I had the exact same issue with a VM after upgrading the host from 12.04 to 14.04.
Thank you Todd for the workaround. It would have been more work than I cared for to reassemble that machine (even if it was just a test machine). I'm not sure what the status of this bug is? Is this something that is already fixed but was an exisiting issue from a previous version? I've attached the qemu-img I compiled. It may help someone else recover a bit quicker - getting everything in place to compile the binary wasted a good couple of hours as I had to modify several dependancies, install additional packages, etc. But of course, the safer method is to build yourself. FWIW I had to install: sudo apt-get install autoconf automake autopoint autotools-dev dh-autoreconf libltdl-dev libtool m4 libglib2.0-0-dbg libglib2.0-bin libglib2.0-dev libpcre3-dev libpcrecpp0 ( I think I could have just done autoconf rather than dh-autoreconf) After the installation of libglib2.0-0-dbg remember to re-run ./configure If you compile yourself you can kill the make process after the build of the qemu-img binary. ** Attachment added: "qemu-img version 1.7.2 compiled on Ubuntu Trusty Thar (Ubuntu 14.04.1 LTS)" https://bugs.launchpad.net/qemu/+bug/1354167/+attachment/4229538/+files/qemu-img -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1354167 Title: On VM restart: Could not open 'poppy.qcow2': Could not read snapshots: File too large Status in QEMU: New Bug description: I'm unable to restart a VM. virt-manager is giving me: Error starting domain: internal error: process exited while connecting to monitor: qemu-system-x86_64: -drive file=/var/lib/libvirt/images/poppy.qcow2,if=none,id=drive-virtio- disk0,format=qcow2: could not open disk image /var/lib/libvirt/images/poppy.qcow2: Could not read snapshots: File too large From the command line trying to check the image also gives me: qemu-img check poppy.qcow2 qemu-img: Could not open 'poppy.qcow2': Could not read snapshots: File too large This bug appears with both the default install of qemu for ubuntu 14.04: qemu-img version 2.0.0, Copyright (c) 2004-2008 Fabrice Bellard And the latest version. qemu-img version 2.1.50, Copyright (c) 2004-2008 Fabrice Bellard Host: Dual E5-2650 v2 @ 2.60GHz 32GB Memory 4TB Disk space (2.1TB Free) Host OS: Ubuntu 14.04.1 LTS 64bit Guest: Ubuntu 14.04 64bit Storage Size: 500gb To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1354167/+subscriptions
