On Wed, Oct 5, 2011 at 1:00 PM, <m.roth at 5-cent.us> wrote: > Negative wrote: > > On Wed, Oct 5, 2011 at 11:15 AM, <m.roth at 5-cent.us> wrote: > > Negative wrote: > > On Wed, Oct 5, 2011 at 11:15 AM, <m.roth at 5-cent.us> wrote: > >> Negative wrote: > <snip> > >> > I still wonder what is causing this. I couldn't find any mention of a > >> > similar problem, including on my desktop in my office, where I have a > >> > very similar setup, with four kvm guests, two Fedora, one Centos 6 and > >> > one Windows XP. > <snip> > Do I remember this is 5.7? Look at the announcement that *just* came out > in the last hour, with the libX11 bugfix. > <https://rhn.redhat.com/errata/RHBA-2011-1351.html> says "Previously, in > the 64-bit mode, libX11 computed addresses using the 32-bit arithmetic. As > a consequence, under heavy load, applications running in the X environment > terminated unexpectedly. A patch has been provided to address this issue, > and the crashes no longer occur in the described scenario." > > mark > > If this isn't my lucky day. RH and Centos solved my problem even before I defined it. I saw the update earlier and didn't dare hope. I updated and it seems to have solved the issue. On the host machine, I fired up virt-manager, started the Fedora guest and it's been up for a half hour. Now I, too, can start complaining about Gnome 3. I've read it's like Windows, but it's the spitting image of the Mac OS.