Re: Problem with V630i phone (0x0fce:0xe043)

On Sun, 27 May 2007, Vincent Bernat wrote:

> Hi !
> 
> READ CAPACITY  command seems to return  fuzzy value when I  plug my Sony
> Ericsson V630i  (rebranded K610i  by Vodaphone). Here  is an  excerpt of
> dmesg :
> 
> May 27 13:18:57 neo kernel: [236303.330175] SCSI device sdb: 466907 512-byte hdwr sectors (239 MB)

> Here is the output of fdisk -l -u
> 
>                    
> Disk /dev/sdb: 239 MB, 239056384 bytes
> 16 heads, 32 sectors/track, 911 cylinders, total 466907 sectors
> Units = sectors of 1 * 512 = 512 bytes
> 
>    Device Boot      Start         End      Blocks   Id  System
> /dev/sdb1   *          37      466943      233453+   6  FAT16
> 
> I have  noticed that 466907  + 37 =  466944 which should be  the correct
> value. Therefore, I have added a flag US_FL_REPORT_P1_CAPACITY that just
> adds 37 to capacity in sd.c. Well, that does not work either and I don't
> know why. dmesg says :
> 
> May 27 17:55:20 neo kernel: [   96.382982] SCSI device sdb: 466944 512-byte hdwr sectors (239 MB)

> May 27 17:55:20 neo kernel: [   96.505954] end_request: I/O error, dev sdb, sector 466941
> May 27 17:55:20 neo kernel: [   96.512064] Buffer I/O error on device sdb1, logical block 466904
> May 27 17:55:20 neo kernel: [   96.524950] end_request: I/O error, dev sdb, sector 466942
> 
> And after that, I think that my phone is not able to cope any request.

> To check that the size reported  by READ CAPACITY is the first partition
> size, I have started with a clean 2.6.21 kernel. I have plugged my phone
> and here is the partition I have created :
> 
> Disk /dev/sdb: 239 MB, 239056384 bytes
> 16 heads, 32 sectors/track, 911 cylinders, total 466907 sectors
> Units = sectors of 1 * 512 = 512 bytes
> 
>    Device Boot      Start         End      Blocks   Id  System
> /dev/sdb1              32      465919      232944   83  Linux
> 
> Now, I unplug and replug the phone. And here is what I get :
> 
> May 27 18:19:05 neo kernel: [ 1109.211680] SCSI device sdb: 465888 512-byte hdwr sectors (239 MB)

> Disk /dev/sdb: 238 MB, 238534656 bytes
> 16 heads, 32 sectors/track, 909 cylinders, total 465888 sectors
> Units = sectors of 1 * 512 = 512 bytes
> 
>    Device Boot      Start         End      Blocks   Id  System
> /dev/sdb1              32      465919      232944   83  Linux
> 
> So  it seems that  the phone  really returns  the 465919  - 32  for READ
> CAPACITY. Therefore, I don't understand why my change does not work. Any
> idea  ?

It looks like the phone's firmware is broken.  Does it work with other 
non-Linux computer systems?  Can you get a firmware update from the 
manufacturer?

>  How could  I debug  this ?

You already have.

>  Maybe the  phone builds  an erronous
> partition table ?

No, it didn't modify the partition table you created.  But it does seem 
to change its READ CAPACITY result based on the information in the 
partition table.

Alan Stern


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