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Date: Fri, 17 May 2013 14:02:04 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH] scsi: reset cdrom tray statuses on
	scsi_disk_reset
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To: Pavel Hrdina <phrdina@redhat.com>
Cc: kwolf@redhat.com, qemu-devel@nongnu.org

Il 17/05/2013 13:57, Pavel Hrdina ha scritto:
>>
>> What happens when you suspend the QEMU machine to RAM?  I believe the
>> tray should remain open or, if closed, should remain locked.  Can you
>> try the same test on bare-metal (hint: boot to emergency mode to bypass
>> anything that udev can do with locking the tray, then use sg_prevent to
>> toggle the state).
> 
> I've booted to init 1, then ejected the CD-ROM tray and run the
> pm-suspend. The computer has suspended successfully. And again
> immediately after the computer is turned on before the screen is turned
> on the CD-ROM tray is closed.

Ok, these are good signs. :)

> I don't have SCSI CD-ROM device to use the sg_prevent.

All CD-ROMs ultimately speak SCSI (via ATAPI).  You don't have /dev/sr0?

Paolo