UBUNTU 16.04 (64 bit) with AMDGPU-PRO-16.50-362463 generates continuous stream of system errors

Noticed a change on my 16.04 (64 bit) rig running Unity. Examined syslog and xorg.0.log and noted an almost continuous stream of errors being logged.

Sample log file output... For syslog:

Dec 31 10:08:08 XXLOWS01 kernel: [  268.882697] [drm:amdgpu_crtc_page_flip] crtc:0[ffff880210294000], pflip_stat:AMDGPU_FLIP_PENDING, work: ffff8800d73c5cc0,
Dec 31 10:08:08 XXLOWS01 kernel: [  268.883451] [drm:dm_page_flip] dm_page_flip Flipping to hi: 0x0, low: 0xfb810000 
Dec 31 10:08:08 XXLOWS01 kernel: [  268.883456] [drm:amdgpu_flip_work_func] crtc:0[ffff880210294000], pflip_stat:AMDGPU_FLIP_SUBMITTED, work: ffff8800d73c5cc0,
Dec 31 10:08:08 XXLOWS01 kernel: [  268.887753] [drm:dm_pflip_high_irq] dm_pflip_high_irq - crtc :0[ffff880210294000], pflip_stat:AMDGPU_FLIP_NONE, work: ffff8800d73c5cc0,
Dec 31 10:08:08 XXLOWS01 kernel: [  268.899866] [drm:drm_mode_addfb2] [FB:76]
Dec 31 10:08:08 XXLOWS01 kernel: [  268.899878] [drm:get_dm_commit_action] crtc_state_flags: enable:1, active:1, planes_changed:1, mode_changed:0,active_changed:0,connectors_changed:0
Dec 31 10:08:08 XXLOWS01 kernel: [  268.899881] [drm:get_dm_commit_action] crtc_state_flags: enable:1, active:1, planes_changed:1, mode_changed:0,active_changed:0,connectors_changed:0
Dec 31 10:08:08 XXLOWS01 kernel: [  268.899886] [drm:get_dm_commit_action] crtc_state_flags: enable:1, active:1, planes_changed:1, mode_changed:0,active_changed:0,connectors_changed:0
Dec 31 10:08:08 XXLOWS01 kernel: [  268.899896] [drm:get_dm_commit_action] crtc_state_flags: enable:1, active:1, planes_changed:1, mode_changed:0,active_changed:0,connectors_changed:0

For xorg.0.log:

[   105.579] (WW) AMDGPU(0): amdgpu_dri2_flip_event_handler: Pageflip completion event has impossible msc 6231 < target_msc 6232
[   105.595] (WW) AMDGPU(0): amdgpu_dri2_flip_event_handler: Pageflip completion event has impossible msc 6232 < target_msc 6233
[   105.787] (WW) AMDGPU(0): amdgpu_dri2_flip_event_handler: Pageflip completion event has impossible msc 6243 < target_msc 6244

Configuration:

Processor: Intel® Core™ i5-2400 CPU @ 3.10GHz × 4
Graphics card: AMD Radeon (TM) RX 460 Graphics
Driver: amdgpu-pro-16.50-362463

I've uninstalled the amdgpu-pro driver successfully and reverted to the standard drivers (no or limited graphics acceleration) and syslog/xorg.0.log errors stopped. I installed the most recent AMDGPU-PRO-16.50-362463 drivers and the log errors returned.

Would like to see if there is anyone out there with a solution (apart switching graphics card architecture).