execve("/usr/lib/systemd/systemd-backlight", ["/usr/lib/systemd/systemd-backlig"..., "load", "backlight:apci_video0"], [/* 15 vars */]) = 0
brk(0)                                  = 0x7f20b9645000
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=191931, ...}) = 0
mmap(NULL, 191931, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f20b7bf4000
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) = 0x7f20b7bf3000
mmap(NULL, 2217104, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f20b77e5000
mprotect(0x7f20b77fd000, 2097152, PROT_NONE) = 0
mmap(0x7f20b79fd000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18000) = 0x7f20b79fd000
mmap(0x7f20b79ff000, 13456, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f20b79ff000
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) = 0x7f20b7437000
mprotect(0x7f20b75db000, 2097152, PROT_NONE) = 0
mmap(0x7f20b77db000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1a4000) = 0x7f20b77db000
mmap(0x7f20b77e1000, 16144, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f20b77e1000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f20b7bf2000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f20b7bf0000
arch_prctl(ARCH_SET_FS, 0x7f20b7bf0740) = 0
mprotect(0x7f20b77db000, 16384, PROT_READ) = 0
mprotect(0x7f20b79fd000, 4096, PROT_READ) = 0
mprotect(0x7f20b7c33000, 4096, PROT_READ) = 0
mprotect(0x7f20b7c23000, 4096, PROT_READ) = 0
munmap(0x7f20b7bf4000, 191931)          = 0
set_tid_address(0x7f20b7bf0a10)         = 4198
set_robust_list(0x7f20b7bf0a20, 24)     = 0
rt_sigaction(SIGRTMIN, {0x7f20b77eab10, [], SA_RESTORER|SA_SIGINFO, 0x7f20b77f44b0}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x7f20b77eaba0, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7f20b77f44b0}, 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)                                  = 0x7f20b9645000
brk(0x7f20b9666000)                     = 0x7f20b9666000
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) = 0x7f20b7c22000
read(3, "BOOT_IMAGE=/vmlinuz-linux root=U"..., 1024) = 82
close(3)                                = 0
munmap(0x7f20b7c22000, 4096)            = 0
ioctl(2, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0x7fffd1411570) = -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) = 0x7f20b7c22000
read(4, "# see udev(7) for details\n\n#udev"..., 4096) = 44
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0x7f20b7c22000, 4096)            = 0
stat("/sys/subsystem/backlight/devices/apci_video0", 0x7fffd1410f30) = -1 ENOENT (No such file or directory)
stat("/sys/bus/backlight/devices/apci_video0", 0x7fffd1410f30) = -1 ENOENT (No such file or directory)
stat("/sys/class/backlight/apci_video0", 0x7fffd1410f30) = -1 ENOENT (No such file or directory)
sendmsg(3, {msg_name(0)=NULL, msg_iov(4)=[{"PRIORITY=3\nSYSLOG_FACILITY=3\nCOD"..., 134}, {"MESSAGE=", 8}, {"Failed to get backlight or LED d"..., 88}, {"\n", 1}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 231
exit_group(1)                           = ?
+++ exited with 1 +++