Missing /dev/sr0 Arch 3.7.9-2

alexpitzen · 2013-02-24 23:46:01

I'm trying to simply mount a cd to look at its contents, but there's no /dev/sr0 or anything...
Lenovo ThinkPad W530. DVD drive works outside of Arch (Windoze & Mint).

$ ls /dev/{c,dv}d*
ls: cannot access /dev/cd*: No such file or directory
ls: cannot access /dev/dvd*: No such file or directory

$ ls /dev/sr*
ls: cannot access /dev/sr*: No such file or directory

$ uname -r
3.7.9-1-ARCH

$ dmesg | grep sr
[    1.706418] sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
[    1.707029] sr 1:0:0:0: Attached scsi CD-ROM sr0
[   15.393179] sr 1:0:0:0: CDB: 
[   26.352601] sr0: CDROM (ioctl) error, command: cdb[0]=0x51 51 00 00 00 00 00 00 00 02 00
[   26.352616] sr: Sense Key : 0xb [current] [descriptor]
[   26.352621] sr: ASC=0x0 ASCQ=0x0

$ lsmod | grep sr
sr_mod                 14824  0 
cdrom                  35521  1 sr_mod
scsi_mod              130423  3 libata,sd_mod,sr_mod

$ dmesg | grep ATAPI
[    1.688557] ata2.00: ATAPI: HL-DT-ST DVDRAM GT50N, LT20, max UDMA/33

$ wodim -checkdrive 
Device was not specified. Trying to find an appropriate drive...
wodim: No such file or directory. 
Cannot open SCSI driver!
For possible targets try 'wodim --devices' or 'wodim -scanbus'.
For possible transport specifiers try 'wodim dev=help'.
For IDE/ATAPI devices configuration, see the file README.ATAPI.setup from
the wodim documentation.

Last edited by alexpitzen (2013-02-27 20:06:26)

ewaller · 2013-02-25 00:41:48

As a sanity check, please post the output of pacman -Qi linux

alexpitzen · 2013-02-25 19:24:21

$ pacman -Qi linux
Name           : linux
Version        : 3.7.9-1
URL            : http://www.kernel.org/
Licenses       : GPL2
Groups         : base
Provides       : kernel26=3.7.9
Depends On     : coreutils  linux-firmware  kmod  mkinitcpio>=0.7
Optional Deps  : crda: to set the correct wireless channels of your country
Required By    : tp_smapi
Conflicts With : kernel26
Replaces       : kernel26
Installed Size : 61224.00 KiB
Packager       : Evangelos Foutras <evangelos@foutrelis.com>
Architecture   : x86_64
Build Date     : Sun 17 Feb 2013 06:15:58 PM CST
Install Date   : Sun 24 Feb 2013 10:44:06 AM CST
Install Reason : Explicitly installed
Install Script : Yes
Description    : The linux kernel and modules

ewaller · 2013-02-25 19:55:31

You're sane I wanted to ensure that the kernel you are running is the same as the kernel modules you have installed.

alexpitzen · 2013-02-25 20:36:34

ewaller wrote:

You're sane

I'm glad ^_^

EDIT: So, any ideas? Should I try posting in a different place like Laptop Issues or Kernel & Hardware?
I read somewhere (a thread from 2011 or so) that a kernel or udev update can cause this problem. Should I try downgrading?

EDIT2: I'm on 3.7.9-2 now (with same version linux-headers and linux-api-headers 3.7.4-1)
I also tried a downgrade to kernel linux-3.7.4-1, which didn't help

$ pacman -Qi linux
Name           : linux
Version        : 3.7.9-2
URL            : http://www.kernel.org/
Licenses       : GPL2
Groups         : base
Provides       : kernel26=3.7.9
Depends On     : coreutils  linux-firmware  kmod  mkinitcpio>=0.7
Optional Deps  : crda: to set the correct wireless channels of your country
Required By    : tp_smapi
Conflicts With : kernel26
Replaces       : kernel26
Installed Size : 63792.00 KiB
Packager       : Tobias Powalowski <tpowa@archlinux.org>
Architecture   : x86_64
Build Date     : Mon 25 Feb 2013 05:12:35 AM CST
Install Date   : Mon 25 Feb 2013 11:48:56 AM CST
Install Reason : Explicitly installed
Install Script : Yes
Description    : The linux kernel and modules

Last edited by alexpitzen (2013-02-25 23:58:21)

655321 · 2013-02-27 18:24:34

exact same problem, also If I do:

cat /proc/sys/dev/cdrom/info

I get this:

CD-ROM information, Id: cdrom.c 3.20 2003/12/17
drive name:
drive speed:
drive # of slots:
Can close tray:
Can open tray:
Can lock tray:
Can change speed:
Can select disk:
Can read multisession:
Can read MCN:
Reports media changed:
Can play audio:
Can write CD-R:
Can write CD-RW:
Can read DVD:
Can write DVD-R:
Can write DVD-RAM:
Can read MRW:
Can write MRW:
Can write RAM:

However it seems the drive does get detected but an error shows up on dmesg:

dmesg | grep CD
[    0.000000] ACPI: ECDT 00000000dafe4000 00052 (v01 LENOVO TP-8C    00001360 PTL  00000002)
[    1.790863] scsi 1:0:0:0: CD-ROM            MATSHITA DVD-RAM UJ8A2    SB01 PQ: 0 ANSI: 5
[    2.125052] cdrom: Uniform CD-ROM driver Revision: 3.20
[    2.125504] sr 1:0:0:0: Attached scsi CD-ROM sr0
[   21.448108] sr 1:0:0:0: CDB: 
[   32.404460] sr0: CDROM (ioctl) error, command: cdb[0]=0x51 51 00 00 00 00 00 00 00 02 00

hope that helps debug the problem!

EDIT: forgot to mention the drive works outisde of Arch (Backtrack Linux), I can burn cd/dvd without a problem and read without problems also.

Last edited by 655321 (2013-02-27 18:25:50)

alexpitzen · 2013-02-27 20:05:56

655321 wrote:

exact same problem, also If I do:
cat /proc/sys/dev/cdrom/info
I get this:
CD-ROM information, Id: cdrom.c 3.20 2003/12/17
drive name:
drive speed:
drive # of slots:
Can close tray:
Can open tray:
Can lock tray:
Can change speed:
Can select disk:
Can read multisession:
Can read MCN:
Reports media changed:
Can play audio:
Can write CD-R:
Can write CD-RW:
Can read DVD:
Can write DVD-R:
Can write DVD-RAM:
Can read MRW:
Can write MRW:
Can write RAM:

Exactly the same for me.

655321 wrote:

However it seems the drive does get detected but an error shows up on dmesg:

dmesg | grep CD
[    0.000000] ACPI: ECDT 00000000dafe4000 00052 (v01 LENOVO TP-8C    00001360 PTL  00000002)
[    1.790863] scsi 1:0:0:0: CD-ROM            MATSHITA DVD-RAM UJ8A2    SB01 PQ: 0 ANSI: 5
[    2.125052] cdrom: Uniform CD-ROM driver Revision: 3.20
[    2.125504] sr 1:0:0:0: Attached scsi CD-ROM sr0
[   21.448108] sr 1:0:0:0: CDB: 
[   32.404460] sr0: CDROM (ioctl) error, command: cdb[0]=0x51 51 00 00 00 00 00 00 00 02 00

Also the same:

$ dmesg | grep CD
[    0.000000] ACPI: ECDT 00000000dafe1000 00052 (v01 LENOVO TP-G5    00002510 PTL  00000002)
[    1.709484] scsi 1:0:0:0: CD-ROM            HL-DT-ST DVDRAM GT50N     LT20 PQ: 0 ANSI: 5
[    1.720325] cdrom: Uniform CD-ROM driver Revision: 3.20
[    1.720607] sr 1:0:0:0: Attached scsi CD-ROM sr0
[   14.408477] sr 1:0:0:0: CDB: 
[   25.361282] sr0: CDROM (ioctl) error, command: cdb[0]=0x51 51 00 00 00 00 00 00 00 02 00

It's interesting that yours is also a Lenovo (thinkpad T420?)

655321 · 2013-02-27 23:17:50

Mine is a Thinkpad T420s, this has been happening for a long time (months) and I have absolutely no idea on how to troubleshoot something like this....

Last edited by 655321 (2013-02-27 23:18:53)

Arch Linux

#1 2013-02-24 23:46:01

Missing /dev/sr0 Arch 3.7.9-2

#2 2013-02-25 00:41:48

Re: Missing /dev/sr0 Arch 3.7.9-2

#3 2013-02-25 19:24:21

Re: Missing /dev/sr0 Arch 3.7.9-2

#4 2013-02-25 19:55:31

Re: Missing /dev/sr0 Arch 3.7.9-2

#5 2013-02-25 20:36:34

Re: Missing /dev/sr0 Arch 3.7.9-2

#6 2013-02-27 18:24:34

Re: Missing /dev/sr0 Arch 3.7.9-2

#7 2013-02-27 20:05:56

Re: Missing /dev/sr0 Arch 3.7.9-2

#8 2013-02-27 23:17:50

Re: Missing /dev/sr0 Arch 3.7.9-2

Board footer