Comments on: Using Linux KVM Virtualization on Ubuntu Gutsy Gibbon 7.10

By: nazri abdullah

nazri abdullah — Thu, 10 Sep 2009 04:51:59 +0000

Hi.

I’m running the kvm with option -serial
Is there any example of serial parameter

As i know ubuntu does not support /dev/tcp/localhost/port#

Any idea?

thanks

By: Mike

Mike — Mon, 27 Apr 2009 21:46:40 +0000

Hey, great tutorial. I’m currently doing research on degredation caused by virtualization on Intel’s Atom architecture for my senior project and I’m having some serious problems with KVM. My goal was to have Ubuntu Gutsy desktop as the host, as well as the guest on both VMWare and KVM. It works fine on the host and VMWare but it has some wierd issues on KVM. I tried to work around the real mode issue but ended up just taking the 12 hours to install it in QEMU and making sure I back up the image right after it was done installing, just in case hehe. I have QEMU 0.10.2 installed but KVM uses its own QEMU which is still at 0.9.0 for the version of KVM I have(either 22, I think if it came w/ the distro, or 87, not really sure if its actually loading 87). I can get in most of the time but I see ata1.00 or ata2.00 errors and it tries to soft reset the hard drives. I disabled the CD(since it was having problems w/ the image for some reason) by using 3 other tiny HD images. My problem is I can’t get into Gnome. I can generally get to the terminal. I’ll try to post more details when I have sometime to look through the logs. Any ideas anyone?

By: md

md — Tue, 24 Feb 2009 15:52:07 +0000

Thanks for the update Nico!

By: Nico Kadel-Garcia

Nico Kadel-Garcia — Tue, 24 Feb 2009 15:48:25 +0000

Intrepid now provides the ‘virt-manager’ tool, written by RedHat for use with Xen and other virtual managers. This has also been backported to Gutsy, so a simple ‘apt-get install virt-manager’ should provide your readers with a very handy manager for virtual environments.

By: Dave

Dave — Sat, 27 Dec 2008 20:14:15 +0000

see here for framebuffer solution.

“this error is usually to do with not being allowed to run x-stuff as root, you could

sudo chmod a+rwx /dev/kvm, or whatever it is.

then run it as your non root user.”

Dave

By: Mike

Mike — Fri, 26 Dec 2008 22:15:25 +0000

Intel(R) Pentium(R) Dual CPU T2330 @ 1.60GHz
Indicates a dual Pentium core, not “Core 2″ processor.

A “Core 2″ looks like:
Intel(R) Core(TM)2 Quad CPU Q9300 @ 2.50GHz

No sign of “Pentium” anywhere in the name. ;)

By: Jasbir

Jasbir — Fri, 26 Dec 2008 04:45:36 +0000

Please check if the BIOS has a menu for enabling /disabling virtualization

By: md

md — Mon, 15 Dec 2008 16:58:08 +0000

Interesting… I didn’t know Intel had dual core chips without VT… I don’t know what else to say, but it doesn’t look like your processor supports it.

By: Sanjeev

Sanjeev — Sun, 14 Dec 2008 04:43:06 +0000

Thank you for the update. No, it just returned blank.

Here are the flags:
fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl est tm2 ssse3 cx16 xtpr lahf_lm

and this is the model:
Intel(R) Pentium(R) Dual CPU T2330 @ 1.60GHz

By: md

md — Fri, 12 Dec 2008 05:59:46 +0000

A dual core Intel should have the VT extensions… are you sure it doesn’t?? What do you get when you run this?

egrep ‘(vmx|svm)’ /proc/cpuinfo

By: Sanjeev

Sanjeev — Fri, 12 Dec 2008 05:15:26 +0000

Hello,

Such a great tutorial. Thanks a lot!!
Though I have dual core intel, but it doesn’t have support for VT-x. Does that make kvm obsolete for such machines. Will there be any difference with kvm vs qemu in such a case. Kindly take time to enlighten ;)

By: g’nōō-bûr » Blog Archive » Ubuntu + Compiz Rules, Vista + Aero Drools.

Mon, 07 Jul 2008 18:16:04 +0000

[...] of Google and Ubuntu forums, I got my dual-screens working, World of Warcraft working (on Wine), virtual machines running XP and others (for my virtual LAN–multiple VMs is why I wanted so much RAM in the [...]

By: Does VMWare Workstation 6 crash when you power on? | Rob's Blog

Does VMWare Workstation 6 crash when you power on? | Rob's Blog — Tue, 22 Apr 2008 00:42:39 +0000

[...] I’ve added learning about KVM to my homework list. This link is a [...]

By: Mark Harrison

Mark Harrison — Sun, 20 Apr 2008 07:01:53 +0000

Francois,

Thank you for that last comment (about using qemu rather than kvm during the installation only.)

The same seems to work to install some versions of Ubuntu as guests on other versions of Ubuntu.

Currently installing 6.10-server as a guest on 7.04-desktop.

By: Francois Rigaut

Francois Rigaut — Sat, 23 Feb 2008 20:21:28 +0000

Installing mandriva with kvm on hardy:

Just a tip. In some distro, kvm comes with the -no-kvm flag disabled (e.g. in hardy heron). You sometimes need this flag to install distros, to work around some graphical bootloader issues. For instance, the mandriva liveCD will not boot into kvm without this flag.

A work around is to install Mandriva with qemu (just replace kvm by qemu in the article’s instructions). It’ll be slow, but at least it works. Remember to choose a text bootloader at the end of the installation.

Once installed, you can start you virtual mandriva normally with kvm (as mentioned in this article), and you’ll get hardware acceleration.

By: ivo

ivo — Fri, 15 Feb 2008 20:41:45 +0000

Sorry, never mind, I found the “eject cdrom” info for qemu (with “-monitor stdio” option), I’m guessing that will work. Will try later today.

The links I found are:
http://www.free-bees.co.uk/articles/gettingstartedqemu/
and
http://calamari.reverse-dns.net:980/cgi-bin/moin.cgi/FrequentlyAskedQuestions

By: ivo

ivo — Fri, 15 Feb 2008 20:12:32 +0000

This is an old post, I hope you are (or somebody else is) still responding to questions. I managed to install WinXP without any problem on Ubuntu host. The problem I have is the CDROM. It works if you start the virtual machine with the CDROM already mounted, but if you try to try to insert any CD afterwards, it cannot read it, windows comes up with some error message.

For example, on situation where this is a problem is if you try to install a piece of s/w that comes on several CDs. The first CD works fine, but you cannot read other CDs.

By: sque

sque — Mon, 04 Feb 2008 05:17:23 +0000

Permission things!

After loading kvm and kvm-intel/kvm-amd it will create the device /dev/kvm (if everything went ok)

This device is accessible by root or group kvm, so add your user to kvm groop by running:
”sudo adduser $LOGNAME kvm” as previous mentioned!

If you are still getting permission denied, you probably forgot to relogin! If you want to avoid relogin run “su $LOGNAME” to create a new shell instance with new user permitions.

By: md

md — Wed, 16 Jan 2008 02:53:34 +0000

Robert, very interesting, thank you for the explanation. I was using an AMD processor that apparently does not have this issue (and hence I was stumped trying to recreate it).

By: Robert Munn

Robert Munn — Tue, 15 Jan 2008 07:39:35 +0000

OK, out of curiosity I tried to replicate EB’s problem and was able to replicate it. The issue I found is noted as a real mode issue with Intel CPUs.

http://kvm.qumranet.com/kvmwiki/Intel_Real_Mode_Emulation_Problems

I was able to run an install using the netboot mini.iso, but it had issues with the mirror I chose.

I started a CentOS 5.1 install but it bombed trying to do the graphic install. I re-started with a text-based install of CentOS from CD. It ran fine and my CentOS VM is now running.