I'm seeing this too. Clean install of 11.10 on a ThinkPad T520 (SandyBridge chip).
Using a vanilla GNOME 3 session (No Unity, no compiz) - same symptoms: X hangs but machine is otherwise OK.
Alexandre mentioned VMWare... For me, this is semi-reliably reproducible by running 3D applications in a Windows 7 guest using VMWare workstation. Forcing S3TC texture compression to enabled is necessary to get 3D acceleration in guests, which may be relevant...?
Let me know if there's anything I can do to help move this forward.
I'm seeing this too. Clean install of 11.10 on a ThinkPad T520 (SandyBridge chip).
Using a vanilla GNOME 3 session (No Unity, no compiz) - same symptoms: X hangs but machine is otherwise OK.
Alexandre mentioned VMWare... For me, this is semi-reliably reproducible by running 3D applications in a Windows 7 guest using VMWare workstation. Forcing S3TC texture compression to enabled is necessary to get 3D acceleration in guests, which may be relevant...?
Let me know if there's anything I can do to help move this forward.