[SOLVED] linux-3.13.6-1 and systemd-210-3 causes black screen

Question

My computer boots into total black screen after recent update, including linux-3.13.6-1, xf86-video-intel-2.99.910-1 and systemd-210-3.  I have tried all combinations of rollback, I find  linux-3.12.7-2  + systemd-208-2 resolves my problem.
As I dig on, I find it a problem with systemd-backlight. With running kernel-3.13 and systemd-{210,211},  disabling systemd-backlight service either through kernel parameter systemd.restore_state=0 or by masking systemd-backlight service can fix my problem.
Still, I am not the only one experiencing black screen and unresponsive X input with 3.13 kernel: several radeon user seem to have similar phenomenon but cannot be fixed by disabling backlight restore.  I would suspect restoring backlight is just one of many ways to trigger this issue, I not experienced in kernel, but I will try to debug the problem. Help will be appreciated.
There seems nothing wrong with X, but a problem with power management.
[ 458.859]
X.Org X Server 1.15.0
Release Date: 2013-12-27
[ 458.859] X Protocol Version 11, Revision 0
[ 458.859] Build Operating System: Linux 3.12.5-1-ARCH x86_64
[ 458.859] Current Operating System: Linux goshawk 3.13.6-1-ARCH #1 SMP PREEMPT Fri Mar 7 22:47:48 CET 2014 x86_64
[ 458.859] Kernel command line: root=/dev/sda6 resume=/dev/sda7 ipv6.disable=1 acpi_osi=Linux i915.modeset=1
[ 458.859] Build Date: 09 January 2014 08:47:24AM
[ 458.859]
[ 458.859] Current version of pixman: 0.32.4
[ 458.859] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 458.859] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 458.860] (==) Log file: "/var/log/Xorg.1.log", Time: Thu Mar 13 15:15:34 2014
[ 458.860] (==) Using config directory: "/etc/X11/xorg.conf.d"
[ 458.860] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 458.860] (==) No Layout section. Using the first Screen section.
[ 458.860] (==) No screen section available. Using defaults.
[ 458.860] (**) |-->Screen "Default Screen Section" (0)
[ 458.860] (**) | |-->Monitor "<default monitor>"
[ 458.860] (==) No device specified for screen "Default Screen Section".
Using the first device section listed.
[ 458.860] (**) | |-->Device "Intel Graphics"
[ 458.860] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
[ 458.860] (==) Automatically adding devices
[ 458.860] (==) Automatically enabling devices
[ 458.860] (==) Automatically adding GPU devices
[ 458.860] (WW) The directory "/usr/share/fonts/OTF/" does not exist.
[ 458.860] Entry deleted from font path.
[ 458.860] (==) FontPath set to:
/usr/share/fonts/misc/,
/usr/share/fonts/TTF/,
/usr/share/fonts/Type1/,
/usr/share/fonts/100dpi/,
/usr/share/fonts/75dpi/
[ 458.860] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 458.860] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 458.860] (II) Loader magic: 0x804c80
[ 458.860] (II) Module ABI versions:
[ 458.860] X.Org ANSI C Emulation: 0.4
[ 458.861] X.Org Video Driver: 15.0
[ 458.861] X.Org XInput driver : 20.0
[ 458.861] X.Org Server Extension : 8.0
[ 458.861] (II) xfree86: Adding drm device (/dev/dri/card1)
[ 459.667] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 459.669] (--) PCI:*(0:0:2:0) 8086:0046:1025:0365 rev 24, Mem @ 0xf0000000/4194304, 0xd0000000/268435456, I/O @ 0x00001800/8
[ 459.669] (--) PCI: (0:2:0:0) 1002:68c1:1025:0365 rev 0, Mem @ 0xb0000000/268435456, 0xafee0000/131072, I/O @ 0x00002000/256, BIOS @ 0x????????/131072
[ 459.670] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
[ 459.670] Initializing built-in extension Generic Event Extension
[ 459.670] Initializing built-in extension SHAPE
[ 459.670] Initializing built-in extension MIT-SHM
[ 459.670] Initializing built-in extension XInputExtension
[ 459.670] Initializing built-in extension XTEST
[ 459.670] Initializing built-in extension BIG-REQUESTS
[ 459.670] Initializing built-in extension SYNC
[ 459.670] Initializing built-in extension XKEYBOARD
[ 459.670] Initializing built-in extension XC-MISC
[ 459.670] Initializing built-in extension SECURITY
[ 459.670] Initializing built-in extension XINERAMA
[ 459.670] Initializing built-in extension XFIXES
[ 459.670] Initializing built-in extension RENDER
[ 459.670] Initializing built-in extension RANDR
[ 459.670] Initializing built-in extension COMPOSITE
[ 459.670] Initializing built-in extension DAMAGE
[ 459.670] Initializing built-in extension MIT-SCREEN-SAVER
[ 459.670] Initializing built-in extension DOUBLE-BUFFER
[ 459.670] Initializing built-in extension RECORD
[ 459.670] Initializing built-in extension DPMS
[ 459.670] Initializing built-in extension Present
[ 459.670] Initializing built-in extension DRI3
[ 459.670] Initializing built-in extension X-Resource
[ 459.670] Initializing built-in extension XVideo
[ 459.670] Initializing built-in extension XVideo-MotionCompensation
[ 459.670] Initializing built-in extension XFree86-VidModeExtension
[ 459.670] Initializing built-in extension XFree86-DGA
[ 459.670] Initializing built-in extension XFree86-DRI
[ 459.670] Initializing built-in extension DRI2
[ 459.670] (II) "glx" will be loaded by default.
[ 459.670] (II) LoadModule: "dri2"
[ 459.670] (II) Module "dri2" already built-in
[ 459.670] (II) LoadModule: "glamoregl"
[ 459.670] (II) Loading /usr/lib/xorg/modules/libglamoregl.so
[ 459.673] (II) Module glamoregl: vendor="X.Org Foundation"
[ 459.673] compiled for 1.15.0, module version = 0.6.0
[ 459.673] ABI class: X.Org ANSI C Emulation, version 0.4
[ 459.673] (II) LoadModule: "glx"
[ 459.673] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 459.674] (II) Module glx: vendor="X.Org Foundation"
[ 459.674] compiled for 1.15.0, module version = 1.0.0
[ 459.674] ABI class: X.Org Server Extension, version 8.0
[ 459.674] (==) AIGLX enabled
[ 459.674] Loading extension GLX
[ 459.674] (II) LoadModule: "intel"
[ 459.674] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[ 459.674] (II) Module intel: vendor="X.Org Foundation"
[ 459.674] compiled for 1.15.0, module version = 2.99.910
[ 459.674] Module class: X.Org Video Driver
[ 459.674] ABI class: X.Org Video Driver, version 15.0
[ 459.674] (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
[ 459.675] (II) intel: Driver for Intel(R) HD Graphics: 2000-5000
[ 459.675] (II) intel: Driver for Intel(R) Iris(TM) Graphics: 5100
[ 459.675] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics: 5200
[ 459.675] (++) using VT number 1
[ 459.676] (--) intel(0): Integrated Graphics Chipset: Intel(R) HD Graphics
[ 459.676] (--) intel(0): CPU: x86-64, sse2, sse3, ssse3, sse4.1, sse4.2
[ 459.676] (II) intel(0): Creating default Display subsection in Screen section
"Default Screen Section" for depth/fbbpp 24/32
[ 459.676] (==) intel(0): Depth 24, (--) framebuffer bpp 32
[ 459.676] (==) intel(0): RGB weight 888
[ 459.676] (==) intel(0): Default visual is TrueColor
[ 459.676] (**) intel(0): Option "AccelMethod" "sna"
[ 459.676] (**) intel(0): Framebuffer tiled
[ 459.676] (**) intel(0): Pixmaps tiled
[ 459.676] (**) intel(0): "Tear free" disabled
[ 459.676] (**) intel(0): Forcing per-crtc-pixmaps? no
[ 459.676] (II) intel(0): Output LVDS1 has no monitor section
[ 459.703] (--) intel(0): found backlight control interface acpi_video1 (type 'firmware')
[ 459.703] (II) intel(0): Output VGA1 has no monitor section
[ 459.703] (II) intel(0): Output VIRTUAL1 has no monitor section
[ 459.703] (--) intel(0): Output LVDS1 using initial mode 1366x768 on pipe 0
[ 459.703] (==) intel(0): DPI set to (96, 96)
[ 459.703] (II) Loading sub module "dri2"
[ 459.703] (II) LoadModule: "dri2"
[ 459.703] (II) Module "dri2" already built-in
[ 459.703] (==) Depth 24 pixmap format is 32 bpp
[ 459.703] (II) intel(0): SNA initialized with Ironlake (gen5) backend
[ 459.704] (==) intel(0): Backing store enabled
[ 459.704] (==) intel(0): Silken mouse enabled
[ 459.704] (II) intel(0): HW Cursor enabled
[ 459.704] (II) intel(0): RandR 1.2 enabled, ignore the following RandR disabled message.
[ 459.704] (==) intel(0): DPMS enabled
[ 459.704] (II) intel(0): [XvMC] xvmc_vld driver initialized.
[ 459.704] (II) intel(0): [DRI2] Setup complete
[ 459.704] (II) intel(0): [DRI2] DRI driver: i965
[ 459.704] (II) intel(0): [DRI2] VDPAU driver: i965
[ 459.704] (II) intel(0): direct rendering: DRI2 Enabled
[ 459.704] (==) intel(0): hotplug detection: "enabled"
[ 459.704] (--) RandR disabled
[ 459.712] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer
[ 459.712] (II) AIGLX: enabled GLX_ARB_create_context
[ 459.712] (II) AIGLX: enabled GLX_ARB_create_context_profile
[ 459.712] (II) AIGLX: enabled GLX_EXT_create_context_es2_profile
[ 459.712] (II) AIGLX: enabled GLX_INTEL_swap_event
[ 459.712] (II) AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control
[ 459.712] (II) AIGLX: enabled GLX_EXT_framebuffer_sRGB
[ 459.712] (II) AIGLX: enabled GLX_ARB_fbconfig_float
[ 459.712] (II) AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects
[ 459.712] (II) AIGLX: Loaded and initialized i965
[ 459.712] (II) GLX: Initialized DRI2 GL provider for screen 0
[ 459.720] (II) intel(0): switch to mode [email protected] on LVDS1 using pipe 0, position (0, 0), rotation normal, reflection none
[ 459.786] (II) intel(0): Setting screen physical size to 361 x 203
[ 459.913] (II) config/udev: Adding input device Power Button (/dev/input/event2)
[ 459.913] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[ 459.913] (**) Power Button: Applying InputClass "Acer Keyboard"
[ 459.913] (II) LoadModule: "evdev"
[ 459.913] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[ 459.913] (II) Module evdev: vendor="X.Org Foundation"
[ 459.913] compiled for 1.15.0, module version = 2.8.2
[ 459.913] Module class: X.Org XInput Driver
[ 459.913] ABI class: X.Org XInput driver, version 20.0
[ 459.913] (II) Using input driver 'evdev' for 'Power Button'
[ 459.913] (**) Power Button: always reports core events
[ 459.913] (**) evdev: Power Button: Device: "/dev/input/event2"
[ 459.913] (--) evdev: Power Button: Vendor 0 Product 0x1
[ 459.913] (--) evdev: Power Button: Found keys
[ 459.913] (II) evdev: Power Button: Configuring as keyboard
[ 459.913] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input2/event2"
[ 459.913] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
[ 459.913] (**) Option "xkb_rules" "evdev"
[ 459.913] (**) Option "xkb_model" "acer_laptop"
[ 459.913] (**) Option "xkb_layout" "us"
[ 459.936] (II) config/udev: Adding input device Video Bus (/dev/input/event4)
[ 459.936] (**) Video Bus: Applying InputClass "evdev keyboard catchall"
[ 459.936] (**) Video Bus: Applying InputClass "Acer Keyboard"
[ 459.936] (II) Using input driver 'evdev' for 'Video Bus'
[ 459.936] (**) Video Bus: always reports core events
[ 459.936] (**) evdev: Video Bus: Device: "/dev/input/event4"
[ 459.936] (--) evdev: Video Bus: Vendor 0 Product 0x6
[ 459.936] (--) evdev: Video Bus: Found keys
[ 459.936] (II) evdev: Video Bus: Configuring as keyboard
[ 459.936] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:01/input/input4/event4"
[ 459.936] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 7)
[ 459.936] (**) Option "xkb_rules" "evdev"
[ 459.936] (**) Option "xkb_model" "acer_laptop"
[ 459.936] (**) Option "xkb_layout" "us"
[ 459.936] (II) config/udev: Adding input device Video Bus (/dev/input/event3)
[ 459.936] (**) Video Bus: Applying InputClass "evdev keyboard catchall"
[ 459.936] (**) Video Bus: Applying InputClass "Acer Keyboard"
[ 459.936] (II) Using input driver 'evdev' for 'Video Bus'
[ 459.936] (**) Video Bus: always reports core events
[ 459.936] (**) evdev: Video Bus: Device: "/dev/input/event3"
[ 459.936] (--) evdev: Video Bus: Vendor 0 Product 0x6
[ 459.936] (--) evdev: Video Bus: Found keys
[ 459.936] (II) evdev: Video Bus: Configuring as keyboard
[ 459.936] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:01/LNXVIDEO:00/input/input3/event3"
[ 459.936] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 8)
[ 459.936] (**) Option "xkb_rules" "evdev"
[ 459.936] (**) Option "xkb_model" "acer_laptop"
[ 459.936] (**) Option "xkb_layout" "us"
[ 459.937] (II) config/udev: Adding input device Lid Switch (/dev/input/event0)
[ 459.937] (II) No input driver specified, ignoring this device.
[ 459.937] (II) This device may have been added with another device file.
[ 459.937] (II) config/udev: Adding input device Sleep Button (/dev/input/event1)
[ 459.937] (**) Sleep Button: Applying InputClass "evdev keyboard catchall"
[ 459.937] (**) Sleep Button: Applying InputClass "Acer Keyboard"
[ 459.937] (II) Using input driver 'evdev' for 'Sleep Button'
[ 459.937] (**) Sleep Button: always reports core events
[ 459.937] (**) evdev: Sleep Button: Device: "/dev/input/event1"
[ 459.937] (--) evdev: Sleep Button: Vendor 0 Product 0x3
[ 459.937] (--) evdev: Sleep Button: Found keys
[ 459.937] (II) evdev: Sleep Button: Configuring as keyboard
[ 459.937] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/device:00/PNP0C0E:00/input/input1/event1"
[ 459.937] (II) XINPUT: Adding extended input device "Sleep Button" (type: KEYBOARD, id 9)
[ 459.937] (**) Option "xkb_rules" "evdev"
[ 459.937] (**) Option "xkb_model" "acer_laptop"
[ 459.937] (**) Option "xkb_layout" "us"
[ 459.937] (II) config/udev: Adding drm device (/dev/dri/card1)
[ 459.938] (II) config/udev: Adding input device HDA ATI HDMI HDMI/DP,pcm=3 (/dev/input/event13)
[ 459.938] (II) No input driver specified, ignoring this device.
[ 459.938] (II) This device may have been added with another device file.
[ 459.938] (II) config/udev: Adding drm device (/dev/dri/card0)
[ 459.938] (II) config/udev: Adding input device HDA Digital PCBeep (/dev/input/event10)
[ 459.938] (II) No input driver specified, ignoring this device.
[ 459.938] (II) This device may have been added with another device file.
[ 459.938] (II) config/udev: Adding input device HDA Intel MID Mic (/dev/input/event12)
[ 459.938] (II) No input driver specified, ignoring this device.
[ 459.938] (II) This device may have been added with another device file.
[ 459.938] (II) config/udev: Adding input device HDA Intel MID Headphone (/dev/input/event11)
[ 459.938] (II) No input driver specified, ignoring this device.
[ 459.938] (II) This device may have been added with another device file.
[ 459.939] (II) config/udev: Adding input device Logitech Unifying Device. Wireless PID:401b (/dev/input/event6)
[ 459.939] (**) Logitech Unifying Device. Wireless PID:401b: Applying InputClass "evdev pointer catchall"
[ 459.939] (II) Using input driver 'evdev' for 'Logitech Unifying Device. Wireless PID:401b'
[ 459.939] (**) Logitech Unifying Device. Wireless PID:401b: always reports core events
[ 459.939] (**) evdev: Logitech Unifying Device. Wireless PID:401b: Device: "/dev/input/event6"
[ 459.939] (--) evdev: Logitech Unifying Device. Wireless PID:401b: Vendor 0x46d Product 0xc52b
[ 459.939] (--) evdev: Logitech Unifying Device. Wireless PID:401b: Found 20 mouse buttons
[ 459.939] (--) evdev: Logitech Unifying Device. Wireless PID:401b: Found scroll wheel(s)
[ 459.939] (--) evdev: Logitech Unifying Device. Wireless PID:401b: Found relative axes
[ 459.939] (--) evdev: Logitech Unifying Device. Wireless PID:401b: Found x and y relative axes
[ 459.939] (II) evdev: Logitech Unifying Device. Wireless PID:401b: Configuring as mouse
[ 459.939] (II) evdev: Logitech Unifying Device. Wireless PID:401b: Adding scrollwheel support
[ 459.939] (**) evdev: Logitech Unifying Device. Wireless PID:401b: YAxisMapping: buttons 4 and 5
[ 459.939] (**) evdev: Logitech Unifying Device. Wireless PID:401b: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
[ 459.939] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/0003:046D:C52B.0003/input/input7/event6"
[ 459.939] (II) XINPUT: Adding extended input device "Logitech Unifying Device. Wireless PID:401b" (type: MOUSE, id 10)
[ 459.939] (II) evdev: Logitech Unifying Device. Wireless PID:401b: initialized for relative axes.
[ 459.939] (**) Logitech Unifying Device. Wireless PID:401b: (accel) keeping acceleration scheme 1
[ 459.939] (**) Logitech Unifying Device. Wireless PID:401b: (accel) acceleration profile 0
[ 459.939] (**) Logitech Unifying Device. Wireless PID:401b: (accel) acceleration factor: 2.000
[ 459.939] (**) Logitech Unifying Device. Wireless PID:401b: (accel) acceleration threshold: 4
[ 459.939] (II) config/udev: Adding input device Logitech Unifying Device. Wireless PID:401b (/dev/input/mouse0)
[ 459.939] (II) No input driver specified, ignoring this device.
[ 459.939] (II) This device may have been added with another device file.
[ 459.939] (II) config/udev: Adding input device Logitech Unifying Device. Wireless PID:4101 (/dev/input/event7)
[ 459.939] (**) Logitech Unifying Device. Wireless PID:4101: Applying InputClass "evdev pointer catchall"
[ 459.939] (**) Logitech Unifying Device. Wireless PID:4101: Applying InputClass "evdev keyboard catchall"
[ 459.939] (**) Logitech Unifying Device. Wireless PID:4101: Applying InputClass "Acer Keyboard"
[ 459.939] (II) Using input driver 'evdev' for 'Logitech Unifying Device. Wireless PID:4101'
[ 459.940] (**) Logitech Unifying Device. Wireless PID:4101: always reports core events
[ 459.940] (**) evdev: Logitech Unifying Device. Wireless PID:4101: Device: "/dev/input/event7"
[ 459.940] (--) evdev: Logitech Unifying Device. Wireless PID:4101: Vendor 0x46d Product 0xc52b
[ 459.940] (--) evdev: Logitech Unifying Device. Wireless PID:4101: Found 20 mouse buttons
[ 459.940] (--) evdev: Logitech Unifying Device. Wireless PID:4101: Found scroll wheel(s)
[ 459.940] (--) evdev: Logitech Unifying Device. Wireless PID:4101: Found relative axes
[ 459.940] (--) evdev: Logitech Unifying Device. Wireless PID:4101: Found x and y relative axes
[ 459.940] (--) evdev: Logitech Unifying Device. Wireless PID:4101: Found absolute axes
[ 459.940] (II) evdev: Logitech Unifying Device. Wireless PID:4101: Forcing absolute x/y axes to exist.
[ 459.940] (--) evdev: Logitech Unifying Device. Wireless PID:4101: Found keys
[ 459.940] (II) evdev: Logitech Unifying Device. Wireless PID:4101: Configuring as mouse
[ 459.940] (II) evdev: Logitech Unifying Device. Wireless PID:4101: Configuring as keyboard
[ 459.940] (II) evdev: Logitech Unifying Device. Wireless PID:4101: Adding scrollwheel support
[ 459.940] (**) evdev: Logitech Unifying Device. Wireless PID:4101: YAxisMapping: buttons 4 and 5
[ 459.940] (**) evdev: Logitech Unifying Device. Wireless PID:4101: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
[ 459.940] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/0003:046D:C52B.0003/input/input8/event7"
[ 459.940] (II) XINPUT: Adding extended input device "Logitech Unifying Device. Wireless PID:4101" (type: KEYBOARD, id 11)
[ 459.940] (**) Option "xkb_rules" "evdev"
[ 459.940] (**) Option "xkb_model" "acer_laptop"
[ 459.940] (**) Option "xkb_layout" "us"
[ 459.940] (II) evdev: Logitech Unifying Device. Wireless PID:4101: initialized for relative axes.
[ 459.940] (WW) evdev: Logitech Unifying Device. Wireless PID:4101: ignoring absolute axes.
[ 459.940] (**) Logitech Unifying Device. Wireless PID:4101: (accel) keeping acceleration scheme 1
[ 459.940] (**) Logitech Unifying Device. Wireless PID:4101: (accel) acceleration profile 0
[ 459.940] (**) Logitech Unifying Device. Wireless PID:4101: (accel) acceleration factor: 2.000
[ 459.940] (**) Logitech Unifying Device. Wireless PID:4101: (accel) acceleration threshold: 4
[ 459.940] (II) config/udev: Adding input device Logitech Unifying Device. Wireless PID:4101 (/dev/input/mouse1)
[ 459.940] (II) No input driver specified, ignoring this device.
[ 459.940] (II) This device may have been added with another device file.
[ 459.941] (II) config/udev: Adding input device Logitech Unifying Device. Wireless PID:4003 (/dev/input/event8)
[ 459.941] (**) Logitech Unifying Device. Wireless PID:4003: Applying InputClass "evdev keyboard catchall"
[ 459.941] (**) Logitech Unifying Device. Wireless PID:4003: Applying InputClass "Acer Keyboard"
[ 459.941] (II) Using input driver 'evdev' for 'Logitech Unifying Device. Wireless PID:4003'
[ 459.941] (**) Logitech Unifying Device. Wireless PID:4003: always reports core events
[ 459.941] (**) evdev: Logitech Unifying Device. Wireless PID:4003: Device: "/dev/input/event8"
[ 459.941] (--) evdev: Logitech Unifying Device. Wireless PID:4003: Vendor 0x46d Product 0xc52b
[ 459.941] (--) evdev: Logitech Unifying Device. Wireless PID:4003: Found 1 mouse buttons
[ 459.941] (--) evdev: Logitech Unifying Device. Wireless PID:4003: Found scroll wheel(s)
[ 459.941] (--) evdev: Logitech Unifying Device. Wireless PID:4003: Found relative axes
[ 459.941] (II) evdev: Logitech Unifying Device. Wireless PID:4003: Forcing relative x/y axes to exist.
[ 459.941] (--) evdev: Logitech Unifying Device. Wireless PID:4003: Found absolute axes
[ 459.941] (II) evdev: Logitech Unifying Device. Wireless PID:4003: Forcing absolute x/y axes to exist.
[ 459.941] (--) evdev: Logitech Unifying Device. Wireless PID:4003: Found keys
[ 459.941] (II) evdev: Logitech Unifying Device. Wireless PID:4003: Configuring as mouse
[ 459.941] (II) evdev: Logitech Unifying Device. Wireless PID:4003: Configuring as keyboard
[ 459.941] (II) evdev: Logitech Unifying Device. Wireless PID:4003: Adding scrollwheel support
[ 459.941] (**) evdev: Logitech Unifying Device. Wireless PID:4003: YAxisMapping: buttons 4 and 5
[ 459.941] (**) evdev: Logitech Unifying Device. Wireless PID:4003: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
[ 459.941] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/0003:046D:C52B.0003/input/input9/event8"
[ 459.941] (II) XINPUT: Adding extended input device "Logitech Unifying Device. Wireless PID:4003" (type: KEYBOARD, id 12)
[ 459.941] (**) Option "xkb_rules" "evdev"
[ 459.941] (**) Option "xkb_model" "acer_laptop"
[ 459.941] (**) Option "xkb_layout" "us"
[ 459.941] (II) evdev: Logitech Unifying Device. Wireless PID:4003: initialized for relative axes.
[ 459.941] (WW) evdev: Logitech Unifying Device. Wireless PID:4003: ignoring absolute axes.
[ 459.941] (**) Logitech Unifying Device. Wireless PID:4003: (accel) keeping acceleration scheme 1
[ 459.941] (**) Logitech Unifying Device. Wireless PID:4003: (accel) acceleration profile 0
[ 459.941] (**) Logitech Unifying Device. Wireless PID:4003: (accel) acceleration factor: 2.000
[ 459.941] (**) Logitech Unifying Device. Wireless PID:4003: (accel) acceleration threshold: 4
[ 459.941] (II) config/udev: Adding input device 1.3M WebCam (/dev/input/event15)
[ 459.941] (**) 1.3M WebCam: Applying InputClass "evdev keyboard catchall"
[ 459.941] (**) 1.3M WebCam: Applying InputClass "Acer Keyboard"
[ 459.941] (II) Using input driver 'evdev' for '1.3M WebCam'
[ 459.941] (**) 1.3M WebCam: always reports core events
[ 459.941] (**) evdev: 1.3M WebCam: Device: "/dev/input/event15"
[ 459.941] (--) evdev: 1.3M WebCam: Vendor 0x4f2 Product 0xb1d8
[ 459.941] (--) evdev: 1.3M WebCam: Found keys
[ 459.941] (II) evdev: 1.3M WebCam: Configuring as keyboard
[ 459.941] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.0/input/input16/event15"
[ 459.941] (II) XINPUT: Adding extended input device "1.3M WebCam" (type: KEYBOARD, id 13)
[ 459.941] (**) Option "xkb_rules" "evdev"
[ 459.941] (**) Option "xkb_model" "acer_laptop"
[ 459.941] (**) Option "xkb_layout" "us"
[ 459.942] (II) config/udev: Adding input device AT Translated Set 2 keyboard (/dev/input/event5)
[ 459.942] (**) AT Translated Set 2 keyboard: Applying InputClass "evdev keyboard catchall"
[ 459.942] (**) AT Translated Set 2 keyboard: Applying InputClass "Acer Keyboard"
[ 459.942] (II) Using input driver 'evdev' for 'AT Translated Set 2 keyboard'
[ 459.942] (**) AT Translated Set 2 keyboard: always reports core events
[ 459.942] (**) evdev: AT Translated Set 2 keyboard: Device: "/dev/input/event5"
[ 459.942] (--) evdev: AT Translated Set 2 keyboard: Vendor 0x1 Product 0x1
[ 459.942] (--) evdev: AT Translated Set 2 keyboard: Found keys
[ 459.942] (II) evdev: AT Translated Set 2 keyboard: Configuring as keyboard
[ 459.942] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio0/input/input5/event5"
[ 459.942] (II) XINPUT: Adding extended input device "AT Translated Set 2 keyboard" (type: KEYBOARD, id 14)
[ 459.942] (**) Option "xkb_rules" "evdev"
[ 459.942] (**) Option "xkb_model" "acer_laptop"
[ 459.942] (**) Option "xkb_layout" "us"
[ 459.942] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/event14)
[ 459.942] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "evdev touchpad catchall"
[ 459.942] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "touchpad catchall"
[ 459.942] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "Default clickpad buttons"
[ 459.942] (II) LoadModule: "synaptics"
[ 459.943] (II) Loading /usr/lib/xorg/modules/input/synaptics_drv.so
[ 459.943] (II) Module synaptics: vendor="X.Org Foundation"
[ 459.943] compiled for 1.15.0, module version = 1.7.4
[ 459.943] Module class: X.Org XInput Driver
[ 459.943] ABI class: X.Org XInput driver, version 20.0
[ 459.943] (II) Using input driver 'synaptics' for 'SynPS/2 Synaptics TouchPad'
[ 459.943] (**) SynPS/2 Synaptics TouchPad: always reports core events
[ 459.943] (**) Option "Device" "/dev/input/event14"
[ 460.036] (II) synaptics: SynPS/2 Synaptics TouchPad: ignoring touch events for semi-multitouch device
[ 460.036] (--) synaptics: SynPS/2 Synaptics TouchPad: x-axis range 1472 - 5822 (res 79)
[ 460.036] (--) synaptics: SynPS/2 Synaptics TouchPad: y-axis range 1408 - 4766 (res 141)
[ 460.036] (--) synaptics: SynPS/2 Synaptics TouchPad: pressure range 0 - 255
[ 460.036] (--) synaptics: SynPS/2 Synaptics TouchPad: finger width range 0 - 15
[ 460.036] (--) synaptics: SynPS/2 Synaptics TouchPad: buttons: left right double triple
[ 460.036] (--) synaptics: SynPS/2 Synaptics TouchPad: Vendor 0x2 Product 0x7
[ 460.037] (**) Option "TapButton1" "1"
[ 460.037] (**) Option "TapButton2" "2"
[ 460.037] (**) Option "TapButton3" "3"
[ 460.037] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
[ 460.037] (**) SynPS/2 Synaptics TouchPad: always reports core events
[ 460.090] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio1/input/input11/event14"
[ 460.090] (II) XINPUT: Adding extended input device "SynPS/2 Synaptics TouchPad" (type: TOUCHPAD, id 15)
[ 460.090] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) MinSpeed is now constant deceleration 2.5
[ 460.090] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) MaxSpeed is now 1.75
[ 460.090] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) AccelFactor is now 0.036
[ 460.090] (**) SynPS/2 Synaptics TouchPad: (accel) keeping acceleration scheme 1
[ 460.090] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration profile 1
[ 460.090] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration factor: 2.000
[ 460.090] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration threshold: 4
[ 460.090] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
[ 460.090] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/mouse2)
[ 460.090] (**) SynPS/2 Synaptics TouchPad: Ignoring device from InputClass "touchpad ignore duplicates"
[ 460.090] (II) config/udev: Adding input device PC Speaker (/dev/input/event9)
[ 460.090] (II) No input driver specified, ignoring this device.
[ 460.090] (II) This device may have been added with another device file.
[ 464.074] (II) intel(0): EDID vendor "AUO", prod id 12844
[ 464.074] (II) intel(0): Printing DDC gathered Modelines:
[ 464.074] (II) intel(0): Modeline "1366x768"x0.0 69.50 1366 1414 1446 1466 768 771 777 790 -hsync -vsync (47.4 kHz eP)
[ 1616.997] (II) intel(0): switch to mode [email protected] on LVDS1 using pipe 0, position (0, 0), rotation normal, reflection none
[ 1617.370] (II) intel(0): switch to mode [email protected] on LVDS1 using pipe 0, position (0, 0), rotation normal, reflection none
There is no manual setting file for graphics of X, and here is my lspci result:
00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 18)
00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 18)
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 18)
00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05)
00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05)
00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5)
00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05)
00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05)
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Madison [Mobility Radeon HD 5650/5750 / 6530M/6550M] (rev ff)
02:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Redwood HDMI Audio [Radeon HD 5000 Series] (rev ff)
03:00.0 Ethernet controller: Qualcomm Atheros AR8151 v1.0 Gigabit Ethernet (rev c0)
05:00.0 Network controller: Intel Corporation Centrino Advanced-N 6235 (rev 24)
ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 05)
ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 05)
ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 05)
ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 05)
ff:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 05)
ff:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 05)
Last edited by yuanjie.huang (2014-04-02 11:56:21)

Answer 1

Hello! I seem to be having a similar problem to what is being discussed here. So I figured I would add what is going on with me.
I will try to keep it short but I apologize in advance for it being a bit long.
Hardware: 2006 Imac with Radeon mobility x1600
For me there was no problem before the systemd upgrade to 210 and the upgrade to 211 did not fix the problem of black screen on boot.
Also I upgraded my kernel from 3.13.5-1 to 3.13.6-1 after the problem with systemd started.
Downgrading systemd to 208.10 ( the kernel had been upgraded already) got the system working properly again.
I have since gone back to 211 and have found that:
If I wait for 5 - 10 minutes after the computer boots when I move the mouse the screen wakes up and I can unlock the screen and the computer works as normal.
   Note: I am using gdm and gnome3. I think from this that my problem is a brightness/screen not being turned on issue?
If I add nomodeset to the kernel boot parameters the computer works but the Radeon drivers are not loaded.
  and after booting with nomodeset if I use "sudo modprobe radeon modeset=1" my computer screen blacks and I have no response.
With both 210 and 211 I can press ctrl+alt+F2 type my username and password into the blind and give commands like "sudo reboot followed by the password" blindly to the computer and the computer will execute them.
I hope that this can be fixed soon... It is annoying at best.
EDIT
I tried  "sudo modprobe radeon modeset=1" again and found that I can press ctrl+alt+F2 and get a terminal login prompt that I can use and see! Although gdm login/gnome is still a black screen...
Last edited by BirdOfPray (2014-03-26 21:42:04)