[Bug 1257352] [NEW] kvm hangs occasionally when switching out of the qemu console

James Hunt 1257352 at bugs.launchpad.net
Tue Dec 3 16:05:23 UTC 2013


Public bug reported:

To recreate (although this does *NOT* fail most of the time alas):

1) press "ctrl-alt-2" to switch to the qemu console.
2) type say "sendkey ctrl-alt-f1"
3) press "ctrl-alt-1".

Expected outcome: Switch to tty1 in the VM.

Actual outcome: No switch to tty1 in the VM. and qemu console
unresponsive to any keyboard input.


Rather a vague problem description I'm afraid but this has happened to me 3 times recently. No crash and no excessive CPU is observed.

I'll grab an strace when it happens again and attach...

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: qemu-system-x86 1.6.0+dfsg-2ubuntu4
ProcVersionSignature: Ubuntu 3.12.0-4.12-generic 3.12.1
Uname: Linux 3.12.0-4-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.12.7-0ubuntu1
Architecture: i386
CurrentDesktop: Unity
Date: Tue Dec  3 15:41:40 2013
InstallationDate: Installed on 2010-10-21 (1139 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
SourcePackage: qemu
UpgradeStatus: Upgraded to trusty on 2013-11-01 (31 days ago)

** Affects: qemu (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 trusty

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https://bugs.launchpad.net/bugs/1257352

Title:
  kvm hangs occasionally when switching out of the qemu console

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