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SubjectRe: 2.6.19-rc3 system freezes when ripping with cdparanoia at ioctl(SG_IO)
ens Axboe wrote:
> On Mon, Oct 30 2006, Gregor Jasny wrote:
>
>> 2006/10/30, Jens Axboe <jens.axboe@oracle.com>:
>>
>>> Can you confirm that 2.6.18 works?
>>>
>> The reporter of [1] states that his SATA Thinkpad freezes with 2.6.17
>> and 2.6.18, too.
>>
>> Gregor
>>
>> [1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=391901
>>
>
> Ok, mainly just checking if this was a potential dupe of another bug.
>
>

Jens (or anybody else who has any idea of how to debug this),

Did you have a chance to reproduce the problem? I guess we "only" need a
machine with SATA/ata_piix and cdparanoia 3.10. If you want me to debug
some stuff, feel free to tell me what. But, since it freezes the machine
and sysrq doesn't even work, I don't really know what to try...

I just tried on rc5 and rc5-mm1, both have the problem (as 2.6.16, .17
and .18 do, don't know about earlier kernels). I didn't have a audio CD
here, so I tried abcde on a DVD on purpose. With cdparanoia 3.10-pre0
(from Debian testing), it reports nothing during about 5 seconds and
then the machine freezes. With cdparanoia 3a9.8-11 (from Debian stable),
it reports an error very quickly, and dmesg gets a couple line like these:
sg_write: data in/out 12/12 bytes for SCSI command 0x43--guessing
data in;
program cdparanoia not setting count and/or reply_len properly

Thanks,
Brice

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