[PATCH 0/1] LP#397734 -- disable cdrom tray lock

Tim Gardner tim.gardner at canonical.com
Thu Mar 11 15:30:23 UTC 2010

On 03/11/2010 08:01 AM, Andy Whitcroft wrote:
> There has been much discussion on what the correct behaviour is when
> hitting the CDROM eject button.  Although this button is intended to only
> allow eject when the media is not busy, the common use cases effectivly
> render this button inoperative as the media is always busy.  Userspace has
> been modified to turn off the lock for mounted filesystems based on the
> assumption that read-only filesystems cannot be dammaged by loss, cirtinly
> less so that the effects of ripping out a live USB based filesystem.
> The above modification cannot help with media players which directly
> open /dev/sr0 and access the raw stream.  This means that behavour is
> now inconsistant depending on what you use the disk for.  For filesystem
> mounts eject will pop the drive, for music etc it will not.
> We have been requested to default tray locking off to ensure that the
> locking is off consistantly, and that we get a consistant behaviour.
> This means that the disk _will_ eject on command, in use or not.
> Userspace will be modified to track the loss of the media and unmount it
> automatically.  Media players will presumably error and stop.  Work will
> also be done to fix disk burning software to ensure they explicitly lock
> the tray to prevent loss of data.
> For Lucid.
> -apw
> Andy Whitcroft (1):
>    UBUNTU: SAUCE: cdrom -- default to not locking the tray when in use
>   drivers/cdrom/cdrom.c |    2 +-
>   1 files changed, 1 insertions(+), 1 deletions(-)

It seems quite reasonable to have your media ejected upon a physical key 
press. There is nothing more infuriating then not being able to eject a 
CDROM unless you reboot your machine because some stupidly coded 
application won't let go.

Acked-by: Tim Gardner <tim.gardner at canonical.com>

Tim Gardner tim.gardner at canonical.com

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