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

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Date:	Thu, 12 Jun 2008 02:13:18 +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 2:10 AM, Justin Mattock <justinmattock@...il.com> wrote:
> 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
>

Heres dmesg:
(forgot to attach)
-- 
Justin P. Mattock

Download attachment "dmesg3" of type "application/octet-stream" (66930 bytes)