how many GPUs are you running, and how do you enable coolbits, without running in desktop crashes?
In order to enable coolbits, you need to enable-all-gpus, which crashes my desktop on a MultiGPU system!
 
PS: If you like more of a Windows look, rather than a Mac look, try out Lubuntu.
It's a slightly lighter GUI than Xubuntu, but like it, has access to all the Ubuntu/Debian repositories.
 
I'd also be interested how CUDA works with Boinc, especially with projects that use less than 100% of the GPU's resources.
 

So far I've found that Boinc often uses less than the recommended Wattage of your GPU, which causes the GPU to run in constant peak boost mode (especially when they're running 80Watt tasks on a 160Watt GPU (like an RTX 2060).
 
I truly want to overclock my GPUs, but it appears that some projects utilizing the GPU to the fullest will benefit from it, while others might crash the GPU, or potentially put it in limp mode.
 
Been playing around with the numbers, and for most GPUs, overclocking isn't really necessary.
For GT 1030/GTX 1050s on the other hand, it might be necessary.
 
For Folding, doing so can level your points (from 100% points stock, to 98% points with power cap and overclock); but running at a much lower wattage (RTX 2060/2060Super/2070 all can run nearly identical points at 125Watts; 2070Super/2080 can do the same at 136-144W, 2080Ti (and possibly 2080Super? I don't own one)does the same at ~180W instead of stock.

No overclocking on linux. I don't overclock my GPU's on windows either anymore. I just want the set it and forget it mentality these days.

For boinc you just need the latest client.
I will try and fo a more thorough post when I get home. Do a Google search for ppa and boinc and you will find it, same for graphics drivers. Xubuntu 18.04 is my current distro with current kernel 5.0 with proposed updates enabled.