Comment 64 for bug 1157643

Latest upgrade attempt for 12.04 (no work-arounds) was not successful. Additional info:

cat /etc/sysctl.d/*.conf /etc/sysctl.conf | sudo sysctl -p -

kernel.printk = 4 4 1 7
net.ipv6.conf.all.use_tempaddr = 2
net.ipv6.conf.default.use_tempaddr = 2
kernel.kptr_restrict = 1
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.all.rp_filter = 1
net.ipv4.tcp_syncookies = 1
kernel.yama.ptrace_scope = 1
vm.mmap_min_addr = 65536
fs.inotify.max_user_watches = 524288
error: "Invalid argument" setting key "fs.inotify.max_user_watches"

grep fs.inotify.max_user_watches /etc/sysctl.d/*.conf

/etc/sysctl.d/30-nepomuk-inotify-limit.conf:fs.inotify.max_user_watches = 524288
/etc/sysctl.d/30-spideroak.conf:fs.inotify.max_user_watches = 65536

Now, the curious item here is the nepomuk entry. I may have launched it once just to look at it, but I do not actively use this application.