Comment 31 for bug 1319589

Same issue occurs with Radeon HD 4550 (RV710) using kernel 3.13 with Ubuntu 14.04. Resuming from Suspend boots to less than optimal graphics state. A reboot will return normal functionality.

dmesg | grep power returns familiar output but with the these error lines:

[ 1420.560438] [drm:rv730_stop_dpm] *ERROR* Could not force DPM to low

[1421.764025] [drm:rv770_dpm_set_power_state] *ERROR* rv770_set_sw_state failed