https://bugs.freedesktop.org/show_bug.cgi?id=72180 --- Comment #39 from Cedric Brandenbourger --- I also have this random GPU lookups on my GT660. I tried to get the proprietary PGRAPH working, but without success. Im'getting an error at boot: Failed to loader firmware with error -2 Fallback to user helper Im'using UEFI on debian jessie. I've tried to howto in this forum -- You are receiving this mail because: You are the assignee for the bug.