(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[    15.968] (EE) AIGLX: reverting to software rendering
[    16.883] (EE) RADEON(0): drmmode_do_crtc_dpms cannot get last vblank counter
[  2284.806] (EE) RADEON(0): drmmode_do_crtc_dpms cannot get last vblank counter
[  3684.657] (EE) RADEON(0): drmmode_do_crtc_dpms cannot get last vblank counter
[ 11909.280] (EE) RADEON(0): drmmode_do_crtc_dpms cannot get last vblank counter