[DESKTOP] After install second monitor, I have this error before suspend

[wonder]

Hello.

I have kubuntu 20.04 full updated.
All ok, a few weeks ago, I install second monitor, all fine but, when I go to suspend computer, appears this error message:

drm:btc_dpm_set_power_state [radeon] *error* rv770_restrict_performance_levels_before_switch failed

Appears some seconds and then, the computer suspend well.

Not any problem, only appears this error, but I don't linke appears the error because, I don't know what are the cause.

I search info about this, appears similars errors since lot years ago.

I don't know how search more info about this.

Thanks and regards.