ubuntu0~16.04.1
  Version table:
 *** 17.2.8-0ubuntu0~16.04.1 500
        500 http://ubuntu.unitedcolo.de/ubuntu xenial-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     11.2.0-1ubuntu2 500
        500 http://ubuntu.unitedcolo.de/ubuntu xenial/main amd64 Packages

when i run unity i get

$unity
compizconfig - Info: Backend : gsettings
compizconfig - Info: Integration : true
compizconfig - Info: Profile : unity-lowgfx

(process:5239): GLib-GIO-WARNING **: g_settings_set_value: value for key 'visual-bell-type' in schema 'org.gnome.desktop.wm.preferences' is outside of valid range
Switched to profile 'unity' (for environment 'ubuntu')
compizconfig - Info: Backend : gsettings
compizconfig - Info: Integration : true
compizconfig - Info: Profile : unity
unity-panel-service stop/waiting
unity-panel-service start/running, process 5269
start: Job failed to start

i'm clueless what to do

thx