linux-kernel - Re: strange behavior on multimedia eject button for cdrom

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Date:	Fri, 29 Feb 2008 12:47:09 +0000
From:	Mike Keehan <Mike@...han.net>
To:	Harald Dunkel <harald.dunkel@...nline.de>
CC:	linux-kernel@...r.kernel.org
Subject: Re: strange behavior on multimedia eject button for cdrom

Hi Harold.

Somewhere on the web I read that some of the M1330 media keys are 
directly connected to the drive, hence the lack of keycodes.

If you eject a disk while it is being played, then the Linux driver 
will get a read failure.  What happens then may not be well defined :)

Mike.


Harald Dunkel wrote:
> Hi folks,
> 
> My laptop (Dell XPS M1330) has some multimedia keys added to the
> keyboard, including an eject button for the cdrom drive, instead
> of a "regular" eject button built into the drive itself.
> 
> When I press it to eject a CD, then Linux becomes pretty mad: The
> audio device gets stuck somehow, playing the same tune over and
> over again, the network connection is frozen, etc. Once the CD is
> out it is back to normal, as it seems.
> 
> I would guess that the eject button triggers some bios functionality,
> outside of the control of the kernel. But is it? How comes that
> Linux seems to loose control in this case?
> 
> Kernel is 2.6.24.2 (amd64).
> 
> AFAICS this eject button has no keycode. The other multimedia keys
> have.
> 
> 
> Any helpful idea would be very welcome.
> 
> 
> Regards
> 
> Harri
> 
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