linux-kernel - Re: macbook pro dvd playback after suspend Buffer I/O error

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Date:	Thu, 12 Jun 2008 02:10:10 +0000
From:	"Justin Mattock" <justinmattock@...il.com>
To:	"Tejun Heo" <htejun@...il.com>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: macbook pro dvd playback after suspend Buffer I/O error

On Thu, Jun 12, 2008 at 1:18 AM, Tejun Heo <htejun@...il.com> wrote:
> Justin Mattock wrote:
>> O.K. attached is dmesg of playing a dvd, then suspending and wakingup,
>> as well as starting after the buffer error.(audit messages)
>> This is interesting, even  pausing the dvd before suspending, causes
>> the same error.
>> I sent a post to mplayer-users to see if there is a way to have
>> mplayer pause and wait for the disk drive to align, but am still
>> waiting
>> for a response.
>
> Can you please do the followings?
>
> 1. dd if=/dev/sr0 of=/dev/null bs=1M
> 2. suspend / resume
> 3. see whether dd fails and post the resulting dmesg.
>
> Thanks.
>
> --
> tejun
>

Hello; I did what you had suggested(twice below is the first,same
results with second)
 upon wakeup dd just quits giving me this:

dd: reading `/dev/sr0': Input/output error
3+1 records in
3+1 records out
3276800 bytes (3.3 MB) copied, 21.834 seconds, 150 kB/s

And under dmesg:
[  329.596421] end_request: I/O error, dev sr0, sector 6400
[  329.596437] Buffer I/O error on device sr0, logical block 800
[  329.596903] Buffer I/O error on device sr0, logical block 833
[  329.596912] Buffer I/O error on device sr0, logical block 834
[  329.596919] Buffer I/O error on device sr0, logical block 835
[  329.596926] Buffer I/O error on device sr0, logical block 836
[  329.596934] Buffer I/O error on device sr0, logical block 837
[  329.596941] Buffer I/O error on device sr0, logical block 838
[  329.596949] Buffer I/O error on device sr0, logical block 839
[  329.596956] Buffer I/O error on device sr0, logical block 840
[  329.596963] Buffer I/O error on device sr0, logical block 841

regards;


-- 
Justin P. Mattock
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