Ubuntu LTS Server 12.04 hangs on startup - Solution


Active Member
Oct 19, 2010
Hello all,

I have just installed the latest version of Proxmox 3.

pveversion -v

pve-manager: 3.1-3 (running version: 3.1-3/dc0e9b0e)
pve-kernel-2.6.32-23-pve: 2.6.32-109
lvm2: 2.02.98-pve4
clvm: 2.02.98-pve4
corosync-pve: 1.4.5-1
openais-pve: 1.1.4-3
libqb0: 0.11.1-2
redhat-cluster-pve: 3.2.0-2
resource-agents-pve: 3.9.2-4
fence-agents-pve: 4.0.0-1
pve-cluster: 3.0-7
qemu-server: 3.1-1
pve-firmware: 1.0-23
libpve-common-perl: 3.0-6
libpve-access-control: 3.0-6
libpve-storage-perl: 3.0-10
pve-libspice-server1: 0.12.4-1
vncterm: 1.1-4
vzctl: 4.0-1pve3
vzprocps: 2.0.11-2
vzquota: 3.1-2
pve-qemu-kvm: 1.4-17
ksm-control-daemon: 1.1-1
glusterfs-client: 3.4.0-2

I created a KVM virtual machine with the following specs.

Screen Shot 2013-10-25 at 2.53.37 PM.png

As soon as I startup the Ubuntu 12.04 KVM it will hang at this.

Screen Shot 2013-10-25 at 2.40.26 PM.png

Then I changed the video driver from default to default standard vga I got this error. If I clicked out of it, it proceeds to apply the change desired.

Screen Shot 2013-10-25 at 2.41.08 PM.png

After changing the display settings I am able to start up Ubuntu 12.04 just fine. It seems to be working fine even allowing me to apply all of the updates available for Ubuntu 12.04. I have rebooted a few times and no more hang ups. But as soon as I set the display back to default it will hang during boot up with the same error.


Active Member
Sep 27, 2014
Vienna 19
I had a similar problem with a guest Ubuntu 12.04.5 LTS and Kernel 3.13.0-37-generic x86_64.
I convert the vm from vmWare Player format to raw and started it. During startup, the VNC connection stopped respondig, but the vm was booting properly (I could do a login via SSH).
The position during the boot sequence, when VNC did hang changed and sometimes it finished completely.
Although VNC seems to hang, I was able to send a Ctrl-Alt-Delete key to reboot the vm.

After changing the Display to "Standard VGA", all the problems are gone.
Thanks for the solution!



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