Boinc 7.16.17
Windows 10 Pro build 2004, 19041.450, Windows Feature Experience Pakc 120.2212.31.0
On various computers I have, same build of windows and boinc, same account and projects, project specific graphics are loading in the screensaver just fine.

In one PC, I wasn't getting screensaver graphics because it didn't have a GPU (using onboard graphics). I've then installed a Gigabyte Silent GT1030 2GB GPU card into this PC. On first boot, couldn't click the 'graphics' in Boinc, the buttons were greyed out.

I installed the latest Nvidia driver from the Gibabyte website specific for the card (v300 series), checked for firmware updates to the card (none), then installed the latest Nvidia driver for this type of card from the Nvidia website (v400 series).

GPU-Z detects the card and confirms it has OpenGL support, DirectX, CUDA, this and that. Seems fairly fully featured (for it's price point, anyway) but more to the point certainly capable of BOINC graphics.

BOINC graphics now load when I click on any projects running task and click the Graphics button; all good there.

In terms of the screensaver, it will load the standard BOINC screensaver, but regardless of the screensaver settings will never load the project specific screensavers. This is the only PC I'd really like the screensaver to load on, for my home theatre PC, and for it to be a talking point when guests visit.

I've tried uninstalling and reinstalling Nvidia drivers, uninstalling and reinstalling BOINC, check for windows updates, disabling all security software, reinstalling boinc whilst disabled, tried everything and still no luck. Any suggestions?

Further to the above, I noticed last night that PrimeGrid was utilising the GPU fine for computation.

However, today, after uninstalling and reinstalling BOINC again, and removing and readding PrimeGrid, it is saying: GPU missing, Ready to start (0.0247 CPUs + 1 NVIDIA GPU) at 0% (a new task sent to me).

So there may well be an issue with BOINC accessing the GPU. Now my Rosetta tasks cannot 'Show Graphics', whereas yesterday that was working, although the World Community Grid can show graphics still.

Either way, the screensaver was not working for WCG project graphics, when I had removed all projects except for World Community Grid, which does not use graphics. The screensaver only ever just gives the BOINC green progress bars of the running tasks.

Is there something I can do to uninstall BOINC, wipe out all memory of allocated GPUs/GPU drivers, and reinstall BOINC?

Thanks in advance! :)

Good news! My issue is resolved. Once I realised that something funny was going on with the drivers, I looked for that issue of GPU in general not working. Found another support thread which referred to another thread which referred to another thread, where a user suggested DDU (Display Driver Uninstaller). I ran DDU, reinstalled, and problem resolved. Screensaver is working for project specific graphics!

Howevveerrr..... PrimeGrid is still not detecting the GPU. But this is not relevant to my original post, so consider this thread resolved.

Thanks forum, for being a good bouncing board :)

In case anyone ever reads this, the DDU was coincidentally utilised with fresh driver installation when my VPN had dropped out. It turns out, the VPN connection prevented the screensaver from using project specific graphics. So strange, yet 100% repeatable.