Re: [Qemu-devel] [PATCH] scsi: reset cdrom tray statuses on scsi_disk_reset

[Pavel Hrdina]

On 16.5.2013 18:11, Paolo Bonzini wrote:
> Il 16/05/2013 17:48, Pavel Hrdina ha scritto:
> >  From what I just tested it is the OS-independent HW behavior.
> >
> > Tested on desktop:
> > 1. Turn off the computer.
> > 2. Turn on the computer and after few second open the CD-ROM tray before
> > any OS system is loaded and holding the power button turn the computer
> > off again. The CD-ROM tray should stay opened.
> > 3. Turn on the computer and the CD-ROM tray is automatically closed.
>
> When?  Compared to the BIOS splash screen, for example.

Immediately after the computer is turned on. On HP Z400 workstation it 
means before the monitor is turned on.

> > Next time I'll mention this test in the commit message.
>
> It could mean it is done in the firmware.
>
> 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).
>
> Paolo

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.

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

Pavel