After I installed
mesa-utils in order to get rid of the "Unknown Driver" message (see here) I got contradicting info about which driver is actually being used.
"System Settings" says: Gallium 0.4 on llvmpipe (LLVM 0x300), but if I type
lsmod | grep video I find
psb_gfx in the "video" row.
Especially, if Gallium is really being used, how to remove it and fall back to
I'm using an AspireOne 751h with Atom, so processing power is pretty scarce and I'd prefer not to waste it to run a SW emulation of a GPU.