Voilà, depuis aujourd'hui (peut-être après la mise à jour hier soir), mon netbook Asus 1001PX sous Fedora 20 32-bit démarre normalement mais me donne un écran noir à partir d'un certain moment lors du démarrage (avant d'avoir l'accueil GDM). Ce qui est bizarre est que, en se connectant à l'aveugle, ou en branchant un vidéoprojecteur (après le démarrage cependant), on peut afficher sur cet écran secondaire. Le menu "Écrans" affiche d'ailleurs les deux écrans comme reconnus (et clonés, réglage choisi auparavant).

Vu que le PC affiche quelque chose au démarrage, j'exclus un faux contact au niveau de l'écran, défaut qui arrive parfois sur ce netbook et qui se modifie souvent en modifiant légèrement l'inclinaison de l'écran.

La mise à jour de ce soir, incluant le serveur X, n'a rien changé.

Je pense avoir des soucis matériels car, après un certain temps d'utilisation, toute nouvelle fenêtre ou même un clic droit s'affiche en noir, mais ça ne semble pas lié car ça se voyait aussi sur l'écran secondaire.

Quelqu'un d'autre rencontre-t-il se problème ?

Et pour s'inscrire sur Bugzilla, il faut une adresse mail ?
Démarre en niveau 3 et va regarder les erreurs dans le fichier log du serveur X ?
Merci pour ta réponse. Je recopie ici le contenu du dernier log du serveur X :
[    61.168] 
X.Org X Server 1.14.4
Release Date: 2013-10-31
[    61.168] X Protocol Version 11, Revision 0
[    61.168] Build Operating System:  2.6.32-358.14.1.el6.x86_64 
[    61.168] Current Operating System: Linux NT02 3.11.9-300.fc20.i686 #1 SMP Wed Nov 20 22:47:36 UTC 2013 i686
[    61.169] Kernel command line: BOOT_IMAGE=/vmlinuz-3.11.9-300.fc20.i686 root=/dev/mapper/vg_nt02-lv_root ro quiet rhgb LANG=en_US.UTF-8
[    61.169] Build Date: 21 November 2013  05:41:17AM
[    61.169] Build ID: xorg-x11-server 1.14.4-5.fc20 
[    61.170] Current version of pixman: 0.30.0
[    61.170] 	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
[    61.170] Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[    61.171] (==) Log file: "/var/log/Xorg.0.log", Time: Thu Nov 28 21:25:34 2013
[    62.556] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[    62.558] (==) No Layout section.  Using the first Screen section.
[    62.558] (==) No screen section available. Using defaults.
[    62.558] (**) |-->Screen "Default Screen Section" (0)
[    62.558] (**) |   |-->Monitor "<default monitor>"
[    62.558] (==) No monitor specified for screen "Default Screen Section".
	Using a default monitor configuration.
[    62.559] (==) Automatically adding devices
[    62.559] (==) Automatically enabling devices
[    62.559] (==) Automatically adding GPU devices
[    62.559] (==) FontPath set to:
	catalogue:/etc/X11/fontpath.d,
	built-ins
[    62.559] (==) ModulePath set to "/usr/lib/xorg/modules"
[    62.559] (II) The server relies on udev to provide the list of input devices.
	If no devices become available, reconfigure udev or disable AutoAddDevices.
[    62.559] (II) Loader magic: 0x826b6a0
[    62.559] (II) Module ABI versions:
[    62.559] 	X.Org ANSI C Emulation: 0.4
[    62.559] 	X.Org Video Driver: 14.1
[    62.559] 	X.Org XInput driver : 19.2
[    62.559] 	X.Org Server Extension : 7.0
[    62.561] (II) xfree86: Adding drm device (/dev/dri/card0)
[    62.566] (--) PCI:*(0:0:2:0) 8086:a011:1043:83ac rev 0, Mem @ 0xf7e00000/524288, 0xd0000000/268435456, 0xf7d00000/1048576, I/O @ 0x0000dc00/8, BIOS @ 0x????????/131072
[    62.566] (--) PCI: (0:0:2:1) 8086:a012:1043:83ac rev 0, Mem @ 0xf7e80000/524288, BIOS @ 0x????????/65536
[    62.567] Initializing built-in extension Generic Event Extension
[    62.567] Initializing built-in extension SHAPE
[    62.567] Initializing built-in extension MIT-SHM
[    62.567] Initializing built-in extension XInputExtension
[    62.567] Initializing built-in extension XTEST
[    62.567] Initializing built-in extension BIG-REQUESTS
[    62.567] Initializing built-in extension SYNC
[    62.567] Initializing built-in extension XKEYBOARD
[    62.567] Initializing built-in extension XC-MISC
[    62.567] Initializing built-in extension XINERAMA
[    62.567] Initializing built-in extension XFIXES
[    62.567] Initializing built-in extension RENDER
[    62.567] Initializing built-in extension RANDR
[    62.567] Initializing built-in extension COMPOSITE
[    62.567] Initializing built-in extension DAMAGE
[    62.567] Initializing built-in extension MIT-SCREEN-SAVER
[    62.567] Initializing built-in extension DOUBLE-BUFFER
[    62.567] Initializing built-in extension RECORD
[    62.568] Initializing built-in extension DPMS
[    62.568] Initializing built-in extension X-Resource
[    62.568] Initializing built-in extension XVideo
[    62.568] Initializing built-in extension XVideo-MotionCompensation
[    62.568] Initializing built-in extension SELinux
[    62.568] Initializing built-in extension XFree86-VidModeExtension
[    62.568] Initializing built-in extension XFree86-DGA
[    62.568] Initializing built-in extension XFree86-DRI
[    62.568] Initializing built-in extension DRI2
[    62.568] (II) "glx" will be loaded by default.
[    62.568] (WW) "xwayland" is not to be loaded by default. Skipping.
[    62.568] (II) LoadModule: "dri2"
[    62.568] (II) Module "dri2" already built-in
[    62.568] (II) LoadModule: "glamoregl"
[    62.569] (II) Loading /usr/lib/xorg/modules/libglamoregl.so
[    62.581] (II) Module glamoregl: vendor="X.Org Foundation"
[    62.581] 	compiled for 1.14.3, module version = 0.5.1
[    62.581] 	ABI class: X.Org ANSI C Emulation, version 0.4
[    62.581] (II) LoadModule: "glx"
[    62.582] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[    62.583] (II) Module glx: vendor="X.Org Foundation"
[    62.583] 	compiled for 1.14.4, module version = 1.0.0
[    62.583] 	ABI class: X.Org Server Extension, version 7.0
[    62.583] (==) AIGLX enabled
[    62.583] Loading extension GLX
[    62.583] (==) Matched intel as autoconfigured driver 0
[    62.583] (==) Matched intel as autoconfigured driver 1
[    62.583] (==) Matched modesetting as autoconfigured driver 2
[    62.583] (==) Matched fbdev as autoconfigured driver 3
[    62.583] (==) Matched vesa as autoconfigured driver 4
[    62.583] (==) Assigned the driver to the xf86ConfigLayout
[    62.584] (II) LoadModule: "intel"
[    62.584] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[    62.585] (II) Module intel: vendor="X.Org Foundation"
[    62.585] 	compiled for 1.14.4, module version = 2.21.15
[    62.585] 	Module class: X.Org Video Driver
[    62.585] 	ABI class: X.Org Video Driver, version 14.1
[    62.585] (II) LoadModule: "modesetting"
[    62.586] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[    62.586] (II) Module modesetting: vendor="X.Org Foundation"
[    62.586] 	compiled for 1.14.2, module version = 0.8.0
[    62.586] 	Module class: X.Org Video Driver
[    62.586] 	ABI class: X.Org Video Driver, version 14.1
[    62.586] (II) LoadModule: "fbdev"
[    62.587] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[    62.587] (II) Module fbdev: vendor="X.Org Foundation"
[    62.587] 	compiled for 1.14.2, module version = 0.4.3
[    62.587] 	Module class: X.Org Video Driver
[    62.587] 	ABI class: X.Org Video Driver, version 14.1
[    62.587] (II) LoadModule: "vesa"
[    62.588] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[    62.589] (II) Module vesa: vendor="X.Org Foundation"
[    62.589] 	compiled for 1.14.2, module version = 2.3.2
[    62.589] 	Module class: X.Org Video Driver
[    62.589] 	ABI class: X.Org Video Driver, version 14.1
[    62.589] (II) intel: Driver for Intel(R) 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, HD Graphics,
	HD Graphics 2000, HD Graphics 3000, HD Graphics 2500,
	HD Graphics 4000, HD Graphics P4000, HD Graphics 4600,
	HD Graphics 5000, HD Graphics P4600/P4700, Iris(TM) Graphics 5100,
	HD Graphics 4400, HD Graphics 4200, Iris(TM) Pro Graphics 5200
[    62.593] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[    62.593] (II) FBDEV: driver for framebuffer: fbdev
[    62.593] (II) VESA: driver for VESA chipsets: vesa
[    62.593] (++) using VT number 1

[    62.596] (WW) Falling back to old probe method for modesetting
[    62.596] (WW) Falling back to old probe method for fbdev
[    62.596] (II) Loading sub module "fbdevhw"
[    62.596] (II) LoadModule: "fbdevhw"
[    62.597] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[    62.597] (II) Module fbdevhw: vendor="X.Org Foundation"
[    62.597] 	compiled for 1.14.4, module version = 0.0.2
[    62.597] 	ABI class: X.Org Video Driver, version 14.1
[    62.598] (WW) Falling back to old probe method for vesa
[    62.598] (II) intel(0): Creating default Display subsection in Screen section
	"Default Screen Section" for depth/fbbpp 24/32
[    62.598] (==) intel(0): Depth 24, (--) framebuffer bpp 32
[    62.598] (==) intel(0): RGB weight 888
[    62.598] (==) intel(0): Default visual is TrueColor
[    62.599] (--) intel(0): Integrated Graphics Chipset: Intel(R) Pineview GM
[    62.599] (**) intel(0): Relaxed fencing enabled
[    62.599] (**) intel(0): Wait on SwapBuffers? enabled
[    62.599] (**) intel(0): Triple buffering? enabled
[    62.599] (**) intel(0): Framebuffer tiled
[    62.599] (**) intel(0): Pixmaps tiled
[    62.599] (**) intel(0): 3D buffers tiled
[    62.599] (**) intel(0): SwapBuffers wait enabled
[    62.599] (==) intel(0): video overlay key set to 0x101fe
[    62.600] (II) intel(0): Output LVDS1 has no monitor section
[    62.600] (--) intel(0): found backlight control interface /sys/class/backlight/acpi_video0
[    62.630] (II) intel(0): Output VGA1 has no monitor section
[    62.630] (II) intel(0): EDID for output LVDS1
[    62.630] (II) intel(0): Manufacturer: HSD  Model: 3e9  Serial#: 132604
[    62.630] (II) intel(0): Year: 2010  Week: 15
[    62.630] (II) intel(0): EDID Version: 1.3
[    62.630] (II) intel(0): Digital Display Input
[    62.630] (II) intel(0): Max Image Size [cm]: horiz.: 22  vert.: 13
[    62.631] (II) intel(0): Gamma: 2.20
[    62.631] (II) intel(0): No DPMS capabilities specified
[    62.631] (II) intel(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4 
[    62.631] (II) intel(0): First detailed timing is preferred mode
[    62.631] (II) intel(0): redX: 0.580 redY: 0.340   greenX: 0.317 greenY: 0.564
[    62.631] (II) intel(0): blueX: 0.152 blueY: 0.131   whiteX: 0.310 whiteY: 0.330
[    62.631] (II) intel(0): Manufacturer's mask: 0
[    62.631] (II) intel(0): Supported detailed timing:
[    62.631] (II) intel(0): clock: 45.0 MHz   Image Size:  220 x 129 mm
[    62.631] (II) intel(0): h_active: 1024  h_sync: 1077  h_sync_end 1112 h_blank_end 1200 h_border: 0
[    62.631] (II) intel(0): v_active: 600  v_sync: 604  v_sync_end 609 v_blanking: 625 v_border: 0
[    62.631] (II) intel(0): Supported detailed timing:
[    62.631] (II) intel(0): clock: 51.4 MHz   Image Size:  220 x 129 mm
[    62.632] (II) intel(0): h_active: 1024  h_sync: 1117  h_sync_end 1152 h_blank_end 1240 h_border: 0
[    62.632] (II) intel(0): v_active: 600  v_sync: 617  v_sync_end 622 v_blanking: 638 v_border: 0
[    62.632] (II) intel(0):  
[    62.632] (II) intel(0):  
[    62.632] (II) intel(0): EDID (in hex):
[    62.632] (II) intel(0): 	00ffffffffffff002264e903fc050200
[    62.632] (II) intel(0): 	0f14010380160d780a86269457519027
[    62.632] (II) intel(0): 	214f5400000001010101010101010101
[    62.632] (II) intel(0): 	010101010101941100b0405819203523
[    62.632] (II) intel(0): 	4500dc8100000019161400d840582620
[    62.632] (II) intel(0): 	5d231504dc8100000000000000fe0000
[    62.632] (II) intel(0): 	000000000000000000000000000000fe
[    62.633] (II) intel(0): 	000000000000000000010000000000c6
[    62.633] (II) intel(0): Not using default mode "320x240" (doublescan mode not supported)
[    62.633] (II) intel(0): Not using default mode "400x300" (doublescan mode not supported)
[    62.633] (II) intel(0): Not using default mode "400x300" (doublescan mode not supported)
[    62.633] (II) intel(0): Not using default mode "512x384" (doublescan mode not supported)
[    62.633] (II) intel(0): Not using default mode "640x480" (doublescan mode not supported)
[    62.634] (II) intel(0): Not using default mode "640x512" (doublescan mode not supported)
[    62.634] (II) intel(0): Not using default mode "800x600" (doublescan mode not supported)
[    62.634] (II) intel(0): Not using default mode "800x600" (doublescan mode not supported)
[    62.634] (II) intel(0): Not using default mode "700x525" (doublescan mode not supported)
[    62.634] (II) intel(0): Printing probed modes for output LVDS1
[    62.634] (II) intel(0): Modeline "1024x600"x60.0   45.00  1024 1077 1112 1200  600 604 609 625 -hsync -vsync (37.5 kHz eP)
[    62.634] (II) intel(0): Modeline "1024x600"x65.0   51.42  1024 1117 1152 1240  600 617 622 638 -hsync -vsync (41.5 kHz e)
[    62.634] (II) intel(0): Modeline "800x600"x60.3   40.00  800 840 968 1056  600 601 605 628 +hsync +vsync (37.9 kHz d)
[    62.634] (II) intel(0): Modeline "800x600"x56.2   36.00  800 824 896 1024  600 601 603 625 +hsync +vsync (35.2 kHz d)
[    62.634] (II) intel(0): Modeline "640x480"x59.9   25.18  640 656 752 800  480 490 492 525 -hsync -vsync (31.5 kHz d)
[    62.664] (II) intel(0): EDID for output VGA1
[    62.664] (II) intel(0): Output LVDS1 connected
[    62.664] (II) intel(0): Output VGA1 disconnected
[    62.664] (II) intel(0): Using exact sizes for initial modes
[    62.664] (II) intel(0): Output LVDS1 using initial mode 1024x600 +0+0
[    62.664] (II) intel(0): Using default gamma of (1.0, 1.0, 1.0) unless otherwise stated.
[    62.664] (II) intel(0): Kernel page flipping support detected, enabling
[    62.664] (==) intel(0): DPI set to (96, 96)
[    62.665] (II) Loading sub module "fb"
[    62.665] (II) LoadModule: "fb"
[    62.665] (II) Loading /usr/lib/xorg/modules/libfb.so
[    62.666] (II) Module fb: vendor="X.Org Foundation"
[    62.666] 	compiled for 1.14.4, module version = 1.0.0
[    62.666] 	ABI class: X.Org ANSI C Emulation, version 0.4
[    62.666] (II) Loading sub module "dri2"
[    62.666] (II) LoadModule: "dri2"
[    62.666] (II) Module "dri2" already built-in
[    62.666] (II) UnloadModule: "modesetting"
[    62.666] (II) Unloading modesetting
[    62.667] (II) UnloadModule: "fbdev"
[    62.667] (II) Unloading fbdev
[    62.667] (II) UnloadSubModule: "fbdevhw"
[    62.667] (II) Unloading fbdevhw
[    62.667] (II) UnloadModule: "vesa"
[    62.667] (II) Unloading vesa
[    62.667] (==) Depth 24 pixmap format is 32 bpp
[    62.668] (II) intel(0): [DRI2] Setup complete
[    62.668] (II) intel(0): [DRI2]   DRI driver: i915
[    62.668] (II) intel(0): Allocated new frame buffer 1024x600 stride 4096, tiled
[    62.668] (II) UXA(0): Driver registered support for the following operations:
[    62.668] (II)         solid
[    62.668] (II)         copy
[    62.668] (II)         composite (RENDER acceleration)
[    62.668] (II)         put_image
[    62.668] (II)         get_image
[    62.669] (==) intel(0): Backing store disabled
[    62.669] (==) intel(0): Silken mouse enabled
[    62.669] (II) intel(0): Initializing HW Cursor
[    62.669] (II) intel(0): RandR 1.2 enabled, ignore the following RandR disabled message.
[    62.682] (==) intel(0): DPMS enabled
[    62.682] (==) intel(0): Intel XvMC decoder disabled
[    62.682] (II) intel(0): Set up textured video
[    62.682] (II) intel(0): Set up overlay video
[    62.683] (II) intel(0): direct rendering: DRI2 Enabled
[    62.683] (==) intel(0): hotplug detection: "enabled"
[    62.699] (--) RandR disabled
[    62.723] (II) SELinux: Disabled by boolean
[    62.749] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer
[    62.749] (II) AIGLX: enabled GLX_INTEL_swap_event
[    62.749] (II) AIGLX: enabled GLX_ARB_create_context
[    62.749] (II) AIGLX: enabled GLX_ARB_create_context_profile
[    62.749] (II) AIGLX: enabled GLX_EXT_create_context_es2_profile
[    62.749] (II) AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control
[    62.750] (II) AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects
[    62.750] (II) AIGLX: Loaded and initialized i915
[    62.750] (II) GLX: Initialized DRI2 GL provider for screen 0
[    62.751] (II) intel(0): Setting screen physical size to 270 x 158
[    64.957] (II) config/udev: Adding input device Power Button (/dev/input/event3)
[    64.957] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[    64.957] (II) LoadModule: "evdev"
[    64.957] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[    64.959] (II) Module evdev: vendor="X.Org Foundation"
[    64.959] 	compiled for 1.14.3, module version = 2.8.2
[    64.959] 	Module class: X.Org XInput Driver
[    64.959] 	ABI class: X.Org XInput driver, version 19.2
[    64.959] (II) Using input driver 'evdev' for 'Power Button'
[    64.959] (**) Power Button: always reports core events
[    64.959] (**) evdev: Power Button: Device: "/dev/input/event3"
[    64.960] (--) evdev: Power Button: Vendor 0 Product 0x1
[    64.960] (--) evdev: Power Button: Found keys
[    64.960] (II) evdev: Power Button: Configuring as keyboard
[    64.960] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input3/event3"
[    64.960] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
[    64.960] (**) Option "xkb_rules" "evdev"
[    64.960] (**) Option "xkb_model" "pc104"
[    64.960] (**) Option "xkb_layout" "us"
[    65.050] (II) config/udev: Adding input device Video Bus (/dev/input/event6)
[    65.050] (**) Video Bus: Applying InputClass "evdev keyboard catchall"
[    65.050] (II) Using input driver 'evdev' for 'Video Bus'
[    65.050] (**) Video Bus: always reports core events
[    65.050] (**) evdev: Video Bus: Device: "/dev/input/event6"
[    65.050] (--) evdev: Video Bus: Vendor 0 Product 0x6
[    65.050] (--) evdev: Video Bus: Found keys
[    65.050] (II) evdev: Video Bus: Configuring as keyboard
[    65.051] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:00/input/input6/event6"
[    65.051] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 7)
[    65.051] (**) Option "xkb_rules" "evdev"
[    65.051] (**) Option "xkb_model" "pc104"
[    65.051] (**) Option "xkb_layout" "us"
[    65.053] (II) config/udev: Adding input device Power Button (/dev/input/event2)
[    65.053] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[    65.053] (II) Using input driver 'evdev' for 'Power Button'
[    65.053] (**) Power Button: always reports core events
[    65.053] (**) evdev: Power Button: Device: "/dev/input/event2"
[    65.053] (--) evdev: Power Button: Vendor 0 Product 0x1
[    65.053] (--) evdev: Power Button: Found keys
[    65.053] (II) evdev: Power Button: Configuring as keyboard
[    65.053] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input2/event2"
[    65.053] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 8)
[    65.053] (**) Option "xkb_rules" "evdev"
[    65.053] (**) Option "xkb_model" "pc104"
[    65.053] (**) Option "xkb_layout" "us"
[    65.055] (II) config/udev: Adding input device Lid Switch (/dev/input/event0)
[    65.055] (II) No input driver specified, ignoring this device.
[    65.055] (II) This device may have been added with another device file.
[    65.057] (II) config/udev: Adding input device Sleep Button (/dev/input/event1)
[    65.057] (**) Sleep Button: Applying InputClass "evdev keyboard catchall"
[    65.057] (II) Using input driver 'evdev' for 'Sleep Button'
[    65.057] (**) Sleep Button: always reports core events
[    65.057] (**) evdev: Sleep Button: Device: "/dev/input/event1"
[    65.057] (--) evdev: Sleep Button: Vendor 0 Product 0x3
[    65.057] (--) evdev: Sleep Button: Found keys
[    65.057] (II) evdev: Sleep Button: Configuring as keyboard
[    65.057] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/device:00/PNP0C0E:00/input/input1/event1"
[    65.057] (II) XINPUT: Adding extended input device "Sleep Button" (type: KEYBOARD, id 9)
[    65.057] (**) Option "xkb_rules" "evdev"
[    65.058] (**) Option "xkb_model" "pc104"
[    65.058] (**) Option "xkb_layout" "us"
[    65.059] (II) config/udev: Adding drm device (/dev/dri/card0)
[    65.061] (II) config/udev: Adding input device HDA Intel Headphone Mic (/dev/input/event9)
[    65.061] (II) No input driver specified, ignoring this device.
[    65.061] (II) This device may have been added with another device file.
[    65.062] (II) config/udev: Adding input device USB2.0 UVC VGA WebCam (/dev/input/event8)
[    65.062] (**) USB2.0 UVC VGA WebCam: Applying InputClass "evdev keyboard catchall"
[    65.062] (II) Using input driver 'evdev' for 'USB2.0 UVC VGA WebCam'
[    65.062] (**) USB2.0 UVC VGA WebCam: always reports core events
[    65.063] (**) evdev: USB2.0 UVC VGA WebCam: Device: "/dev/input/event8"
[    65.063] (--) evdev: USB2.0 UVC VGA WebCam: Vendor 0x13d3 Product 0x5119
[    65.063] (--) evdev: USB2.0 UVC VGA WebCam: Found keys
[    65.063] (II) evdev: USB2.0 UVC VGA WebCam: Configuring as keyboard
[    65.063] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:1d.7/usb1/1-6/1-6:1.0/input/input8/event8"
[    65.063] (II) XINPUT: Adding extended input device "USB2.0 UVC VGA WebCam" (type: KEYBOARD, id 10)
[    65.063] (**) Option "xkb_rules" "evdev"
[    65.063] (**) Option "xkb_model" "pc104"
[    65.063] (**) Option "xkb_layout" "us"
[    65.066] (II) config/udev: Adding input device Eee PC WMI hotkeys (/dev/input/event7)
[    65.066] (**) Eee PC WMI hotkeys: Applying InputClass "evdev keyboard catchall"
[    65.066] (II) Using input driver 'evdev' for 'Eee PC WMI hotkeys'
[    65.066] (**) Eee PC WMI hotkeys: always reports core events
[    65.066] (**) evdev: Eee PC WMI hotkeys: Device: "/dev/input/event7"
[    65.066] (--) evdev: Eee PC WMI hotkeys: Vendor 0 Product 0
[    65.066] (--) evdev: Eee PC WMI hotkeys: Found keys
[    65.066] (II) evdev: Eee PC WMI hotkeys: Configuring as keyboard
[    65.066] (**) Option "config_info" "udev:/sys/devices/platform/eeepc-wmi/input/input7/event7"
[    65.067] (II) XINPUT: Adding extended input device "Eee PC WMI hotkeys" (type: KEYBOARD, id 11)
[    65.067] (**) Option "xkb_rules" "evdev"
[    65.067] (**) Option "xkb_model" "pc104"
[    65.067] (**) Option "xkb_layout" "us"
[    65.069] (II) config/udev: Adding input device AT Translated Set 2 keyboard (/dev/input/event4)
[    65.069] (**) AT Translated Set 2 keyboard: Applying InputClass "evdev keyboard catchall"
[    65.069] (II) Using input driver 'evdev' for 'AT Translated Set 2 keyboard'
[    65.069] (**) AT Translated Set 2 keyboard: always reports core events
[    65.070] (**) evdev: AT Translated Set 2 keyboard: Device: "/dev/input/event4"
[    65.070] (--) evdev: AT Translated Set 2 keyboard: Vendor 0x1 Product 0x1
[    65.070] (--) evdev: AT Translated Set 2 keyboard: Found keys
[    65.070] (II) evdev: AT Translated Set 2 keyboard: Configuring as keyboard
[    65.070] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio0/input/input4/event4"
[    65.070] (II) XINPUT: Adding extended input device "AT Translated Set 2 keyboard" (type: KEYBOARD, id 12)
[    65.070] (**) Option "xkb_rules" "evdev"
[    65.070] (**) Option "xkb_model" "pc104"
[    65.070] (**) Option "xkb_layout" "us"
[    65.072] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/event5)
[    65.073] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "evdev touchpad catchall"
[    65.073] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "touchpad catchall"
[    65.073] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "Default clickpad buttons"
[    65.073] (II) LoadModule: "synaptics"
[    65.074] (II) Loading /usr/lib/xorg/modules/input/synaptics_drv.so
[    65.074] (II) Module synaptics: vendor="X.Org Foundation"
[    65.074] 	compiled for 1.14.2, module version = 1.7.1
[    65.074] 	Module class: X.Org XInput Driver
[    65.074] 	ABI class: X.Org XInput driver, version 19.2
[    65.074] (II) Using input driver 'synaptics' for 'SynPS/2 Synaptics TouchPad'
[    65.074] (**) SynPS/2 Synaptics TouchPad: always reports core events
[    65.075] (**) Option "Device" "/dev/input/event5"
[    65.103] (II) synaptics: SynPS/2 Synaptics TouchPad: ignoring touch events for semi-multitouch device
[    65.103] (--) synaptics: SynPS/2 Synaptics TouchPad: x-axis range 1472 - 5808 (res 80)
[    65.103] (--) synaptics: SynPS/2 Synaptics TouchPad: y-axis range 1408 - 4842 (res 136)
[    65.103] (--) synaptics: SynPS/2 Synaptics TouchPad: pressure range 0 - 255
[    65.103] (--) synaptics: SynPS/2 Synaptics TouchPad: finger width range 0 - 15
[    65.103] (--) synaptics: SynPS/2 Synaptics TouchPad: buttons: left right double triple
[    65.103] (--) synaptics: SynPS/2 Synaptics TouchPad: Vendor 0x2 Product 0x7
[    65.104] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
[    65.104] (**) SynPS/2 Synaptics TouchPad: always reports core events
[    65.119] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio1/input/input5/event5"
[    65.119] (II) XINPUT: Adding extended input device "SynPS/2 Synaptics TouchPad" (type: TOUCHPAD, id 13)
[    65.119] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) MinSpeed is now constant deceleration 2.5
[    65.119] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) MaxSpeed is now 1.75
[    65.119] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) AccelFactor is now 0.036
[    65.120] (**) SynPS/2 Synaptics TouchPad: (accel) keeping acceleration scheme 1
[    65.120] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration profile 1
[    65.120] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration factor: 2.000
[    65.120] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration threshold: 4
[    65.120] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
[    65.121] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/mouse0)
[    65.121] (II) No input driver specified, ignoring this device.
[    65.121] (II) This device may have been added with another device file.
[    80.256] (II) intel(0): EDID vendor "HSD", prod id 1001
[    80.256] (II) intel(0): DDCModeFromDetailedTiming: 1024x600 Warning: We only handle separate sync.
[    80.256] (II) intel(0): Printing DDC gathered Modelines:
[    80.256] (II) intel(0): Modeline "1024x600"x0.0   45.00  1024 1077 1112 1200  600 604 609 625 -hsync -vsync (37.5 kHz eP)
[    80.256] (II) intel(0): Modeline "1024x600"x0.0   51.42  1024 1117 1152 1240  600 617 622 638 -hsync -vsync (41.5 kHz e)
[    99.274] (II) intel(0): EDID vendor "HSD", prod id 1001
[    99.274] (II) intel(0): DDCModeFromDetailedTiming: 1024x600 Warning: We only handle separate sync.
[    99.275] (II) intel(0): Printing DDC gathered Modelines:
[    99.275] (II) intel(0): Modeline "1024x600"x0.0   45.00  1024 1077 1112 1200  600 604 609 625 -hsync -vsync (37.5 kHz eP)
[    99.275] (II) intel(0): Modeline "1024x600"x0.0   51.42  1024 1117 1152 1240  600 617 622 638 -hsync -vsync (41.5 kHz e)
[   370.949] (II) intel(0): EDID vendor "HSD", prod id 1001
[   370.949] (II) intel(0): DDCModeFromDetailedTiming: 1024x600 Warning: We only handle separate sync.
[   370.950] (II) intel(0): Printing DDC gathered Modelines:
[   370.950] (II) intel(0): Modeline "1024x600"x0.0   45.00  1024 1077 1112 1200  600 604 609 625 -hsync -vsync (37.5 kHz eP)
[   370.950] (II) intel(0): Modeline "1024x600"x0.0   51.42  1024 1117 1152 1240  600 617 622 638 -hsync -vsync (41.5 kHz e)
[   373.382] (II) intel(0): EDID vendor "HSD", prod id 1001
[   373.382] (II) intel(0): DDCModeFromDetailedTiming: 1024x600 Warning: We only handle separate sync.
[   373.382] (II) intel(0): Printing DDC gathered Modelines:
[   373.383] (II) intel(0): Modeline "1024x600"x0.0   45.00  1024 1077 1112 1200  600 604 609 625 -hsync -vsync (37.5 kHz eP)
[   373.383] (II) intel(0): Modeline "1024x600"x0.0   51.42  1024 1117 1152 1240  600 617 622 638 -hsync -vsync (41.5 kHz e)
Tu es sur que tu as tout jusqu'à la fin ? J'ai un soupçon là.
Cela semble être le fichier le plus récent. J'en ai un daté de mardi, donc avant ce problème. Au total, dans /var/log, j'ai cinq fichiers : Xorg.0.log, Xorg.0.log.old, Xorg.1.log, Xorg.1.log.old et Xorg.9.log. Je les ai copiés par la commande cp dans mon /home sur mon netbook par ssh puis par glisser-déposer sur cet ordi (ma tour) par Nautilus/ssh.
Bizarre j'ai l'impression qu'il manque la fin du fichier.
tu es sûr de ne pas avoir simplement basculer sur l'écran externe (touche FnF8) ?
Alors, avec F8 ça peut me faire basculer sur un écran externe (le réglage par défaut étant de n'allumer que l'écran externe car la carte graphique semble avoir du mal à suivre). J'ai testé cet après-midi sur un 15" au travail.

Une fois dans les réglages de Gnome, je peux choisir de cloner les écrans mais ça ne change absolument rien.

Autre chose aussi, avec un écran externe ou un vidéoprojecteur, l'écran d'ouverture de session - GDM- n'apparaît jamais, alors que ce qu'il y a avant et après oui.