Arch Linux

redevined

Member

Registered: 2019-12-12

Posts: 6

[SOLVED] lightDM screen black, xrandr outputs "Can't open display"

Started installing arch on my new Thinkpad T495 today, but I can't seem to get lightDM + i3 to work.
So far I installed lightdm, lightdm-gtk-greeter, i3, xorg-server, xorg-xinit, xorg-xrandr, xf86-video-fbdev, xf86-video-amd, xf86-video-ati and various other.

When I try to start lightDM with

systemctl start lightdm.service

the screen turns black, with only the blinking cursor at the top left corner.
Also, when trying to run

xrandr

it outputs

Can't open display

lspci -k | grep -e VGA

gives

... [AMD/ATI] Picasso (rev d3)

also /etc/X11/xorg.conf.d/ is empty.

Do you have any suggestion what I could try to get this working?

Last edited by redevined (2020-04-07 13:14:28)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 78,161

Re: [SOLVED] lightDM screen black, xrandr outputs "Can't open display"

https://wiki.archlinux.org/index.php/Li … TTY_output
https://wiki.archlinux.org/index.php/Ke … _KMS_start

If you run xrandr on some console login, you'll have to inform it to which X11 server to talk to, eg "DISPLAY=:0 xrandr -q".
Please also post your xorg log.

---

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

redevined

Member

Registered: 2019-12-12

Posts: 6

Re: [SOLVED] lightDM screen black, xrandr outputs "Can't open display"

Both links unfortunately didn't help.
Also "DISPLAY=:0 xrandr -q" produces the same error.

I can however do "startx" which then shows two terminal emulators with white background, if that helps.

My /var/log/Xorg.0.log:

[   315.023] 
X.Org X Server 1.20.6
X Protocol Version 11, Revision 0
[   315.023] Build Operating System: Linux Arch Linux
[   315.023] Current Operating System: Linux archT495 5.4.2-arch1-1 #1 SMP PREEMPT Thu, 05 Dec 2019 12:29:40 +0000 x86_64
[   315.024] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=51d2544a-b4ac-48e6-bfb2-4398560cfc54 rw loglevel=3 quiet acpi_backlight=native
[   315.024] Build Date: 23 November 2019  06:54:33AM
[   315.024]  
[   315.024] Current version of pixman: 0.38.4
[   315.024] 	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
[   315.024] Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[   315.024] (==) Log file: "/var/log/Xorg.0.log", Time: Thu Dec 12 22:54:45 2019
[   315.024] (==) Using config directory: "/etc/X11/xorg.conf.d"
[   315.024] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[   315.024] (==) No Layout section.  Using the first Screen section.
[   315.024] (==) No screen section available. Using defaults.
[   315.024] (**) |-->Screen "Default Screen Section" (0)
[   315.024] (**) |   |-->Monitor "<default monitor>"
[   315.024] (==) No device specified for screen "Default Screen Section".
	Using the first device section listed.
[   315.024] (**) |   |-->Device "AMD"
[   315.024] (==) No monitor specified for screen "Default Screen Section".
	Using a default monitor configuration.
[   315.024] (==) Automatically adding devices
[   315.024] (==) Automatically enabling devices
[   315.024] (==) Automatically adding GPU devices
[   315.024] (==) Automatically binding GPU devices
[   315.024] (==) Max clients allowed: 256, resource mask: 0x1fffff
[   315.024] (WW) The directory "/usr/share/fonts/OTF" does not exist.
[   315.024] 	Entry deleted from font path.
[   315.024] (WW) The directory "/usr/share/fonts/Type1" does not exist.
[   315.024] 	Entry deleted from font path.
[   315.024] (WW) The directory "/usr/share/fonts/100dpi" does not exist.
[   315.024] 	Entry deleted from font path.
[   315.024] (WW) The directory "/usr/share/fonts/75dpi" does not exist.
[   315.024] 	Entry deleted from font path.
[   315.024] (==) FontPath set to:
	/usr/share/fonts/misc,
	/usr/share/fonts/TTF
[   315.024] (==) ModulePath set to "/usr/lib/xorg/modules"
[   315.024] (II) The server relies on udev to provide the list of input devices.
	If no devices become available, reconfigure udev or disable AutoAddDevices.
[   315.024] (II) Module ABI versions:
[   315.024] 	X.Org ANSI C Emulation: 0.4
[   315.024] 	X.Org Video Driver: 24.0
[   315.024] 	X.Org XInput driver : 24.1
[   315.024] 	X.Org Server Extension : 10.0
[   315.025] (++) using VT number 7

[   315.025] (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration
[   315.025] (II) xfree86: Adding drm device (/dev/dri/card0)
[   315.039] (--) PCI:*(5@0:0:0) 1002:15d8:17aa:5125 rev 211, Mem @ 0xc0000000/268435456, 0xd0000000/2097152, 0xd0600000/524288, I/O @ 0x00001000/256
[   315.039] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
[   315.039] (II) LoadModule: "glx"
[   315.039] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[   315.040] (II) Module glx: vendor="X.Org Foundation"
[   315.040] 	compiled for 1.20.6, module version = 1.0.0
[   315.040] 	ABI class: X.Org Server Extension, version 10.0
[   315.040] (II) LoadModule: "amdgpu"
[   315.040] (II) Loading /usr/lib/xorg/modules/drivers/amdgpu_drv.so
[   315.040] (II) Module amdgpu: vendor="X.Org Foundation"
[   315.040] 	compiled for 1.20.5, module version = 19.1.0
[   315.040] 	Module class: X.Org Video Driver
[   315.040] 	ABI class: X.Org Video Driver, version 24.0
[   315.040] (II) AMDGPU: Driver for AMD Radeon:
	All GPUs supported by the amdgpu kernel driver
[   315.041] (II) AMDGPU(0): [KMS] Kernel modesetting enabled.
[   315.044] (II) AMDGPU(0): Creating default Display subsection in Screen section
	"Default Screen Section" for depth/fbbpp 24/32
[   315.044] (==) AMDGPU(0): Depth 24, (--) framebuffer bpp 32
[   315.044] (II) AMDGPU(0): Pixel depth = 24 bits stored in 4 bytes (32 bpp pixmaps)
[   315.044] (==) AMDGPU(0): Default visual is TrueColor
[   315.044] (==) AMDGPU(0): RGB weight 888
[   315.044] (II) AMDGPU(0): Using 8 bits per RGB (8 bit DAC)
[   315.044] (--) AMDGPU(0): Chipset: "Unknown AMD Radeon GPU" (ChipID = 0x15d8)
[   315.044] (II) Loading sub module "fb"
[   315.044] (II) LoadModule: "fb"
[   315.044] (II) Loading /usr/lib/xorg/modules/libfb.so
[   315.044] (II) Module fb: vendor="X.Org Foundation"
[   315.044] 	compiled for 1.20.6, module version = 1.0.0
[   315.044] 	ABI class: X.Org ANSI C Emulation, version 0.4
[   315.044] (II) Loading sub module "dri2"
[   315.044] (II) LoadModule: "dri2"
[   315.044] (II) Module "dri2" already built-in
[   315.102] (II) Loading sub module "glamoregl"
[   315.102] (II) LoadModule: "glamoregl"
[   315.102] (II) Loading /usr/lib/xorg/modules/libglamoregl.so
[   315.105] (II) Module glamoregl: vendor="X.Org Foundation"
[   315.105] 	compiled for 1.20.6, module version = 1.0.1
[   315.105] 	ABI class: X.Org ANSI C Emulation, version 0.4
[   315.121] (II) AMDGPU(0): glamor X acceleration enabled on AMD RAVEN (DRM 3.35.0, 5.4.2-arch1-1, LLVM 9.0.0)
[   315.121] (II) AMDGPU(0): glamor detected, initialising EGL layer.
[   315.121] (==) AMDGPU(0): TearFree property default: auto
[   315.121] (==) AMDGPU(0): VariableRefresh: disabled
[   315.121] (II) AMDGPU(0): KMS Pageflipping: enabled
[   315.121] (II) AMDGPU(0): Output eDP has no monitor section
[   315.121] (II) AMDGPU(0): Output HDMI-A-0 has no monitor section
[   315.121] (II) AMDGPU(0): Output DisplayPort-0 has no monitor section
[   315.121] (II) AMDGPU(0): Output DisplayPort-1 has no monitor section
[   315.136] (II) AMDGPU(0): EDID for output eDP
[   315.136] (II) AMDGPU(0): Manufacturer: CMN  Model: 14d6  Serial#: 0
[   315.136] (II) AMDGPU(0): Year: 2016  Week: 42
[   315.136] (II) AMDGPU(0): EDID Version: 1.4
[   315.136] (II) AMDGPU(0): Digital Display Input
[   315.136] (II) AMDGPU(0): 6 bits per channel
[   315.136] (II) AMDGPU(0): Digital interface is DisplayPort
[   315.136] (II) AMDGPU(0): Max Image Size [cm]: horiz.: 31  vert.: 17
[   315.136] (II) AMDGPU(0): Gamma: 2.20
[   315.136] (II) AMDGPU(0): No DPMS capabilities specified
[   315.136] (II) AMDGPU(0): Supported color encodings: RGB 4:4:4 
[   315.136] (II) AMDGPU(0): First detailed timing is preferred mode
[   315.136] (II) AMDGPU(0): Preferred mode is native pixel format and refresh rate
[   315.136] (II) AMDGPU(0): redX: 0.580 redY: 0.340   greenX: 0.327 greenY: 0.576
[   315.136] (II) AMDGPU(0): blueX: 0.155 blueY: 0.130   whiteX: 0.313 whiteY: 0.329
[   315.136] (II) AMDGPU(0): Manufacturer's mask: 0
[   315.136] (II) AMDGPU(0): Supported detailed timing:
[   315.136] (II) AMDGPU(0): clock: 76.4 MHz   Image Size:  309 x 173 mm
[   315.136] (II) AMDGPU(0): h_active: 1366  h_sync: 1434  h_sync_end 1479 h_blank_end 1592 h_border: 0
[   315.136] (II) AMDGPU(0): v_active: 768  v_sync: 772  v_sync_end 779 v_blanking: 800 v_border: 0
[   315.136] (II) AMDGPU(0):  N140BGA-EA4
[   315.136] (II) AMDGPU(0):  CMN
[   315.136] (II) AMDGPU(0):  N140BGA-EA4
[   315.136] (II) AMDGPU(0): EDID (in hex):
[   315.136] (II) AMDGPU(0): 	00ffffffffffff000daed61400000000
[   315.136] (II) AMDGPU(0): 	2a1a0104951f1178028ed59457539327
[   315.136] (II) AMDGPU(0): 	21505400000001010101010101010101
[   315.136] (II) AMDGPU(0): 	010101010101da1d56e250002030442d
[   315.136] (II) AMDGPU(0): 	470035ad10000018000000fe004e3134
[   315.136] (II) AMDGPU(0): 	304247412d4541340a20000000fe0043
[   315.136] (II) AMDGPU(0): 	4d4e0a202020202020202020000000fe
[   315.136] (II) AMDGPU(0): 	004e3134304247412d4541340a20009a
[   315.136] (II) AMDGPU(0): Printing probed modes for output eDP
[   315.136] (II) AMDGPU(0): Modeline "1366x768"x60.0   76.42  1366 1434 1479 1592  768 772 779 800 -hsync -vsync (48.0 kHz eP)
[   315.136] (II) AMDGPU(0): Modeline "1280x720"x60.0   76.42  1280 1434 1479 1592  720 772 779 800 -hsync -vsync (48.0 kHz e)
[   315.136] (II) AMDGPU(0): Modeline "1024x768"x60.0   76.42  1024 1434 1479 1592  768 772 779 800 -hsync -vsync (48.0 kHz e)
[   315.136] (II) AMDGPU(0): Modeline "800x600"x60.0   76.42  800 1434 1479 1592  600 772 779 800 -hsync -vsync (48.0 kHz e)
[   315.136] (II) AMDGPU(0): Modeline "640x480"x60.0   76.42  640 1434 1479 1592  480 772 779 800 -hsync -vsync (48.0 kHz e)
[   315.136] (II) AMDGPU(0): EDID for output HDMI-A-0
[   315.136] (II) AMDGPU(0): EDID for output DisplayPort-0
[   315.136] (II) AMDGPU(0): EDID for output DisplayPort-1
[   315.136] (II) AMDGPU(0): Output eDP connected
[   315.136] (II) AMDGPU(0): Output HDMI-A-0 disconnected
[   315.136] (II) AMDGPU(0): Output DisplayPort-0 disconnected
[   315.136] (II) AMDGPU(0): Output DisplayPort-1 disconnected
[   315.136] (II) AMDGPU(0): Using exact sizes for initial modes
[   315.136] (II) AMDGPU(0): Output eDP using initial mode 1366x768 +0+0
[   315.136] (II) AMDGPU(0): mem size init: gart size :bf7d2000 vram size: s:7ec1b000 visible:7ec1b000
[   315.136] (==) AMDGPU(0): DPI set to (96, 96)
[   315.136] (==) AMDGPU(0): Using gamma correction (1.0, 1.0, 1.0)
[   315.136] (II) Loading sub module "ramdac"
[   315.136] (II) LoadModule: "ramdac"
[   315.136] (II) Module "ramdac" already built-in
[   315.136] (II) AMDGPU(0): [DRI2] Setup complete
[   315.136] (II) AMDGPU(0): [DRI2]   DRI driver: radeonsi
[   315.136] (II) AMDGPU(0): [DRI2]   VDPAU driver: radeonsi
[   315.157] (II) AMDGPU(0): Front buffer pitch: 5632 bytes
[   315.158] (II) AMDGPU(0): SYNC extension fences enabled
[   315.158] (II) AMDGPU(0): Present extension enabled
[   315.158] (==) AMDGPU(0): DRI3 enabled
[   315.158] (==) AMDGPU(0): Backing store enabled
[   315.158] (II) AMDGPU(0): Direct rendering enabled
[   315.159] (II) AMDGPU(0): Use GLAMOR acceleration.
[   315.159] (II) AMDGPU(0): Acceleration enabled
[   315.159] (==) AMDGPU(0): DPMS enabled
[   315.159] (==) AMDGPU(0): Silken mouse disabled
[   315.159] (II) AMDGPU(0): Set up textured video (glamor)
[   315.170] (II) Initializing extension Generic Event Extension
[   315.170] (II) Initializing extension SHAPE
[   315.170] (II) Initializing extension MIT-SHM
[   315.170] (II) Initializing extension XInputExtension
[   315.170] (II) Initializing extension XTEST
[   315.170] (II) Initializing extension BIG-REQUESTS
[   315.171] (II) Initializing extension SYNC
[   315.171] (II) Initializing extension XKEYBOARD
[   315.171] (II) Initializing extension XC-MISC
[   315.171] (II) Initializing extension SECURITY
[   315.171] (II) Initializing extension XFIXES
[   315.171] (II) Initializing extension RENDER
[   315.171] (II) Initializing extension RANDR
[   315.171] (II) Initializing extension COMPOSITE
[   315.171] (II) Initializing extension DAMAGE
[   315.172] (II) Initializing extension MIT-SCREEN-SAVER
[   315.172] (II) Initializing extension DOUBLE-BUFFER
[   315.172] (II) Initializing extension RECORD
[   315.172] (II) Initializing extension DPMS
[   315.172] (II) Initializing extension Present
[   315.172] (II) Initializing extension DRI3
[   315.172] (II) Initializing extension X-Resource
[   315.172] (II) Initializing extension XVideo
[   315.172] (II) Initializing extension XVideo-MotionCompensation
[   315.172] (II) Initializing extension GLX
[   315.184] (II) AIGLX: Loaded and initialized radeonsi
[   315.184] (II) GLX: Initialized DRI2 GL provider for screen 0
[   315.184] (II) Initializing extension XFree86-VidModeExtension
[   315.184] (II) Initializing extension XFree86-DGA
[   315.184] (II) Initializing extension XFree86-DRI
[   315.184] (II) Initializing extension DRI2
[   315.185] (II) AMDGPU(0): Setting screen physical size to 361 x 203
[   315.235] (II) config/udev: Adding input device Power Button (/dev/input/event3)
[   315.235] (**) Power Button: Applying InputClass "libinput keyboard catchall"
[   315.235] (II) LoadModule: "libinput"
[   315.235] (II) Loading /usr/lib/xorg/modules/input/libinput_drv.so
[   315.236] (II) Module libinput: vendor="X.Org Foundation"
[   315.236] 	compiled for 1.20.5, module version = 0.29.0
[   315.236] 	Module class: X.Org XInput Driver
[   315.236] 	ABI class: X.Org XInput driver, version 24.1
[   315.236] (II) Using input driver 'libinput' for 'Power Button'
[   315.236] (**) Power Button: always reports core events
[   315.236] (**) Option "Device" "/dev/input/event3"
[   315.236] (**) Option "_source" "server/udev"
[   315.237] (II) event3  - Power Button: is tagged by udev as: Keyboard
[   315.238] (II) event3  - Power Button: device is a keyboard
[   315.238] (II) event3  - Power Button: device removed
[   315.281] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input3/event3"
[   315.281] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
[   315.283] (II) event3  - Power Button: is tagged by udev as: Keyboard
[   315.283] (II) event3  - Power Button: device is a keyboard
[   315.285] (II) config/udev: Adding input device Video Bus (/dev/input/event4)
[   315.285] (**) Video Bus: Applying InputClass "libinput keyboard catchall"
[   315.285] (II) Using input driver 'libinput' for 'Video Bus'
[   315.285] (**) Video Bus: always reports core events
[   315.285] (**) Option "Device" "/dev/input/event4"
[   315.285] (**) Option "_source" "server/udev"
[   315.287] (II) event4  - Video Bus: is tagged by udev as: Keyboard
[   315.287] (II) event4  - Video Bus: device is a keyboard
[   315.288] (II) event4  - Video Bus: device removed
[   315.348] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:0b/LNXVIDEO:00/input/input4/event4"
[   315.348] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 7)
[   315.351] (II) event4  - Video Bus: is tagged by udev as: Keyboard
[   315.351] (II) event4  - Video Bus: device is a keyboard
[   315.352] (II) config/udev: Adding input device Power Button (/dev/input/event0)
[   315.352] (**) Power Button: Applying InputClass "libinput keyboard catchall"
[   315.352] (II) Using input driver 'libinput' for 'Power Button'
[   315.352] (**) Power Button: always reports core events
[   315.352] (**) Option "Device" "/dev/input/event0"
[   315.352] (**) Option "_source" "server/udev"
[   315.354] (II) event0  - Power Button: is tagged by udev as: Keyboard
[   315.354] (II) event0  - Power Button: device is a keyboard
[   315.354] (II) event0  - Power Button: device removed
[   315.388] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0/event0"
[   315.388] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 8)
[   315.390] (II) event0  - Power Button: is tagged by udev as: Keyboard
[   315.390] (II) event0  - Power Button: device is a keyboard
[   315.391] (II) config/udev: Adding input device Lid Switch (/dev/input/event1)
[   315.391] (II) No input driver specified, ignoring this device.
[   315.391] (II) This device may have been added with another device file.
[   315.392] (II) config/udev: Adding input device Sleep Button (/dev/input/event2)
[   315.392] (**) Sleep Button: Applying InputClass "libinput keyboard catchall"
[   315.392] (II) Using input driver 'libinput' for 'Sleep Button'
[   315.392] (**) Sleep Button: always reports core events
[   315.392] (**) Option "Device" "/dev/input/event2"
[   315.392] (**) Option "_source" "server/udev"
[   315.394] (II) event2  - Sleep Button: is tagged by udev as: Keyboard
[   315.394] (II) event2  - Sleep Button: device is a keyboard
[   315.394] (II) event2  - Sleep Button: device removed
[   315.415] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input2/event2"
[   315.415] (II) XINPUT: Adding extended input device "Sleep Button" (type: KEYBOARD, id 9)
[   315.417] (II) event2  - Sleep Button: is tagged by udev as: Keyboard
[   315.417] (II) event2  - Sleep Button: device is a keyboard
[   315.418] (II) config/udev: Adding input device HD-Audio Generic HDMI/DP,pcm=7 (/dev/input/event9)
[   315.418] (II) No input driver specified, ignoring this device.
[   315.418] (II) This device may have been added with another device file.
[   315.419] (II) config/udev: Adding input device HD-Audio Generic HDMI/DP,pcm=8 (/dev/input/event10)
[   315.419] (II) No input driver specified, ignoring this device.
[   315.419] (II) This device may have been added with another device file.
[   315.420] (II) config/udev: Adding input device HD-Audio Generic HDMI/DP,pcm=3 (/dev/input/event8)
[   315.420] (II) No input driver specified, ignoring this device.
[   315.420] (II) This device may have been added with another device file.
[   315.421] (II) config/udev: Adding input device Integrated Camera: Integrated C (/dev/input/event14)
[   315.421] (**) Integrated Camera: Integrated C: Applying InputClass "libinput keyboard catchall"
[   315.421] (II) Using input driver 'libinput' for 'Integrated Camera: Integrated C'
[   315.421] (**) Integrated Camera: Integrated C: always reports core events
[   315.421] (**) Option "Device" "/dev/input/event14"
[   315.422] (**) Option "_source" "server/udev"
[   315.425] (II) event14 - Integrated Camera: Integrated C: is tagged by udev as: Keyboard
[   315.425] (II) event14 - Integrated Camera: Integrated C: device is a keyboard
[   315.425] (II) event14 - Integrated Camera: Integrated C: device removed
[   315.481] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:08.1/0000:05:00.4/usb4/4-2/4-2.1/4-2.1:1.0/input/input16/event14"
[   315.481] (II) XINPUT: Adding extended input device "Integrated Camera: Integrated C" (type: KEYBOARD, id 10)
[   315.485] (II) event14 - Integrated Camera: Integrated C: is tagged by udev as: Keyboard
[   315.485] (II) event14 - Integrated Camera: Integrated C: device is a keyboard
[   315.486] (II) config/udev: Adding input device HDA Digital PCBeep (/dev/input/event11)
[   315.486] (II) No input driver specified, ignoring this device.
[   315.486] (II) This device may have been added with another device file.
[   315.486] (II) config/udev: Adding input device HD-Audio Generic Mic (/dev/input/event12)
[   315.486] (II) No input driver specified, ignoring this device.
[   315.486] (II) This device may have been added with another device file.
[   315.487] (II) config/udev: Adding input device HD-Audio Generic Headphone (/dev/input/event13)
[   315.487] (II) No input driver specified, ignoring this device.
[   315.487] (II) This device may have been added with another device file.
[   315.488] (II) config/udev: Adding input device AT Translated Set 2 keyboard (/dev/input/event5)
[   315.488] (**) AT Translated Set 2 keyboard: Applying InputClass "libinput keyboard catchall"
[   315.488] (II) Using input driver 'libinput' for 'AT Translated Set 2 keyboard'
[   315.488] (**) AT Translated Set 2 keyboard: always reports core events
[   315.488] (**) Option "Device" "/dev/input/event5"
[   315.488] (**) Option "_source" "server/udev"
[   315.490] (II) event5  - AT Translated Set 2 keyboard: is tagged by udev as: Keyboard
[   315.490] (II) event5  - AT Translated Set 2 keyboard: device is a keyboard
[   315.491] (II) event5  - AT Translated Set 2 keyboard: device removed
[   315.521] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio0/input/input5/event5"
[   315.521] (II) XINPUT: Adding extended input device "AT Translated Set 2 keyboard" (type: KEYBOARD, id 11)
[   315.523] (II) event5  - AT Translated Set 2 keyboard: is tagged by udev as: Keyboard
[   315.524] (II) event5  - AT Translated Set 2 keyboard: device is a keyboard
[   315.525] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/event15)
[   315.525] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "libinput touchpad catchall"
[   315.525] (II) Using input driver 'libinput' for 'SynPS/2 Synaptics TouchPad'
[   315.526] (**) SynPS/2 Synaptics TouchPad: always reports core events
[   315.526] (**) Option "Device" "/dev/input/event15"
[   315.526] (**) Option "_source" "server/udev"
[   315.528] (II) event15 - SynPS/2 Synaptics TouchPad: is tagged by udev as: Touchpad
[   315.528] (II) event15 - SynPS/2 Synaptics TouchPad: no resolution or size hints, assuming a size of 69x50mm
[   315.530] (II) event15 - SynPS/2 Synaptics TouchPad: device is a touchpad
[   315.530] (II) event15 - SynPS/2 Synaptics TouchPad: device removed
[   315.575] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio1/input/input12/event15"
[   315.575] (II) XINPUT: Adding extended input device "SynPS/2 Synaptics TouchPad" (type: TOUCHPAD, id 12)
[   315.577] (**) Option "AccelerationScheme" "none"
[   315.577] (**) SynPS/2 Synaptics TouchPad: (accel) selected scheme none/0
[   315.577] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration factor: 2.000
[   315.577] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration threshold: 4
[   315.579] (II) event15 - SynPS/2 Synaptics TouchPad: is tagged by udev as: Touchpad
[   315.579] (II) event15 - SynPS/2 Synaptics TouchPad: no resolution or size hints, assuming a size of 69x50mm
[   315.581] (II) event15 - SynPS/2 Synaptics TouchPad: device is a touchpad
[   315.582] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/mouse0)
[   315.582] (II) No input driver specified, ignoring this device.
[   315.582] (II) This device may have been added with another device file.
[   315.583] (II) config/udev: Adding input device TPPS/2 ALPS TrackPoint (/dev/input/event16)
[   315.583] (**) TPPS/2 ALPS TrackPoint: Applying InputClass "libinput pointer catchall"
[   315.583] (II) Using input driver 'libinput' for 'TPPS/2 ALPS TrackPoint'
[   315.583] (**) TPPS/2 ALPS TrackPoint: always reports core events
[   315.583] (**) Option "Device" "/dev/input/event16"
[   315.583] (**) Option "_source" "server/udev"
[   315.586] (II) event16 - TPPS/2 ALPS TrackPoint: is tagged by udev as: Mouse Pointingstick
[   315.586] (II) event16 - TPPS/2 ALPS TrackPoint: device is a pointer
[   315.587] (II) event16 - TPPS/2 ALPS TrackPoint: device removed
[   315.642] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio1/serio2/input/input17/event16"
[   315.642] (II) XINPUT: Adding extended input device "TPPS/2 ALPS TrackPoint" (type: MOUSE, id 13)
[   315.642] (**) Option "AccelerationScheme" "none"
[   315.642] (**) TPPS/2 ALPS TrackPoint: (accel) selected scheme none/0
[   315.642] (**) TPPS/2 ALPS TrackPoint: (accel) acceleration factor: 2.000
[   315.642] (**) TPPS/2 ALPS TrackPoint: (accel) acceleration threshold: 4
[   315.644] (II) event16 - TPPS/2 ALPS TrackPoint: is tagged by udev as: Mouse Pointingstick
[   315.645] (II) event16 - TPPS/2 ALPS TrackPoint: device is a pointer
[   315.647] (II) config/udev: Adding input device TPPS/2 ALPS TrackPoint (/dev/input/mouse1)
[   315.647] (II) No input driver specified, ignoring this device.
[   315.647] (II) This device may have been added with another device file.
[   315.648] (II) config/udev: Adding input device PC Speaker (/dev/input/event7)
[   315.648] (II) No input driver specified, ignoring this device.
[   315.648] (II) This device may have been added with another device file.
[   315.649] (II) config/udev: Adding input device ThinkPad Extra Buttons (/dev/input/event6)
[   315.649] (**) ThinkPad Extra Buttons: Applying InputClass "libinput keyboard catchall"
[   315.649] (II) Using input driver 'libinput' for 'ThinkPad Extra Buttons'
[   315.649] (**) ThinkPad Extra Buttons: always reports core events
[   315.649] (**) Option "Device" "/dev/input/event6"
[   315.649] (**) Option "_source" "server/udev"
[   315.651] (II) event6  - ThinkPad Extra Buttons: is tagged by udev as: Keyboard Switch
[   315.651] (II) event6  - ThinkPad Extra Buttons: device is a keyboard
[   315.652] (II) event6  - ThinkPad Extra Buttons: device removed
[   315.681] (**) Option "config_info" "udev:/sys/devices/platform/thinkpad_acpi/input/input7/event6"
[   315.681] (II) XINPUT: Adding extended input device "ThinkPad Extra Buttons" (type: KEYBOARD, id 14)
[   315.683] (II) event6  - ThinkPad Extra Buttons: is tagged by udev as: Keyboard Switch
[   315.683] (II) event6  - ThinkPad Extra Buttons: device is a keyboard
[   315.710] (II) event3  - Power Button: device removed
[   315.735] (II) event4  - Video Bus: device removed
[   315.788] (II) event0  - Power Button: device removed
[   315.815] (II) event2  - Sleep Button: device removed
[   315.842] (II) event14 - Integrated Camera: Integrated C: device removed
[   315.895] (II) event5  - AT Translated Set 2 keyboard: device removed
[   315.921] (II) event15 - SynPS/2 Synaptics TouchPad: device removed
[   315.975] (II) event16 - TPPS/2 ALPS TrackPoint: device removed
[   316.028] (II) event6  - ThinkPad Extra Buttons: device removed
[   316.055] (II) UnloadModule: "libinput"
[   316.055] (II) UnloadModule: "libinput"
[   316.055] (II) UnloadModule: "libinput"
[   316.055] (II) UnloadModule: "libinput"
[   316.055] (II) UnloadModule: "libinput"
[   316.055] (II) UnloadModule: "libinput"
[   316.055] (II) UnloadModule: "libinput"
[   316.055] (II) UnloadModule: "libinput"
[   316.056] (II) UnloadModule: "libinput"
[   316.107] (II) Server terminated successfully (0). Closing log file.

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 78,161

Re: [SOLVED] lightDM screen black, xrandr outputs "Can't open display"

Check the lightdm logs, your journal and coredumpctl.
That X11 server launched w/o errors but terminated immediately, suggesting that lightdm (or at least the greater) insta-crashed.

---

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

redevined

Member

Registered: 2019-12-12

Posts: 6

Re: [SOLVED] lightDM screen black, xrandr outputs "Can't open display"

Thank you very much for helping me, I finally found the issue. I had a small typo in /etc/lightdm/lightdm.conf, that spelled "ligthdm-gtk-greeter" instead of "lightdm-gtk-greeter".

xrandr seemed to be a different problem, but I could also fix it by recreating the .Xauthority file.

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 78,161

Re: [SOLVED] lightDM screen black, xrandr outputs "Can't open display"

You probably previously tried to "sudo-fix" xrandr?

Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

---

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc