execve("/usr/lib/systemd/systemd-backlight", ["/usr/lib/systemd/systemd-backlig"..., "load", "backlight:intel_backlight"], [/* 38 vars */]) = 0
brk(0)                                  = 0x7f876c816000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=250319, ...}) = 0
mmap(NULL, 250319, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f876c5db000
close(3)                                = 0
open("/usr/lib/libpthread.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\0000`\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=149301, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f876c5da000
mmap(NULL, 2217104, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f876c1db000
mprotect(0x7f876c1f3000, 2097152, PROT_NONE) = 0
mmap(0x7f876c3f3000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18000) = 0x7f876c3f3000
mmap(0x7f876c3f5000, 13456, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f876c3f5000
close(3)                                = 0
open("/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\20\1\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2047384, ...}) = 0
mmap(NULL, 3858192, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f876be2d000
mprotect(0x7f876bfd1000, 2097152, PROT_NONE) = 0
mmap(0x7f876c1d1000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1a4000) = 0x7f876c1d1000
mmap(0x7f876c1d7000, 16144, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f876c1d7000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f876c5d9000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f876c5d7000
arch_prctl(ARCH_SET_FS, 0x7f876c5d7740) = 0
mprotect(0x7f876c1d1000, 16384, PROT_READ) = 0
mprotect(0x7f876c3f3000, 4096, PROT_READ) = 0
mprotect(0x7f876c629000, 4096, PROT_READ) = 0
mprotect(0x7f876c619000, 4096, PROT_READ) = 0
munmap(0x7f876c5db000, 250319)          = 0
set_tid_address(0x7f876c5d7a10)         = 3359
set_robust_list(0x7f876c5d7a20, 24)     = 0
rt_sigaction(SIGRTMIN, {0x7f876c1e0b10, [], SA_RESTORER|SA_SIGINFO, 0x7f876c1ea4b0}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x7f876c1e0ba0, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7f876c1ea4b0}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
access("/proc/vz", F_OK)                = -1 ENOENT (No such file or directory)
brk(0)                                  = 0x7f876c816000
brk(0x7f876c837000)                     = 0x7f876c837000
open("/run/systemd/container", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/proc/cmdline", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f876c618000
read(3, "BOOT_IMAGE=/vmlinuz-linux root=/"..., 1024) = 124
close(3)                                = 0
munmap(0x7f876c618000, 4096)            = 0
ioctl(2, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0x7ffffc3627b0) = -1 ENOTTY (Inappropriate ioctl for device)
socket(PF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 3
getsockopt(3, SOL_SOCKET, SO_SNDBUF, [212992], [4]) = 0
setsockopt(3, SOL_SOCKET, 0x20 /* SO_??? */, [8388608], 4) = 0
setsockopt(3, SOL_SOCKET, SO_SNDTIMEO, "\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16) = 0
connect(3, {sa_family=AF_LOCAL, sun_path="/run/systemd/journal/socket"}, 29) = 0
umask(022)                              = 022
stat("/var/lib/systemd", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
mkdir("/var/lib/systemd/backlight", 0755) = -1 EEXIST (File exists)
stat("/var/lib/systemd/backlight", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/etc/udev/udev.conf", O_RDONLY|O_CLOEXEC) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=44, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f876c618000
read(4, "# see udev(7) for details\n\n#udev"..., 4096) = 44
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0x7f876c618000, 4096)            = 0
stat("/sys/subsystem/backlight/devices/intel_backlight", 0x7ffffc362170) = -1 ENOENT (No such file or directory)
stat("/sys/bus/backlight/devices/intel_backlight", 0x7ffffc362170) = -1 ENOENT (No such file or directory)
stat("/sys/class/backlight/intel_backlight", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
readlink("/sys/class/backlight/intel_backlight", "../../devices/pci0000:00/0000:00"..., 1024) = 75
stat("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/uevent", {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0
lstat("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/max_brightness", {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
open("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/max_brightness", O_RDONLY|O_CLOEXEC) = 4
read(4, "4648\n", 4096)                 = 5
close(4)                                = 0
open("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/uevent", O_RDONLY|O_CLOEXEC) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f876c618000
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0x7f876c618000, 4096)            = 0
readlink("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/subsystem", "../../../../../../../class/backl"..., 1024) = 36
open("/run/udev/data/+backlight:intel_backlight", O_RDONLY|O_CLOEXEC) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=145, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f876c618000
read(4, "I:883262\nE:ID_PATH=pci-0000:00:0"..., 4096) = 145
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0x7f876c618000, 4096)            = 0
open("/proc/cmdline", O_RDONLY|O_CLOEXEC) = 4
fstat(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f876c618000
read(4, "BOOT_IMAGE=/vmlinuz-linux root=/"..., 1024) = 124
close(4)                                = 0
munmap(0x7f876c618000, 4096)            = 0
lstat("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/type", {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
open("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/type", O_RDONLY|O_CLOEXEC) = 4
read(4, "raw\n", 4096)                  = 4
close(4)                                = 0
readlink("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1", 0x7ffffc361e00, 1024) = -1 EINVAL (Invalid argument)
stat("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/uevent", {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0
readlink("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/subsystem", "../../../../../../class/drm", 1024) = 27
open("/var/lib/systemd/backlight/pci-0000:00:02.0:backlight:intel_backlight", O_RDONLY|O_CLOEXEC) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=5, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f876c618000
read(4, "4648\n", 4096)                 = 5
close(4)                                = 0
munmap(0x7f876c618000, 4096)            = 0
lstat("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/brightness", {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0
open("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/brightness", O_WRONLY|O_CLOEXEC) = 4
write(4, "4648", 4)                     = 4
close(4)                                = 0
exit_group(0)                           = ?
+++ exited with 0 +++