Hi Zoltan, Zoltan Frombach wrote:
> Generally kvm-qemu works. But my Debian guest OS's (Debian "squeeze" > with 2.6.32 or 3.2.x.x kernel) won't boot up if I assign more than 4 > vcpus to the guest. What happens is the kernel starts to load then > it freezes right where it should load the Linux agpgart module. It > just hangs there. [...] > If I change the VM's config to have just 4 vcpus then it boots up > most of the time. Sometimes it hangs with just 4 vcpus, too. When it > hangs, it always hangs at the same point, so it is consistent. [...] > I've tried to blacklist the agpgart module inside my guest OS to no > avail. Here is what I've added to the end of > /etc/modprobe.d/blacklist.conf : > blacklist agpgart > blacklist intel-agp > > However, when the VM happens to boot up then I still see a reference > to agpgart in dmesg (snippet): Yes, AGP support is built in (not a module). Luckily it's quite possible that something else is the problem that just happens to get initialized around the same time as AGP. What happens if you boot in recovery mode (kernel commandline argument "single")? [...] > PS: At least one other person is experiencing the exact same > problem. He has pinned it down to the Debian kernel which runs as > the guest. Please see his post about it: > http://lists.centos.org/pipermail/centos-virt/2012-October/003084.html Thanks for a clear report. Could you try 3.5.5 or newer from experimental and let us know how it goes? If it's affected, we'll be better prepared to get help from upstream, and if it isn't, we can try to find which patch fixed it and apply the same to squeeze, so either result is a win. Hope that helps, Jonathan -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
