In the screen blur kernel syslog, it show below error which 16.04.5 GA kernel don't have this error:
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Aug 21 10:25:50 kernel: [ 0.589408] ACPI Exception: Could not find/resolve named package element: LNKA (20170831/dspkginit-381)
(repeated 942 lines)
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In the screen blur kernel syslog, it show below error which 16.04.5 GA kernel don't have this error: dspkginit- 381)
...
Aug 21 10:25:50 kernel: [ 0.589408] ACPI Exception: Could not find/resolve named package element: LNKA (20170831/
(repeated 942 lines)
...