1.使用命令lspci -v ，lscpi命令显示PCI设备，-v参数为详细显示。

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00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
Subsystem: ASUSTeK Computer Inc. Device 1447
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
Kernel modules: intel-agp

00:01.0 PCI bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express PCI Express Root Port (rev 03)
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 00009000-0000bfff
Memory behind bridge: fdf00000-fdffffff
Prefetchable memory behind bridge: 00000000bdf00000-00000000ddefffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp

00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02)
Subsystem: ASUSTeK Computer Inc. Device 1447
Flags: bus master, fast devsel, latency 0, IRQ 21
Memory at febfc000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: HDA Intel
Kernel modules: snd-hda-intel

00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 02)
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
I/O behind bridge: 00001000-00001fff
Memory behind bridge: fe000000-fe0fffff
Prefetchable memory behind bridge: 00000000b8000000-00000000b81fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp

00:1c.2 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 3 (rev 02)
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
I/O behind bridge: 0000c000-0000cfff
Memory behind bridge: fe100000-fe1fffff
Prefetchable memory behind bridge: 00000000b8200000-00000000b83fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp

00:1c.3 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 4 (rev 02)
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=04, subordinate=05, sec-latency=0
I/O behind bridge: 00002000-00002fff
Memory behind bridge: b8400000-b85fffff
Prefetchable memory behind bridge: 00000000b8600000-00000000b87fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp

00:1d.0 USB Controller: Intel Corporation N10/ICH7 Family USB UHCI Controller #1 (rev 02)
Subsystem: ASUSTeK Computer Inc. Device 1447
Flags: bus master, medium devsel, latency 0, IRQ 23
I/O ports at ec00 [size=32]
Kernel driver in use: uhci_hcd

00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 02)
Subsystem: ASUSTeK Computer Inc. Device 1447
Flags: bus master, medium devsel, latency 0, IRQ 19
I/O ports at e880 [size=32]
Kernel driver in use: uhci_hcd

00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 02)
Subsystem: ASUSTeK Computer Inc. Device 1447
Flags: bus master, medium devsel, latency 0, IRQ 20
I/O ports at e800 [size=32]
Kernel driver in use: uhci_hcd

00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 02)
Subsystem: ASUSTeK Computer Inc. Device 1447
Flags: bus master, medium devsel, latency 0, IRQ 22
I/O ports at e480 [size=32]
Kernel driver in use: uhci_hcd

00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 02) (prog-if 20)
Subsystem: ASUSTeK Computer Inc. Device 1447
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at febfbc00 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci_hcd

00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2) (prog-if 01)
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=06, subordinate=06, sec-latency=32
Memory behind bridge: fea00000-feafffff
Capabilities: <access denied>

00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02)
Subsystem: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge
Flags: bus master, medium devsel, latency 0
Capabilities: <access denied>
Kernel modules: iTCO_wdt, intel-rng

00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE Controller (rev 02) (prog-if 80 [Master])
Subsystem: ASUSTeK Computer Inc. Device 1447
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19
I/O ports at 01f0 [size=8]
I/O ports at 03f4 [size=1]
I/O ports at 0170 [size=8]
I/O ports at 0374 [size=1]
I/O ports at ffa0 [size=16]
Capabilities: <access denied>
Kernel driver in use: ata_piix

01:00.0 VGA compatible controller: ATI Technologies Inc Mobility Radeon X2300
Subsystem: ASUSTeK Computer Inc. Device 1449
Flags: bus master, fast devsel, latency 0, IRQ 30
Memory at c0000000 (32-bit, prefetchable) [size=256M]
I/O ports at b000 [size=256]
Memory at fdff0000 (32-bit, non-prefetchable) [size=64K]
Expansion ROM at fdfc0000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: radeon
Kernel modules: radeon

02:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)
Subsystem: Intel Corporation Device 1002
Flags: bus master, fast devsel, latency 0, IRQ 29
Memory at fe0ff000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: iwl3945
Kernel modules: iwl3945

03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01)
Subsystem: ASUSTeK Computer Inc. Device 11f5
Flags: bus master, fast devsel, latency 0, IRQ 28
I/O ports at c800 [size=256]
Memory at fe1ff000 (64-bit, non-prefetchable) [size=4K]
Expansion ROM at fe1e0000 [disabled] [size=64K]
Capabilities: <access denied>
Kernel driver in use: r8169
Kernel modules: r8169

06:00.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (prog-if 10)
Subsystem: ASUSTeK Computer Inc. Device 1447
Flags: bus master, medium devsel, latency 64, IRQ 17
Memory at feaff800 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Kernel driver in use: ohci1394
Kernel modules: firewire-ohci, ohci1394

06:00.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19)
Subsystem: ASUSTeK Computer Inc. Device 1447
Flags: bus master, medium devsel, latency 64, IRQ 17
Memory at feaff400 (32-bit, non-prefetchable) [size=256]
Capabilities: <access denied>
Kernel driver in use: sdhci-pci
Kernel modules: sdhci-pci

06:00.2 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 0a)
Subsystem: ASUSTeK Computer Inc. Device 1447
Flags: medium devsel, IRQ 5
Memory at feaff000 (32-bit, non-prefetchable) [size=256]
Capabilities: <access denied>

06:00.3 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 05)
Subsystem: ASUSTeK Computer Inc. Device 1447
Flags: medium devsel, IRQ 5
Memory at feafec00 (32-bit, non-prefetchable) [size=256]
Capabilities: <access denied>

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2.查找VGA显示部分，发现如下类似内容：
Kernel driver in use: radeon
Kernel modules: radeon
3.即是使用的内核带的开源驱动。

PS：使用内核2.60.30版本开始，ATI Readon x2300开源驱动显示呈有雨点状彩点，临时安装fglrx官方驱动此现象消失，现在更新到内核2.60.32-21，重新使用开源驱动雨点状色彩点消失。估计于KMS有关系。