Re: x86_64 lock-up problems - any ideas?
First, did you try running as user. I doubt that it'll help... but who knows.
Second, can you try an older card? (GF6xxx)
As for the CPU usage, glxgears is a bad benchmark. Weird never the less.
You should have seen ~6000-7000fps on each instance.
DEV-NG: Intel S2600C0, 2xE52658V2, 32GB, 4x2TB, GTX680, F19/x86_64, Dell U2711.
DEV: Intel S5520SC, 2xX5680, 36GB, 5x320GB, GTX550, F19/x86_64, Dell U2711 (^).
SRV: Tyan Tempest i5400XT, 2xE5335, 8GB, 4x2TB, 9800GTX, F19/x86-64, Dell U2412.
LAP: ASUS N56VJ, i7-3630QM, 16GB, 1TB, 635M, F19/x86_64.