That warning might indeed correlate with some flicker:
[2017-02-23 16:18:58.483124] <WARNING> mesa-kms: drmModeCrtcSetGamma failed: Invalid argument
That warning might indeed correlate with some flicker:
[2017-02-23 16:18:58.483124] <WARNING> mesa-kms: drmModeCrtcSetGamma failed: Invalid argument