It looks like the bug still exists in 'trusty', qemu-kvm 2.0, however, it's not clear why.
Aftre installation /dev/kvm have wrong permissions: --- crw------- 1 root root 10, 232 Jan 20 02:09 /dev/kvm --- Reinstalling qemu-system-common fixes the problem. I did a simple research, and here is what I've found: * The code to fix acl still exists, but was moved to qemu-system-common package. * There is no /lib/udev/rules.d/70-udev-acl.rules, it looks like ACLs for /dev/kvm are set by /lib/udev/rules.d/70-uaccess.rules, there is a string: --- SUBSYSTEM=="misc", KERNEL=="kvm", TAG+="uaccess" --- * A builtin function 'builtin_uaccess' [1] is called to set permissions according to the following string from /lib/udev/rules.d/73-seat-late.rules: --- TAG=="uaccess", ENV{MAJOR}!="", RUN{builtin}+="uaccess" --- [1] https://github.com/systemd/systemd/blob/master/src/udev/udev-builtin-uaccess.c -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1057024 Title: kvm kernel module always loaded, without setting /dev/kvm permissions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/1057024/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs