Have been running BOINC with a GeForce GTS450 GPU for some time under earlier Ubuntu versions and and has always run OpenCL flawlessly. I've just done an online upgrade to 14.04 and now BOINC log tells me "...needs OpenCL but GPU doesn't support it". Same result with darktable. Driver version is 304.117. Anyone know the reason why this should suddenly happen, or how it can be fixed? Just to be clear, the upgrade is all I've done, I haven't changed anything else.