Comment 17 for bug 743861

This also affect me as 2011/05/06, I'm on a AMD64 x2 cpu with a Nvidia GTS 450 card. I'm getting random complete system freeze while using Unity, sometimes It will work fine even up to a day of uptime, sometimes it crash within few minutes or few hours and for no apparent reasons. No system freeze whatsoever using Ubuntu Classic and I have been using Ubuntu on this same machine since 8.04 and this only happen while using the Unity desktop.