linux-kernel - Re: CD tray closes spontaneously after opening it

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Date:	Wed, 1 Oct 2008 08:48:19 +0100
From:	"Tom Spink" <tspink@...il.com>
To:	"Kay Sievers" <kay.sievers@...y.org>
Cc:	"Frans Pop" <elendil@...net.nl>, "Tony Vroon" <tony@...on.org>,
	linux-kernel@...r.kernel.org, "Tejun Heo" <tj@...nel.org>,
	"Jens Axboe" <jens.axboe@...cle.com>
Subject: Re: CD tray closes spontaneously after opening it

2008/9/30 Kay Sievers <kay.sievers@...y.org>:
> On Tue, Sep 30, 2008 at 9:50 PM, Frans Pop <elendil@...net.nl> wrote:
>> On Tuesday 30 September 2008, Kay Sievers wrote:
>>> Does:
>>>   /sbin/udevadm monitor --env
>>> print something while you see the tray closing?
>>
>> I was somewhat lucky to reproduce it with that running and there was no
>> output during the open or close. I guess that rules out udev?
>
> I think so, yes.
>
>> I still don't know how to reliably reproduce this. It seems that after it
>> has occurred once, it will not occur again unless the system is rebooted.
>> But I'm not 100% sure of that.
>>
>> Most times I've seen it was after playing a DVD when ejecting the disc to
>> put it back in its box, but not when the DVD was inserted earlier.
>> But I've also seen it shortly after the system is booted when just opening
>> the tray with no media inserted.
>>
>> Just to be clear: until recently the drive has always behaved perfectly in
>> the same situations.
>>
>>> Does this also happen when you set:
>>>   /proc/sys/dev/cdrom/autoclose
>>> to 0?
>>
>> I'll set that on boot using /etc/sysctl.conf and will report if I can
>> still reproduce with that setting. I've checked that the "normal" value
>> is 1.
>
> That will prevent the closing, when something tries to open the device
> in blocking mode. If that solves the issue, you should start looking
> which process tries to access your drive.
>
> Kay
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Hi Kay,

If you can manage to reproduce this, can you try/have you tried
different kernel versions?

-- 
Tom Spink
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