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Description of problem:
Start guest with snapshot=on mode, find previous internal snapshot disappear when check using "(qemu) info snapshot".

Version-Release number of selected component (if applicable):
qemu-kvm-0.12.1.2-2.144.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1.start guest, and save internal snapshot
(qemu) savevm test
(qemu) info snapshots 
Snapshot devices: drive-ide0-0-0
Snapshot list (from drive-ide0-0-0):
ID        TAG                 VM SIZE                DATE       VM CLOCK
1         test                    10M 2011-02-11 10:49:36   00:00:08.719

2.shutdown guest, and start with snapshot=on mode
-drive file=/dev/vgtest/lvtest,if=none,id=drive-ide0-0-0,format=qcow2,cache=none,snapshot=on

3. check snapshot again
(qemu) info snapshots 
Snapshot devices: drive-ide0-0-0
Snapshot list (from drive-ide0-0-0):
ID        TAG                 VM SIZE                DATE       VM CLOCK

  
Actual results:
snapshot disappear.

Expected results:
snapshot should be available.

Additional info:

Is this reproducible with -145?

(In reply to comment #2)
> Is this reproducible with -145?
Can be reproduce this issue with qemu-kvm-0.12.1.2-2.145.el6.x86_64.

I wonder why I asked for reproduction back in February... This can't work because snapshot=on creates a new qcow2 file with the image as a backing file, and neither can you load an internal snapshot from a backing file nor is it easy to implement. This would be a major RFE and we don't support internal snapshots. Closing.