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#1 2019-07-16 14:25:20

maciekcube
Member
Registered: 2019-07-16
Posts: 11

Xbacklight stops working after Hibernation

So, I've just configured xbacklight following this archwiki article and after some time it randomly stops working (usually after Hibernation, but it's not always the case)

Echoing value to /sys/class/backlight/intel_backlight/brightness still works fine, so apparently it's just a Xbacklight issue.

In my ~/.local/share/xorg/Xorg.0.log I found the following:

[  2063.419] (**) intel(0): Found backlight control interface intel_backlight (type 'raw') for output eDP1
...
[  6183.368] (EE) intel(0): Failed to set backlight intel_backlight for output eDP1, disabling

Here's a full Xorg log:

[ 11092.470] (WW) Failed to open protocol names file lib/xorg/protocol.txt
[ 11092.470] 
X.Org X Server 1.20.5
X Protocol Version 11, Revision 0
[ 11092.470] Build Operating System: Linux Arch Linux
[ 11092.470] Current Operating System: Linux ciek 5.2.0-arch2-1-ARCH #1 SMP PREEMPT Mon Jul 8 18:18:54 UTC 2019 x86_64
[ 11092.470] Kernel command line: BOOT_IMAGE=/vmlinuz-linux root=UUID=4b530b19-b6b4-4787-8c86-87215a59db54 rw audit=0 loglevel=3 quiet
[ 11092.470] Build Date: 30 June 2019  09:52:01AM
[ 11092.470]  
[ 11092.470] Current version of pixman: 0.38.4
[ 11092.470] 	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
[ 11092.470] Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 11092.471] (==) Log file: "/home/m/.local/share/xorg/Xorg.0.log", Time: Tue Jul 16 14:44:02 2019
[ 11092.471] (==) Using config directory: "/etc/X11/xorg.conf.d"
[ 11092.471] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 11092.471] (==) No Layout section.  Using the first Screen section.
[ 11092.471] (==) No screen section available. Using defaults.
[ 11092.471] (**) |-->Screen "Default Screen Section" (0)
[ 11092.471] (**) |   |-->Monitor "<default monitor>"
[ 11092.471] (==) No device specified for screen "Default Screen Section".
	Using the first device section listed.
[ 11092.471] (**) |   |-->Device "Intel Graphics"
[ 11092.471] (==) No monitor specified for screen "Default Screen Section".
	Using a default monitor configuration.
[ 11092.471] (==) Automatically adding devices
[ 11092.471] (==) Automatically enabling devices
[ 11092.471] (==) Automatically adding GPU devices
[ 11092.471] (==) Automatically binding GPU devices
[ 11092.471] (==) Max clients allowed: 256, resource mask: 0x1fffff
[ 11092.471] (WW) The directory "/usr/share/fonts/misc" does not exist.
[ 11092.471] 	Entry deleted from font path.
[ 11092.471] (WW) The directory "/usr/share/fonts/OTF" does not exist.
[ 11092.471] 	Entry deleted from font path.
[ 11092.471] (WW) The directory "/usr/share/fonts/Type1" does not exist.
[ 11092.471] 	Entry deleted from font path.
[ 11092.471] (WW) The directory "/usr/share/fonts/100dpi" does not exist.
[ 11092.471] 	Entry deleted from font path.
[ 11092.471] (WW) The directory "/usr/share/fonts/75dpi" does not exist.
[ 11092.471] 	Entry deleted from font path.
[ 11092.471] (==) FontPath set to:
	/usr/share/fonts/TTF
[ 11092.471] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 11092.471] (II) The server relies on udev to provide the list of input devices.
	If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 11092.471] (II) Module ABI versions:
[ 11092.471] 	X.Org ANSI C Emulation: 0.4
[ 11092.471] 	X.Org Video Driver: 24.0
[ 11092.471] 	X.Org XInput driver : 24.1
[ 11092.471] 	X.Org Server Extension : 10.0
[ 11092.472] (++) using VT number 1

[ 11092.473] (II) systemd-logind: took control of session /org/freedesktop/login1/session/_311
[ 11092.474] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 11092.475] (II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 10 paused 0
[ 11092.475] (II) xfree86: Adding drm device (/dev/dri/card1)
[ 11092.476] (II) systemd-logind: got fd for /dev/dri/card1 226:1 fd 11 paused 0
[ 11092.477] (--) PCI:*(0@0:2:0) 8086:1916:17aa:3824 rev 7, Mem @ 0x92000000/16777216, 0xa0000000/268435456, I/O @ 0x00005000/64, BIOS @ 0x????????/131072
[ 11092.477] (--) PCI: (3@0:0:0) 10de:134f:17aa:3824 rev 162, Mem @ 0x93000000/16777216, 0x80000000/268435456, 0x90000000/33554432, I/O @ 0x00003000/128
[ 11092.477] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
[ 11092.477] (II) LoadModule: "glx"
[ 11092.478] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 11092.479] (II) Module glx: vendor="X.Org Foundation"
[ 11092.479] 	compiled for 1.20.5, module version = 1.0.0
[ 11092.479] 	ABI class: X.Org Server Extension, version 10.0
[ 11092.479] (II) LoadModule: "intel"
[ 11092.479] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[ 11092.479] (II) Module intel: vendor="X.Org Foundation"
[ 11092.479] 	compiled for 1.20.4, module version = 2.99.917
[ 11092.479] 	Module class: X.Org Video Driver
[ 11092.479] 	ABI class: X.Org Video Driver, version 24.0
[ 11092.479] (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
[ 11092.480] (II) intel: Driver for Intel(R) HD Graphics
[ 11092.480] (II) intel: Driver for Intel(R) Iris(TM) Graphics
[ 11092.480] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics
[ 11092.480] xf86EnableIOPorts: failed to set IOPL for I/O (Operation not permitted)
[ 11092.480] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20190417
[ 11092.480] (II) intel(0): SNA compiled from 2.99.917-863-g6afed33b
[ 11092.496] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card support
[ 11092.497] (--) intel(0): Integrated Graphics Chipset: Intel(R) HD Graphics 520
[ 11092.497] (--) intel(0): CPU: x86-64, sse2, sse3, ssse3, sse4.1, sse4.2, avx, avx2; using a maximum of 2 threads
[ 11092.497] (II) intel(0): Creating default Display subsection in Screen section
	"Default Screen Section" for depth/fbbpp 24/32
[ 11092.497] (==) intel(0): Depth 24, (--) framebuffer bpp 32
[ 11092.497] (==) intel(0): RGB weight 888
[ 11092.497] (==) intel(0): Default visual is TrueColor
[ 11092.497] (**) intel(0): Option "Backlight" "intel_backlight"
[ 11092.497] (II) intel(0): Output eDP1 has no monitor section
[ 11092.497] (**) intel(0): Found backlight control interface intel_backlight (type 'raw') for output eDP1
[ 11092.497] (II) intel(0): Enabled output eDP1
[ 11092.497] (II) intel(0): Output HDMI1 has no monitor section
[ 11092.498] (II) intel(0): Enabled output HDMI1
[ 11092.498] (II) intel(0): Output DP1 has no monitor section
[ 11092.498] (II) intel(0): Enabled output DP1
[ 11092.498] (II) intel(0): Output HDMI2 has no monitor section
[ 11092.498] (II) intel(0): Enabled output HDMI2
[ 11092.498] (--) intel(0): Using a maximum size of 256x256 for hardware cursors
[ 11092.498] (II) intel(0): Output VIRTUAL1 has no monitor section
[ 11092.498] (II) intel(0): Enabled output VIRTUAL1
[ 11092.498] (--) intel(0): Output eDP1 using initial mode 1366x768 on pipe 0
[ 11092.498] (==) intel(0): TearFree disabled
[ 11092.498] (==) intel(0): Using gamma correction (1.0, 1.0, 1.0)
[ 11092.498] (==) intel(0): DPI set to (96, 96)
[ 11092.498] (II) Loading sub module "dri3"
[ 11092.498] (II) LoadModule: "dri3"
[ 11092.498] (II) Module "dri3" already built-in
[ 11092.498] (II) Loading sub module "dri2"
[ 11092.498] (II) LoadModule: "dri2"
[ 11092.498] (II) Module "dri2" already built-in
[ 11092.498] (II) Loading sub module "present"
[ 11092.498] (II) LoadModule: "present"
[ 11092.498] (II) Module "present" already built-in
[ 11092.498] (II) intel(0): SNA initialized with Skylake (gen9) backend
[ 11092.498] (==) intel(0): Backing store enabled
[ 11092.498] (==) intel(0): Silken mouse disabled
[ 11092.498] (II) intel(0): HW Cursor enabled
[ 11092.498] (==) intel(0): DPMS enabled
[ 11092.499] (==) intel(0): Display hotplug detection enabled
[ 11092.499] (II) intel(0): [DRI2] Setup complete
[ 11092.499] (II) intel(0): [DRI2]   DRI driver: i965
[ 11092.499] (II) intel(0): [DRI2]   VDPAU driver: va_gl
[ 11092.499] (II) intel(0): direct rendering: DRI2 DRI3 enabled
[ 11092.499] (II) intel(0): hardware support for Present enabled
[ 11092.499] (II) Initializing extension Generic Event Extension
[ 11092.499] (II) Initializing extension SHAPE
[ 11092.499] (II) Initializing extension MIT-SHM
[ 11092.499] (II) Initializing extension XInputExtension
[ 11092.499] (II) Initializing extension XTEST
[ 11092.499] (II) Initializing extension BIG-REQUESTS
[ 11092.499] (II) Initializing extension SYNC
[ 11092.499] (II) Initializing extension XKEYBOARD
[ 11092.499] (II) Initializing extension XC-MISC
[ 11092.499] (II) Initializing extension SECURITY
[ 11092.499] (II) Initializing extension XFIXES
[ 11092.499] (II) Initializing extension RENDER
[ 11092.499] (II) Initializing extension RANDR
[ 11092.499] (II) Initializing extension COMPOSITE
[ 11092.499] (II) Initializing extension DAMAGE
[ 11092.499] (II) Initializing extension MIT-SCREEN-SAVER
[ 11092.499] (II) Initializing extension DOUBLE-BUFFER
[ 11092.499] (II) Initializing extension RECORD
[ 11092.499] (II) Initializing extension DPMS
[ 11092.499] (II) Initializing extension Present
[ 11092.499] (II) Initializing extension DRI3
[ 11092.499] (II) Initializing extension X-Resource
[ 11092.499] (II) Initializing extension XVideo
[ 11092.499] (II) Initializing extension XVideo-MotionCompensation
[ 11092.499] (II) Initializing extension GLX
[ 11092.509] (II) AIGLX: Loaded and initialized i965
[ 11092.509] (II) GLX: Initialized DRI2 GL provider for screen 0
[ 11092.509] (II) Initializing extension XFree86-VidModeExtension
[ 11092.509] (II) Initializing extension XFree86-DGA
[ 11092.509] (II) Initializing extension XFree86-DRI
[ 11092.509] (II) Initializing extension DRI2
[ 11092.510] (II) intel(0): switch to mode 1366x768@60.0 on eDP1 using pipe 0, position (0, 0), rotation normal, reflection none
[ 11092.515] (II) intel(0): Setting screen physical size to 361 x 203
[ 11092.544] (II) config/udev: Adding input device Power Button (/dev/input/event2)
[ 11092.544] (**) Power Button: Applying InputClass "libinput keyboard catchall"
[ 11092.544] (**) Power Button: Applying InputClass "system-keyboard"
[ 11092.544] (II) LoadModule: "libinput"
[ 11092.544] (II) Loading /usr/lib/xorg/modules/input/libinput_drv.so
[ 11092.545] (II) Module libinput: vendor="X.Org Foundation"
[ 11092.545] 	compiled for 1.20.3, module version = 0.28.2
[ 11092.545] 	Module class: X.Org XInput Driver
[ 11092.545] 	ABI class: X.Org XInput driver, version 24.1
[ 11092.545] (II) Using input driver 'libinput' for 'Power Button'
[ 11092.546] (II) systemd-logind: got fd for /dev/input/event2 13:66 fd 16 paused 0
[ 11092.546] (**) Power Button: always reports core events
[ 11092.546] (**) Option "Device" "/dev/input/event2"
[ 11092.546] (**) Option "_source" "server/udev"
[ 11092.548] (II) event2  - Power Button: is tagged by udev as: Keyboard
[ 11092.548] (II) event2  - Power Button: device is a keyboard
[ 11092.548] (II) event2  - Power Button: device removed
[ 11092.548] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input2/event2"
[ 11092.548] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
[ 11092.548] (**) Option "xkb_layout" "pl"
[ 11092.566] (II) event2  - Power Button: is tagged by udev as: Keyboard
[ 11092.566] (II) event2  - Power Button: device is a keyboard
[ 11092.566] (II) config/udev: Adding input device Video Bus (/dev/input/event7)
[ 11092.566] (**) Video Bus: Applying InputClass "libinput keyboard catchall"
[ 11092.566] (**) Video Bus: Applying InputClass "system-keyboard"
[ 11092.566] (II) Using input driver 'libinput' for 'Video Bus'
[ 11092.567] (II) systemd-logind: got fd for /dev/input/event7 13:71 fd 19 paused 0
[ 11092.567] (**) Video Bus: always reports core events
[ 11092.567] (**) Option "Device" "/dev/input/event7"
[ 11092.567] (**) Option "_source" "server/udev"
[ 11092.568] (II) event7  - Video Bus: is tagged by udev as: Keyboard
[ 11092.568] (II) event7  - Video Bus: device is a keyboard
[ 11092.568] (II) event7  - Video Bus: device removed
[ 11092.568] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input8/event7"
[ 11092.568] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 7)
[ 11092.568] (**) Option "xkb_layout" "pl"
[ 11092.569] (II) event7  - Video Bus: is tagged by udev as: Keyboard
[ 11092.569] (II) event7  - Video Bus: device is a keyboard
[ 11092.569] (II) config/udev: Adding input device Video Bus (/dev/input/event8)
[ 11092.569] (**) Video Bus: Applying InputClass "libinput keyboard catchall"
[ 11092.569] (**) Video Bus: Applying InputClass "system-keyboard"
[ 11092.569] (II) Using input driver 'libinput' for 'Video Bus'
[ 11092.570] (II) systemd-logind: got fd for /dev/input/event8 13:72 fd 20 paused 0
[ 11092.570] (**) Video Bus: always reports core events
[ 11092.570] (**) Option "Device" "/dev/input/event8"
[ 11092.570] (**) Option "_source" "server/udev"
[ 11092.571] (II) event8  - Video Bus: is tagged by udev as: Keyboard
[ 11092.571] (II) event8  - Video Bus: device is a keyboard
[ 11092.571] (II) event8  - Video Bus: device removed
[ 11092.571] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:42/LNXVIDEO:01/input/input9/event8"
[ 11092.571] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 8)
[ 11092.571] (**) Option "xkb_layout" "pl"
[ 11092.572] (II) event8  - Video Bus: is tagged by udev as: Keyboard
[ 11092.572] (II) event8  - Video Bus: device is a keyboard
[ 11092.573] (II) config/udev: Adding input device Power Button (/dev/input/event1)
[ 11092.573] (**) Power Button: Applying InputClass "libinput keyboard catchall"
[ 11092.573] (**) Power Button: Applying InputClass "system-keyboard"
[ 11092.573] (II) Using input driver 'libinput' for 'Power Button'
[ 11092.573] (II) systemd-logind: got fd for /dev/input/event1 13:65 fd 21 paused 0
[ 11092.573] (**) Power Button: always reports core events
[ 11092.573] (**) Option "Device" "/dev/input/event1"
[ 11092.573] (**) Option "_source" "server/udev"
[ 11092.574] (II) event1  - Power Button: is tagged by udev as: Keyboard
[ 11092.574] (II) event1  - Power Button: device is a keyboard
[ 11092.574] (II) event1  - Power Button: device removed
[ 11092.574] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input1/event1"
[ 11092.574] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 9)
[ 11092.574] (**) Option "xkb_layout" "pl"
[ 11092.575] (II) event1  - Power Button: is tagged by udev as: Keyboard
[ 11092.575] (II) event1  - Power Button: device is a keyboard
[ 11092.575] (II) config/udev: Adding input device Lid Switch (/dev/input/event0)
[ 11092.575] (II) No input driver specified, ignoring this device.
[ 11092.575] (II) This device may have been added with another device file.
[ 11092.576] (II) config/udev: Adding input device EasyCamera:  EasyCamera (/dev/input/event6)
[ 11092.576] (**) EasyCamera:  EasyCamera: Applying InputClass "libinput keyboard catchall"
[ 11092.576] (**) EasyCamera:  EasyCamera: Applying InputClass "system-keyboard"
[ 11092.576] (II) Using input driver 'libinput' for 'EasyCamera:  EasyCamera'
[ 11092.577] (II) systemd-logind: got fd for /dev/input/event6 13:70 fd 22 paused 0
[ 11092.577] (**) EasyCamera:  EasyCamera: always reports core events
[ 11092.577] (**) Option "Device" "/dev/input/event6"
[ 11092.577] (**) Option "_source" "server/udev"
[ 11092.578] (II) event6  - EasyCamera:  EasyCamera: is tagged by udev as: Keyboard
[ 11092.578] (II) event6  - EasyCamera:  EasyCamera: device is a keyboard
[ 11092.578] (II) event6  - EasyCamera:  EasyCamera: device removed
[ 11092.578] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.0/input/input7/event6"
[ 11092.578] (II) XINPUT: Adding extended input device "EasyCamera:  EasyCamera" (type: KEYBOARD, id 10)
[ 11092.578] (**) Option "xkb_layout" "pl"
[ 11092.579] (II) event6  - EasyCamera:  EasyCamera: is tagged by udev as: Keyboard
[ 11092.579] (II) event6  - EasyCamera:  EasyCamera: device is a keyboard
[ 11092.579] (II) config/udev: Adding input device Ideapad extra buttons (/dev/input/event4)
[ 11092.579] (**) Ideapad extra buttons: Applying InputClass "libinput keyboard catchall"
[ 11092.579] (**) Ideapad extra buttons: Applying InputClass "system-keyboard"
[ 11092.579] (II) Using input driver 'libinput' for 'Ideapad extra buttons'
[ 11092.580] (II) systemd-logind: got fd for /dev/input/event4 13:68 fd 23 paused 0
[ 11092.580] (**) Ideapad extra buttons: always reports core events
[ 11092.580] (**) Option "Device" "/dev/input/event4"
[ 11092.580] (**) Option "_source" "server/udev"
[ 11092.581] (II) event4  - Ideapad extra buttons: is tagged by udev as: Keyboard
[ 11092.581] (II) event4  - Ideapad extra buttons: device is a keyboard
[ 11092.581] (II) event4  - Ideapad extra buttons: device removed
[ 11092.581] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:1f.0/PNP0C09:00/VPC2004:00/input/input5/event4"
[ 11092.581] (II) XINPUT: Adding extended input device "Ideapad extra buttons" (type: KEYBOARD, id 11)
[ 11092.581] (**) Option "xkb_layout" "pl"
[ 11092.582] (II) event4  - Ideapad extra buttons: is tagged by udev as: Keyboard
[ 11092.582] (II) event4  - Ideapad extra buttons: device is a keyboard
[ 11092.583] (II) config/udev: Adding input device HDA Intel PCH Mic (/dev/input/event9)
[ 11092.583] (II) No input driver specified, ignoring this device.
[ 11092.583] (II) This device may have been added with another device file.
[ 11092.583] (II) config/udev: Adding input device HDA Intel PCH Headphone (/dev/input/event10)
[ 11092.583] (II) No input driver specified, ignoring this device.
[ 11092.583] (II) This device may have been added with another device file.
[ 11092.583] (II) config/udev: Adding input device HDA Intel PCH HDMI/DP,pcm=3 (/dev/input/event11)
[ 11092.583] (II) No input driver specified, ignoring this device.
[ 11092.583] (II) This device may have been added with another device file.
[ 11092.584] (II) config/udev: Adding input device HDA Intel PCH HDMI/DP,pcm=7 (/dev/input/event12)
[ 11092.584] (II) No input driver specified, ignoring this device.
[ 11092.584] (II) This device may have been added with another device file.
[ 11092.584] (II) config/udev: Adding input device HDA Intel PCH HDMI/DP,pcm=8 (/dev/input/event13)
[ 11092.584] (II) No input driver specified, ignoring this device.
[ 11092.584] (II) This device may have been added with another device file.
[ 11092.584] (II) config/udev: Adding input device HDA Intel PCH HDMI/DP,pcm=9 (/dev/input/event14)
[ 11092.584] (II) No input driver specified, ignoring this device.
[ 11092.584] (II) This device may have been added with another device file.
[ 11092.584] (II) config/udev: Adding input device HDA Intel PCH HDMI/DP,pcm=10 (/dev/input/event15)
[ 11092.585] (II) No input driver specified, ignoring this device.
[ 11092.585] (II) This device may have been added with another device file.
[ 11092.585] (II) config/udev: Adding input device AT Translated Set 2 keyboard (/dev/input/event3)
[ 11092.585] (**) AT Translated Set 2 keyboard: Applying InputClass "libinput keyboard catchall"
[ 11092.585] (**) AT Translated Set 2 keyboard: Applying InputClass "system-keyboard"
[ 11092.585] (II) Using input driver 'libinput' for 'AT Translated Set 2 keyboard'
[ 11092.586] (II) systemd-logind: got fd for /dev/input/event3 13:67 fd 24 paused 0
[ 11092.586] (**) AT Translated Set 2 keyboard: always reports core events
[ 11092.586] (**) Option "Device" "/dev/input/event3"
[ 11092.586] (**) Option "_source" "server/udev"
[ 11092.587] (II) event3  - AT Translated Set 2 keyboard: is tagged by udev as: Keyboard
[ 11092.587] (II) event3  - AT Translated Set 2 keyboard: device is a keyboard
[ 11092.587] (II) event3  - AT Translated Set 2 keyboard: device removed
[ 11092.587] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio0/input/input3/event3"
[ 11092.587] (II) XINPUT: Adding extended input device "AT Translated Set 2 keyboard" (type: KEYBOARD, id 12)
[ 11092.587] (**) Option "xkb_layout" "pl"
[ 11092.588] (II) event3  - AT Translated Set 2 keyboard: is tagged by udev as: Keyboard
[ 11092.588] (II) event3  - AT Translated Set 2 keyboard: device is a keyboard
[ 11092.589] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/event5)
[ 11092.589] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "libinput touchpad catchall"
[ 11092.589] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "touchpad catchall"
[ 11092.589] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "Default clickpad buttons"
[ 11092.589] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "touchpad"
[ 11092.589] (II) LoadModule: "synaptics"
[ 11092.589] (II) Loading /usr/lib/xorg/modules/input/synaptics_drv.so
[ 11092.589] (II) Module synaptics: vendor="X.Org Foundation"
[ 11092.589] 	compiled for 1.20.0, module version = 1.9.1
[ 11092.589] 	Module class: X.Org XInput Driver
[ 11092.589] 	ABI class: X.Org XInput driver, version 24.1
[ 11092.589] (II) Using input driver 'synaptics' for 'SynPS/2 Synaptics TouchPad'
[ 11092.590] (II) systemd-logind: got fd for /dev/input/event5 13:69 fd 25 paused 0
[ 11092.590] (**) SynPS/2 Synaptics TouchPad: always reports core events
[ 11092.590] (**) Option "Device" "/dev/input/event5"
[ 11092.590] (--) synaptics: SynPS/2 Synaptics TouchPad: x-axis range 1314 - 5670 (res 44)
[ 11092.590] (--) synaptics: SynPS/2 Synaptics TouchPad: y-axis range 1098 - 4794 (res 76)
[ 11092.590] (--) synaptics: SynPS/2 Synaptics TouchPad: pressure range 0 - 255
[ 11092.590] (--) synaptics: SynPS/2 Synaptics TouchPad: finger width range 0 - 15
[ 11092.590] (--) synaptics: SynPS/2 Synaptics TouchPad: buttons: left right double triple
[ 11092.590] (--) synaptics: SynPS/2 Synaptics TouchPad: Vendor 0x2 Product 0x7
[ 11092.590] (**) Option "FingerLow" "30"
[ 11092.590] (**) Option "FingerHigh" "50"
[ 11092.590] (**) Option "MaxTapTime" "125"
[ 11092.590] (**) Option "EmulateTwoFingerMinZ" "40"
[ 11092.590] (**) Option "EmulateTwoFingerMinW" "8"
[ 11092.590] (**) Option "VertScrollDelta" "-60"
[ 11092.590] (**) Option "HorizScrollDelta" "-60"
[ 11092.590] (**) Option "VertEdgeScroll" "off"
[ 11092.590] (**) Option "HorizEdgeScroll" "off"
[ 11092.590] (**) Option "VertTwoFingerScroll" "on"
[ 11092.590] (**) Option "HorizTwoFingerScroll" "on"
[ 11092.590] (**) Option "TapButton1" "1"
[ 11092.590] (**) Option "TapButton2" "3"
[ 11092.590] (**) Option "TapButton3" "2"
[ 11092.590] (**) Option "CircularScrolling" "on"
[ 11092.590] (**) Option "CircScrollTrigger" "2"
[ 11092.590] (**) Option "CoastingSpeed" "0"
[ 11092.590] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
[ 11092.590] (**) SynPS/2 Synaptics TouchPad: always reports core events
[ 11092.590] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio1/input/input6/event5"
[ 11092.590] (II) XINPUT: Adding extended input device "SynPS/2 Synaptics TouchPad" (type: TOUCHPAD, id 13)
[ 11092.590] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) MinSpeed is now constant deceleration 2.5
[ 11092.590] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) MaxSpeed is now 1.75
[ 11092.591] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) AccelFactor is now 0.035
[ 11092.591] (**) SynPS/2 Synaptics TouchPad: (accel) keeping acceleration scheme 1
[ 11092.591] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration profile 1
[ 11092.591] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration factor: 2.000
[ 11092.591] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration threshold: 4
[ 11092.591] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
[ 11092.591] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/mouse0)
[ 11092.591] (**) SynPS/2 Synaptics TouchPad: Ignoring device from InputClass "touchpad ignore duplicates"
[ 11092.621] (EE) Error loading keymap /tmp/server-0.xkm
[ 11092.655] (II) intel(0): EDID vendor "CMN", prod id 5596
[ 11092.655] (II) intel(0): Printing DDC gathered Modelines:
[ 11092.655] (II) intel(0): Modeline "1366x768"x0.0   76.42  1366 1434 1479 1592  768 772 779 800 -hsync -vsync (48.0 kHz eP)
[ 12003.697] (EE) intel(0): Failed to set backlight intel_backlight for output eDP1, disabling

And here is a Xbacklight strace output:

execve("/usr/bin/xbacklight", ["xbacklight"], 0x7ffe1cbb2740 /* 45 vars */) = 0
brk(NULL)                               = 0x559bbca8c000
arch_prctl(0x3001 /* ARCH_??? */, 0x7ffebbbd51d0) = -1 EINVAL (Invalid argument)
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=102461, ...}) = 0
mmap(NULL, 102461, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fc317e8f000
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxcb-randr.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 p\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=67288, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc317e8d000
mmap(NULL, 69672, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc317e7b000
mprotect(0x7fc317e82000, 36864, PROT_NONE) = 0
mmap(0x7fc317e82000, 20480, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x7fc317e82000
mmap(0x7fc317e87000, 12288, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xc000) = 0x7fc317e87000
mmap(0x7fc317e8b000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0x7fc317e8b000
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxcb-util.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300#\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=22208, ...}) = 0
mmap(NULL, 2117648, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc317c75000
mprotect(0x7fc317c79000, 2097152, PROT_NONE) = 0
mmap(0x7fc317e79000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4000) = 0x7fc317e79000
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxcb.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 \300\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=165624, ...}) = 0
mmap(NULL, 168200, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc317c4b000
mmap(0x7fc317c57000, 77824, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xc000) = 0x7fc317c57000
mmap(0x7fc317c6a000, 36864, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1f000) = 0x7fc317c6a000
mmap(0x7fc317c73000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x27000) = 0x7fc317c73000
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360o\2\0\0\0\0\0"..., 832) = 832
lseek(3, 64, SEEK_SET)                  = 64
read(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784) = 784
lseek(3, 848, SEEK_SET)                 = 848
read(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32) = 32
lseek(3, 880, SEEK_SET)                 = 880
read(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\250\257l\201\313(\243{\363\245F\227\v\366B$"..., 68) = 68
fstat(3, {st_mode=S_IFREG|0755, st_size=2133648, ...}) = 0
lseek(3, 64, SEEK_SET)                  = 64
read(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784) = 784
lseek(3, 848, SEEK_SET)                 = 848
read(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32) = 32
lseek(3, 880, SEEK_SET)                 = 880
read(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\250\257l\201\313(\243{\363\245F\227\v\366B$"..., 68) = 68
mmap(NULL, 1844408, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc317a88000
mprotect(0x7fc317aad000, 1654784, PROT_NONE) = 0
mmap(0x7fc317aad000, 1351680, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x25000) = 0x7fc317aad000
mmap(0x7fc317bf7000, 299008, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16f000) = 0x7fc317bf7000
mmap(0x7fc317c41000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b8000) = 0x7fc317c41000
mmap(0x7fc317c47000, 13496, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fc317c47000
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libXau.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 \20\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=13960, ...}) = 0
mmap(NULL, 16424, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc317a83000
mmap(0x7fc317a84000, 4096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0x7fc317a84000
mmap(0x7fc317a85000, 4096, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fc317a85000
mmap(0x7fc317a86000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fc317a86000
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libXdmcp.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0  \0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=26224, ...}) = 0
mmap(NULL, 28688, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc317a7b000
mmap(0x7fc317a7d000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fc317a7d000
mmap(0x7fc317a7f000, 8192, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4000) = 0x7fc317a7f000
mmap(0x7fc317a81000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x5000) = 0x7fc317a81000
close(3)                                = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc317a79000
arch_prctl(ARCH_SET_FS, 0x7fc317a7a280) = 0
mprotect(0x7fc317c41000, 12288, PROT_READ) = 0
mprotect(0x7fc317a81000, 4096, PROT_READ) = 0
mprotect(0x7fc317a86000, 4096, PROT_READ) = 0
mprotect(0x7fc317c73000, 4096, PROT_READ) = 0
mprotect(0x7fc317e79000, 4096, PROT_READ) = 0
mprotect(0x7fc317e8b000, 4096, PROT_READ) = 0
mprotect(0x559bbb89d000, 4096, PROT_READ) = 0
mprotect(0x7fc317ed3000, 4096, PROT_READ) = 0
munmap(0x7fc317e8f000, 102461)          = 0
brk(NULL)                               = 0x559bbca8c000
brk(0x559bbcaad000)                     = 0x559bbcaad000
socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0) = 3
connect(3, {sa_family=AF_UNIX, sun_path=@"/tmp/.X11-unix/X0"}, 20) = 0
getpeername(3, {sa_family=AF_UNIX, sun_path=@"/tmp/.X11-unix/X0"}, [124->20]) = 0
uname({sysname="Linux", nodename="ciek", ...}) = 0
access("/home/m/.Xauthority", R_OK)     = 0
openat(AT_FDCWD, "/home/m/.Xauthority", O_RDONLY) = 4
fstat(4, {st_mode=S_IFREG|0600, st_size=49, ...}) = 0
read(4, "\1\0\0\4ciek\0\0010\0\22MIT-MAGIC-COOKIE-1\0"..., 4096) = 49
read(4, "", 4096)                       = 0
close(4)                                = 0
getsockname(3, {sa_family=AF_UNIX}, [124->2]) = 0
fcntl(3, F_GETFL)                       = 0x2 (flags O_RDWR)
fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="l\0\v\0\0\0\22\0\20\0\0\0", iov_len=12}, {iov_base="", iov_len=0}, {iov_base="MIT-MAGIC-COOKIE-1", iov_len=18}, {iov_base="\0\0", iov_len=2}, {iov_base="zb\306\355.\307~\270\315\346\375\231zs\224S", iov_len=16}, {iov_base="", iov_len=0}], 6) = 48
recvfrom(3, 0x559bbca8d5c0, 8, 0, NULL, NULL) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=3, events=POLLIN}], 1, -1)    = 1 ([{fd=3, revents=POLLIN}])
recvfrom(3, "\1\0\v\0\0\0g\2", 8, 0, NULL, NULL) = 8
recvfrom(3, "\210.\267\0\0\0\0\4\377\377\37\0\0\1\0\0\24\0\377\377\1\7\0\0  \10\377\0\0\0\0"..., 2460, 0, NULL, NULL) = 2460
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="b\0\4\0\5\0\0\0RANDR\0\0\0", iov_len=16}], 1) = 16
poll([{fd=3, events=POLLIN}], 1, -1)    = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\1\0\0\0\0\0\1\214Y\223\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\214\0\3\0\1\0\0\0\2\0\0\0", iov_len=12}], 1) = 12
poll([{fd=3, events=POLLIN}], 1, -1)    = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\2\0\0\0\0\0\1\0\0\0\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\20\1\5\0\t\0\0\0Backlight\0\0\0\20\1\5\0\t\0\0\0BACK"..., iov_len=40}], 1) = 40
poll([{fd=3, events=POLLIN}], 1, -1)    = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\3\0\0\0\0\0Q\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 64
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\214\31\2\0i\1\0\0", iov_len=8}], 1) = 8
poll([{fd=3, events=POLLIN}], 1, -1)    = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\5\0\365\0\0\0\366A\251\0\266B\251\0\4\0\5\0\30\0\260\0\0\0\0\0\0\0\0\0"..., iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 1012
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\214\17\7\0C\0\0\0Q\0\0\0\0\0\0\0\0\0\0\0\4\0\0\0\0\0\0\0", iov_len=28}], 1) = 28
poll([{fd=3, events=POLLIN}], 1, -1)    = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\6\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\214\17\7\0D\0\0\0Q\0\0\0\0\0\0\0\0\0\0\0\4\0\0\0\0\0\0\0", iov_len=28}], 1) = 28
poll([{fd=3, events=POLLIN}], 1, -1)    = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\7\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\214\17\7\0E\0\0\0Q\0\0\0\0\0\0\0\0\0\0\0\4\0\0\0\0\0\0\0", iov_len=28}], 1) = 28
poll([{fd=3, events=POLLIN}], 1, -1)    = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\10\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\214\17\7\0F\0\0\0Q\0\0\0\0\0\0\0\0\0\0\0\4\0\0\0\0\0\0\0", iov_len=28}], 1) = 28
poll([{fd=3, events=POLLIN}], 1, -1)    = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\t\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\214\17\7\0G\0\0\0Q\0\0\0\0\0\0\0\0\0\0\0\4\0\0\0\0\0\0\0", iov_len=28}], 1) = 28
poll([{fd=3, events=POLLIN}], 1, -1)    = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="+\0\1\0", iov_len=4}], 1) = 4
poll([{fd=3, events=POLLIN}], 1, -1)    = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\1\v\0\0\0\0\0\6\0 \3\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
exit_group(0)                           = ?
+++ exited with 0 +++

Thanks in advance for help

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