ubuntu安装重启后不能进入图形界面

[Cheshire]

安装时使用nomodeset模式安装的。重启后仍用nomodeset模式，只能进入命令行界面。startx命令失败总返回no screens found错误.该肿么办......我是win8，双显卡
xorg.0.log文件内容如下
[ 1753.276]
X.Org X Server 1.13.3
Release Date: 2013-03-07
[ 1753.280] X Protocol Version 11, Revision 0
[ 1753.281] Build Operating System: Linux 3.2.0-37-generic x86_64 Ubuntu
[ 1753.282] Current Operating System: Linux panzhihui-pad 3.8.0-19-generic #29-Ubuntu SMP Wed Apr 17 18:16:28 UTC 2013 x86_64
[ 1753.282] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=9a4f247c-276c-48ff-97c5-624f2659e4aa ro quiet splash i915.modeset=0 vt.handoff=7
[ 1753.283] Build Date: 17 April 2013 10:43:13PM
[ 1753.284] xorg-server 2:1.13.3-0ubuntu6 (For technical support please see http://www.ubuntu.com/support)
[ 1753.285] Current version of pixman: 0.28.2
[ 1753.286] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 1753.286] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 1753.289] (==) Log file: "/var/log/Xorg.0.log", Time: Fri Sep 13 19:02:52 2013
[ 1753.290] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 1753.290] (==) No Layout section. Using the first Screen section.
[ 1753.290] (==) No screen section available. Using defaults.
[ 1753.290] (**) |-->Screen "Default Screen Section" (0)
[ 1753.290] (**) | |-->Monitor "<default monitor>"
[ 1753.290] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
[ 1753.290] (==) Automatically adding devices
[ 1753.290] (==) Automatically enabling devices
[ 1753.290] (==) Automatically adding GPU devices
[ 1753.290] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[ 1753.290] Entry deleted from font path.
[ 1753.290] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[ 1753.290] Entry deleted from font path.
[ 1753.290] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[ 1753.290] Entry deleted from font path.
[ 1753.290] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[ 1753.290] Entry deleted from font path.
[ 1753.290] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[ 1753.290] Entry deleted from font path.
[ 1753.290] (WW) The directory "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType" does not exist.
[ 1753.291] Entry deleted from font path.
[ 1753.291] (==) FontPath set to:
/usr/share/fonts/X11/misc,
/usr/share/fonts/X11/Type1,
built-ins
[ 1753.291] (==) ModulePath set to "/usr/lib/x86_64-linux-gnu/xorg/extra-modules,/usr/lib/xorg/extra-modules,/usr/lib/xorg/modules"
[ 1753.291] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 1753.291] (II) Loader magic: 0x7f395800dd20
[ 1753.291] (II) Module ABI versions:
[ 1753.291] X.Org ANSI C Emulation: 0.4
[ 1753.291] X.Org Video Driver: 13.1
[ 1753.291] X.Org XInput driver : 18.0
[ 1753.291] X.Org Server Extension : 7.0
[ 1753.291] (--) PCI:*(0:0:2:0) 8086:0a16:17aa:3800 rev 9, Mem @ 0xb5000000/4194304, 0xc0000000/268435456, I/O @ 0x00006000/64
[ 1753.291] (--) PCI: (0:9:0:0) 10de:1290:17aa:3800 rev 161, Mem @ 0xb3000000/16777216, 0xa0000000/268435456, 0xb0000000/33554432, I/O @ 0x00003000/128
[ 1753.291] (II) Open ACPI successful (/var/run/acpid.socket)
[ 1753.292] Initializing built-in extension Generic Event Extension
[ 1753.293] Initializing built-in extension SHAPE
[ 1753.294] Initializing built-in extension MIT-SHM
[ 1753.295] Initializing built-in extension XInputExtension
[ 1753.296] Initializing built-in extension XTEST
[ 1753.297] Initializing built-in extension BIG-REQUESTS
[ 1753.297] Initializing built-in extension SYNC
[ 1753.298] Initializing built-in extension XKEYBOARD
[ 1753.299] Initializing built-in extension XC-MISC
[ 1753.300] Initializing built-in extension SECURITY
[ 1753.301] Initializing built-in extension XINERAMA
[ 1753.302] Initializing built-in extension XFIXES
[ 1753.302] Initializing built-in extension RENDER
[ 1753.303] Initializing built-in extension RANDR
[ 1753.304] Initializing built-in extension COMPOSITE
[ 1753.304] Initializing built-in extension DAMAGE
[ 1753.305] Initializing built-in extension MIT-SCREEN-SAVER
[ 1753.306] Initializing built-in extension DOUBLE-BUFFER
[ 1753.307] Initializing built-in extension RECORD
[ 1753.307] Initializing built-in extension DPMS
[ 1753.308] Initializing built-in extension X-Resource
[ 1753.309] Initializing built-in extension XVideo
[ 1753.309] Initializing built-in extension XVideo-MotionCompensation
[ 1753.310] Initializing built-in extension SELinux
[ 1753.311] Initializing built-in extension XFree86-VidModeExtension
[ 1753.311] Initializing built-in extension XFree86-DGA
[ 1753.312] Initializing built-in extension XFree86-DRI
[ 1753.312] Initializing built-in extension DRI2
[ 1753.312] (II) LoadModule: "glx"
[ 1753.313] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 1753.313] (II) Module glx: vendor="X.Org Foundation"
[ 1753.313] compiled for 1.13.3, module version = 1.0.0
[ 1753.313] ABI class: X.Org Server Extension, version 7.0
[ 1753.313] (==) AIGLX enabled
[ 1753.313] Loading extension GLX
[ 1753.313] (==) Matched intel as autoconfigured driver 0
[ 1753.313] (==) Matched vesa as autoconfigured driver 1
[ 1753.313] (==) Matched modesetting as autoconfigured driver 2
[ 1753.313] (==) Matched fbdev as autoconfigured driver 3
[ 1753.313] (==) Assigned the driver to the xf86ConfigLayout
[ 1753.313] (II) LoadModule: "intel"
[ 1753.313] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[ 1753.313] (II) Module intel: vendor="X.Org Foundation"
[ 1753.313] compiled for 1.13.3, module version = 2.21.6
[ 1753.313] Module class: X.Org Video Driver
[ 1753.313] ABI class: X.Org Video Driver, version 13.1
[ 1753.313] (II) LoadModule: "vesa"
[ 1753.314] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[ 1753.314] (II) Module vesa: vendor="X.Org Foundation"
[ 1753.314] compiled for 1.12.99.902, module version = 2.3.2
[ 1753.314] Module class: X.Org Video Driver
[ 1753.314] ABI class: X.Org Video Driver, version 13.0
[ 1753.314] (II) LoadModule: "modesetting"
[ 1753.314] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[ 1753.314] (II) Module modesetting: vendor="X.Org Foundation"
[ 1753.314] compiled for 1.13.3, module version = 0.7.0
[ 1753.314] Module class: X.Org Video Driver
[ 1753.314] ABI class: X.Org Video Driver, version 13.1
[ 1753.314] (II) LoadModule: "fbdev"
[ 1753.314] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[ 1753.314] (II) Module fbdev: vendor="X.Org Foundation"
[ 1753.314] compiled for 1.12.99.902, module version = 0.4.3
[ 1753.314] Module class: X.Org Video Driver
[ 1753.314] ABI class: X.Org Video Driver, version 13.0
[ 1753.314] (II) intel: Driver for Intel Integrated Graphics Chipsets: i810,
i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G, 915G,
E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM, Pineview G,
965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33, GM45,
4 Series, G45/G43, Q45/Q43, G41, B43, B43, Clarkdale, Arrandale,
Sandybridge Desktop (GT1), Sandybridge Desktop (GT2),
Sandybridge Desktop (GT2+), Sandybridge Mobile (GT1),
Sandybridge Mobile (GT2), Sandybridge Mobile (GT2+),
Sandybridge Server, Ivybridge Mobile (GT1), Ivybridge Mobile (GT2),
Ivybridge Desktop (GT1), Ivybridge Desktop (GT2), Ivybridge Server,
Ivybridge Server (GT2), Haswell Desktop (GT1), Haswell Desktop (GT2),
Haswell Desktop (GT2+), Haswell Mobile (GT1), Haswell Mobile (GT2),
Haswell Mobile (GT2+), Haswell Server (GT1), Haswell Server (GT2),
Haswell Server (GT2+), Haswell SDV Desktop (GT1),
Haswell SDV Desktop (GT2), Haswell SDV Desktop (GT2+),
Haswell SDV Mobile (GT1), Haswell SDV Mobile (GT2),
Haswell SDV Mobile (GT2+), Haswell SDV Server (GT1),
Haswell SDV Server (GT2), Haswell SDV Server (GT2+),
Haswell ULT Desktop (GT1), Haswell ULT Desktop (GT2),
Haswell ULT Desktop (GT2+), Haswell ULT Mobile (GT1),
Haswell ULT Mobile (GT2), Haswell ULT Mobile (GT2+),
Haswell ULT Server (GT1), Haswell ULT Server (GT2),
Haswell ULT Server (GT2+), Haswell CRW Desktop (GT1),
Haswell CRW Desktop (GT2), Haswell CRW Desktop (GT2+),
Haswell CRW Mobile (GT1), Haswell CRW Mobile (GT2),
Haswell CRW Mobile (GT2+), Haswell CRW Server (GT1),
Haswell CRW Server (GT2), Haswell CRW Server (GT2+),
ValleyView PO board
[ 1753.314] (II) VESA: driver for VESA chipsets: vesa
[ 1753.314] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[ 1753.314] (II) FBDEV: driver for framebuffer: fbdev
[ 1753.314] (--) using VT number 7

[ 1753.318] (WW) Falling back to old probe method for modesetting
[ 1753.318] (EE) open /dev/dri/card0: No such file or directory
[ 1753.318] (WW) Falling back to old probe method for fbdev
[ 1753.318] (II) Loading sub module "fbdevhw"
[ 1753.318] (II) LoadModule: "fbdevhw"
[ 1753.318] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[ 1753.318] (II) Module fbdevhw: vendor="X.Org Foundation"
[ 1753.318] compiled for 1.13.3, module version = 0.0.2
[ 1753.318] ABI class: X.Org Video Driver, version 13.1
[ 1753.319] (II) Loading sub module "vbe"
[ 1753.319] (II) LoadModule: "vbe"
[ 1753.319] (II) Loading /usr/lib/xorg/modules/libvbe.so
[ 1753.319] (II) Module vbe: vendor="X.Org Foundation"
[ 1753.319] compiled for 1.13.3, module version = 1.1.0
[ 1753.319] ABI class: X.Org Video Driver, version 13.1
[ 1753.319] (II) Loading sub module "int10"
[ 1753.319] (II) LoadModule: "int10"
[ 1753.319] (II) Loading /usr/lib/xorg/modules/libint10.so
[ 1753.319] (II) Module int10: vendor="X.Org Foundation"
[ 1753.319] compiled for 1.13.3, module version = 1.0.0
[ 1753.319] ABI class: X.Org Video Driver, version 13.1
[ 1753.319] (II) VESA(0): initializing int10
[ 1753.319] (EE) VESA(0): V_BIOS address 0x0 out of range
[ 1753.319] (II) UnloadModule: "vesa"
[ 1753.319] (II) UnloadSubModule: "int10"
[ 1753.319] (II) Unloading int10
[ 1753.319] (II) UnloadSubModule: "vbe"
[ 1753.319] (II) Unloading vbe
[ 1753.319] (EE) Screen(s) found, but none have a usable configuration.
[ 1753.319]
Fatal server error:
[ 1753.319] no screens found
[ 1753.319] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 1753.319] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 1753.319] (EE)
[ 1753.325] Server terminated with error (1). Closing log file.

[Cheshire]

就没有人能帮帮咱么