I have following kernel (3.7.10-1.1) messages ---------------------------------------from /var/log/messages----------------------------------------- ... 2013-07-04T01:43:43.666022+04:00 c6ws4 kernel: [    0.421559] pci 0000:00:01.0: BAR 15: can't assign mem pref (size 0x18000000) 2013-07-04T01:43:43.666024+04:00 c6ws4 kernel: [    0.421563] pci 0000:00:01.0: BAR 14: assigned [mem 0xe1000000-0xe1ffffff] 2013-07-04T01:43:43.666025+04:00 c6ws4 kernel: [    0.421566] pci 0000:00:16.1: BAR 0: assigned [mem 0xe0001000-0xe000100f 64bit] 2013-07-04T01:43:43.666026+04:00 c6ws4 kernel: [    0.421576] pci 0000:01:00.0: BAR 1: can't assign mem pref (size 0x10000000) 2013-07-04T01:43:43.666027+04:00 c6ws4 kernel: [    0.421579] pci 0000:01:00.0: BAR 3: can't assign mem pref (size 0x2000000) 2013-07-04T01:43:43.666027+04:00 c6ws4 kernel: [    0.421581] pci 0000:01:00.0: BAR 0: assigned [mem 0xe1000000-0xe1ffffff] 2013-07-04T01:43:43.666028+04:00 c6ws4 kernel: [    0.421584] pci 0000:01:00.0: BAR 6: can't assign mem pref (size 0x80000) 2013-07-04T01:43:43.666029+04:00 c6ws4 kernel: [    0.421586] pci 0000:00:01.0: PCI bridge to [bus 01] ... ----------------------------------------------------------------------------------------------- This messages are for PCE-E GPU, see lspci -v extraction : 01:00.0 3D controller: NVIDIA Corporation GK107 [Tesla K20c] (rev a1)         Subsystem: NVIDIA Corporation Device 0982         Flags: fast devsel, IRQ 11         Memory at e1000000 (32-bit, non-prefetchable) [disabled] [size=16M]         Memory at <unassigned> (64-bit, prefetchable) [disabled]         Memory at <unassigned> (64-bit, prefetchable) [disabled]         Does this kernel messages above means that I have hardware/BIOS problems ? ( the corresponding NVIDIA driver installation says that PCI I/O region assigned to GPU device is invalid, but this may be driver error). Mikhail N�����r��y隊Z)z{.���w���칻�&ޢ��������'��-���w�zf���^�ˬzG���~� ޮ�^�ˬz��