This issue is fixed in 16.10 where the screen is turned on with black background and shows a blurry cursor. Since support for powerpc has been dropped from 17.04 on and will be continued for updates in 16.04 only, it doesn't make sense to pursue this issue any further.
This issue is fixed in 16.10 where the screen is turned on with black background and shows a blurry cursor. Since support for powerpc has been dropped from 17.04 on and will be continued for updates in 16.04 only, it doesn't make sense to pursue this issue any further.