shell-deb:/etc/X11# lspci
00:00.0 Host bridge: Intel Corporation 4 Series Chipset DRAM Controller (rev 03)
00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03)
00:1a.0 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #4
00:1a.1 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #5
00:1a.7 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #2
00:1b.0 Audio device: Intel Corporation 82801JI (ICH10 Family) HD Audio Controller
00:1c.0 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Root Port 1
00:1c.2 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Root Port 3
00:1d.0 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #1
00:1d.1 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #2
00:1d.2 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #3
00:1d.7 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #1
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 90)
00:1f.0 ISA bridge: Intel Corporation 82801JIR (ICH10R) LPC Interface Controller
00:1f.2 RAID bus controller: Intel Corporation 82801 SATA RAID Controller
00:1f.3 SMBus: Intel Corporation 82801JI (ICH10 Family) SMBus Controller
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
shell-deb:/etc/X11# lspci -s 0:2.0 -v
00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03) (prog-if 00 [VGA controller])
Subsystem: Dell Device 0439
Flags: bus master, fast devsel, latency 0, IRQ 43
Memory at fe400000 (64-bit, non-prefetchable) [size=4M]
Memory at d0000000 (64-bit, prefetchable) [size=256M]
I/O ports at dc00 [size=8]
Expansion ROM at <unassigned> [disabled]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [a4] PCI Advanced Features
Kernel driver in use: i915
能看到是否使用了正确的内核模块。如果没有，修改/etc/modules使用正确的模块，并用blacklist屏蔽错误的模块。另外也可能是模块参数问题。
shell-deb:/etc/initramfs-tools# cat /var/log/Xorg.0.log | grep LoadModule
[ 13.235] (II) LoadModule: "extmod"
[ 13.318] (II) LoadModule: "dbe"
[ 13.319] (II) LoadModule: "glx"
[ 13.334] (II) LoadModule: "record"
[ 13.335] (II) LoadModule: "dri"
[ 13.350] (II) LoadModule: "dri2"
[ 13.351] (II) LoadModule: "intel"
[ 13.363] (II) LoadModule: "vesa"
[ 13.493] (II) LoadModule: "fbdev"
[ 13.506] (II) LoadModule: "fbdevhw"
[ 13.787] (II) LoadModule: "fb"
[ 13.881] (II) LoadModule: "dri2"
[ 15.651] (II) LoadModule: "evdev"