Comment # 16 on bug 1137688 from S. B.

(In reply to Imobach Gonzalez Sosa from comment #15)
> Actually, you could even try to load system settings with "sysctl --system".
> It should give you a clue about where it is reading the values from.

Ah yes, that helped:

sysctl --system
* Applying /boot/sysctl.conf-5.3.12-1-default ...
kernel.hung_task_timeout_secs = 0
kernel.msgmax = 65536
kernel.msgmnb = 65536
kernel.shmmax = 0xffffffffffffffff
kernel.shmall = 0x0fffffffffffff00
vm.dirty_ratio = 20
* Applying /etc/sysctl.d/30-yast.conf ...
kernel.sysrq = 1
net.ipv4.ip_forward = 0
net.ipv6.conf.all.forwarding = 0
net.ipv4.tcp_syncookies = 1
* Applying /usr/lib/sysctl.d/50-default.conf ...
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.promote_secondaries = 1
net.ipv4.conf.all.promote_secondaries = 1
net.ipv6.conf.default.use_tempaddr = 1
fs.inotify.max_user_watches = 65536
kernel.sysrq = 184
dev.cdrom.autoclose = 0
fs.protected_hardlinks = 1
fs.protected_symlinks = 1
kernel.kptr_restrict = 1
* Applying /usr/lib/sysctl.d/51-network.conf ...
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.default.accept_source_route = 0
net.ipv6.conf.all.accept_redirects = 0
net.ipv6.conf.default.accept_redirects = 0
* Applying /etc/sysctl.d/99-sysctl.conf ...
vm.swappiness = 1
vm.vfs_cache_pressure = 50
vm.dirty_background_bytes = 16777216
vm.dirty_bytes = 33554432
* Applying /etc/sysctl.conf ...