Comment # 1 on bug 982230 from Atri Bhattacharya

Actually, it just fails to save the machine state correctly at all. Trying to
pause the vm in a boxes session also gives:

~> journalctl -b -f
May 30 15:54:27 mal libvirtd[20082]: iohelper reports: 
May 30 15:54:27 mal virtlogd[20753]: Cannot open log file:
'/home/atri/.cache/libvirt/qemu/log/boxes-unknown-3.log': Device or resource
busy
May 30 15:54:27 mal libvirtd[20082]: Cannot open log file:
'/home/atri/.cache/libvirt/qemu/log/boxes-unknown-3.log': Device or resource
busy
May 30 15:54:27 mal virtlogd[20753]: End of file while reading data:
Input/output error
May 30 15:54:36 mal libvirtd[20082]: operation failed: job: unexpectedly failed
May 30 15:54:36 mal virtlogd[20753]: End of file while reading data:
Input/output error

Editing summary accordingly