When support was added for the kvm hidden='on' attribute in commit d07116, the version requirement was listed as "2.1.0 (QEMU only)". However, this was added when libvirt was at version 1.2.8 - it is *QEMU* that must be at version 2.1.0 or later. This went unnoticed for a very long time (over 2 years). Then a week or two ago a new Windows convert in the #virt channel on OFTC was told he needed to use this feature (to prevent nvidia drivers in a guest from refusing to work due to being run in a virtual machine). There was some problem with it being recognized and "someone" (it may have been me, or may have been someone else, I don't remember) pointed out that the documentation at http://www.libvirt.org/formatdomain.html says that it requires libvirt 2.1.0. The next several days were filled with agony as a new convert to Linux first tried to upgrade a Linux Mint host running their "LTS" version to something newer, then tried to install a libvirt build built for Ubuntu onto this, and later back to the old LTS Linux Mint. After this he tried building his own libvirt from source (with all the expected problems), and finally switched to Fedora. In the end it was hours and hours of everybody's lives that they will never get back. To now learn that he didn't need to do this (his original libvirt version was 1.3.3, so whatever his problem was, it was elsewhere) makes the pain all that much worse. To prevent this from happening again, this simple patch changes the version requirement for the kvm hidden attribute from "2.1.0 (QEMU only)" to "1.2.8 (QEMU 2.1.0)". --- docs/formatdomain.html.in | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 7008005..513bc0e 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -1703,7 +1703,7 @@ <td>hidden</td> <td>Hide the KVM hypervisor from standard MSR based discovery</td> <td>on, off</td> - <td><span class="since">2.1.0 (QEMU only)</span></td> + <td><span class="since">1.2.8 (QEMU 2.1.0)</span></td> </tr> </table> </dd> -- 2.7.4