Как переключить на дискретную вкарту? ubuntu 12.04

lspci -m
00:00.0 "RAM memory" "NVIDIA Corporation" "MCP61 Host Bridge" -ra1 "ASRock Incorporation" "Device 03e2"
00:01.0 "ISA bridge" "NVIDIA Corporation" "MCP61 LPC Bridge" -ra2 "ASRock Incorporation" "Device 03e1"
00:01.1 "SMBus" "NVIDIA Corporation" "MCP61 SMBus" -ra2 "ASRock Incorporation" "939NF6G-VSTA Board"
00:01.2 "RAM memory" "NVIDIA Corporation" "MCP61 Memory Controller" -ra2 "ASRock Incorporation" "939NF6G-VSTA Board"
00:02.0 "USB controller" "NVIDIA Corporation" "MCP61 USB 1.1 Controller" -ra3 -p10 "ASRock Incorporation" "939NF6G-VSTA Board"
00:02.1 "USB controller" "NVIDIA Corporation" "MCP61 USB 2.0 Controller" -ra3 -p20 "ASRock Incorporation" "939NF6G-VSTA Board"
00:04.0 "PCI bridge" "NVIDIA Corporation" "MCP61 PCI bridge" -ra1 -p01 "" ""
00:05.0 "Audio device" "NVIDIA Corporation" "MCP61 High Definition Audio" -ra2 "ASRock Incorporation" "Device 0397"
00:06.0 "IDE interface" "NVIDIA Corporation" "MCP61 IDE" -ra2 -p8a "ASRock Incorporation" "939NF6G-VSTA Board"
00:07.0 "Bridge" "NVIDIA Corporation" "MCP61 Ethernet" -ra2 "ASRock Incorporation" "939NF6G-VSTA Board"
00:08.0 "IDE interface" "NVIDIA Corporation" "MCP61 SATA Controller" -ra2 -p85 "ASRock Incorporation" "939NF6G-VSTA Board"
00:08.1 "IDE interface" "NVIDIA Corporation" "MCP61 SATA Controller" -ra2 -p85 "ASRock Incorporation" "939NF6G-VSTA Board"
00:09.0 "PCI bridge" "NVIDIA Corporation" "MCP61 PCI Express bridge" -ra2 "" ""
00:0b.0 "PCI bridge" "NVIDIA Corporation" "MCP61 PCI Express bridge" -ra2 "" ""
00:0c.0 "PCI bridge" "NVIDIA Corporation" "MCP61 PCI Express bridge" -ra2 "" ""
00:0d.0 "VGA compatible controller" "NVIDIA Corporation" "C61 [GeForce 7025 / nForce 630a]" -ra2 "ASRock Incorporation" "Device 03d6"
00:18.0 "Host bridge" "Advanced Micro Devices [AMD]" "K8 [Athlon64/Opteron] HyperTransport Technology Configuration" "" ""
00:18.1 "Host bridge" "Advanced Micro Devices [AMD]" "K8 [Athlon64/Opteron] Address Map" "" ""
00:18.2 "Host bridge" "Advanced Micro Devices [AMD]" "K8 [Athlon64/Opteron] DRAM Controller" "" ""
00:18.3 "Host bridge" "Advanced Micro Devices [AMD]" "K8 [Athlon64/Opteron] Miscellaneous Control" "" ""
02:00.0 "3D controller" "NVIDIA Corporation" "GT218 [GeForce 210]" -ra2 "ASUSTeK Computer Inc." "Device 8344"
02:00.1 "Audio device" "NVIDIA Corporation" "High Definition Audio Controller" -ra1 "ASUSTeK Computer Inc." "Device 8344"