I have this same black screen issue with one of my computers. The only one with an Nvidia graphics card, specifically GeForce GTX 680. I can confirm that the latest Solus Budgie ISO is unusable with this computer. And the Solus Budgie I have installed on this computer long time ago, but now after updating it, now boots to either a black screen with mouse cursor or a black screen without mouse cursor. And only when I have the cursor I can switch to a TTY. Installing nvidia-glx-driver-32bit nvidia-glx-driver-common nvidia-glx-driver-current nvidia-glx-driver-modaliases did not help. Thats when I lost the mouse cursor, so it made things even worse. Please make a new ISO so I can enjoy Solus Budgie again with this computer also.