topic Re: imx6 sata cdrom driver issue in i.MX Processors

imx6 sata cdrom driver issue

Jon_Bagg — Wed, 22 Apr 2015 16:15:55 GMT

Mounting a SATA CDROM fails aprox 1/20 times with this error....

root@freescale /tmp$ mount /dev/sr0 test/

UDF-fs: No partition found (1)

mount: mounting /dev/sr0 on test/ failed: Invalid argument

I'm using a Sabre imx6q board, freescale kernel 3.0.35 built with imx6_defconfig and the following extra configs

CONFIG_BLK_DEV_SR=y

CONFIG_UDF_FS=y

CONFIG_UDF_NLS=y

CONFIG_ISO9660_FS=y

I've tried several disks and dvd drivers. They all experience this issue on the Sabra board. The same disks mount 100% of the time in an x86 machine.

I first noticed the issue on our own imx6d boards running mainline kernel 3.19. Once in a while the kernel would dump out a backtrace (attached) when mounting.

Original Attachment has been moved to: mount_cdrom_backtrace.txt.zip

Re: imx6 sata cdrom driver issue

fabio_estevam — Wed, 22 Apr 2015 16:23:50 GMT

Hi Jonathan,

I looked at your 3.19 logs and I would suggest you to report it to linux-ide@vger.kernel.org and linux-arm-kernel@lists.infradead.org.

Regards,

Fabio Estevam

Re: Re: imx6 sata cdrom driver issue

JohnBirch — Thu, 23 Apr 2015 15:05:41 GMT

Thanks Fabio.

Customer tried 3.19 on x86 to the same optical drive & disc and filesystem mounting is *not* intermittent on that setup. They will report this to the kernel folks.

They are also going optical drive mounting with the same commands on i.MX53 and see what happens there.

Re: Re: imx6 sata cdrom driver issue

fabio_estevam — Thu, 23 Apr 2015 15:57:29 GMT

Does it help to remove the UDF kernel options and mount it as

mount -t iso9660 /dev/sr0 /media/cdrom

Regards,

Fabio Estevam

Re: imx6 sata cdrom driver issue

Jon_Bagg — Fri, 08 May 2015 15:41:42 GMT

We've also discovered that cdparanoia will not function with audio disks on imx6 running mainline kernel, 3.19, 3.14 or 3.12. This is 100% repeatable...

cdparanoia -vsQ

cdparanoia III release 10.2 (September 11, 2008)

Using cdda library version: 10.2

Using paranoia library version: 10.2

Checking /dev/cdrom for cdrom...

Testing /dev/cdrom for SCSI/MMC interface

SG_IO device: /dev/sr0

Drive is neither a CDROM nor a WORM device

Testing /dev/cdrom for cooked ioctl() interface

/dev/sr0 is not a cooked ioctl CDROM.

I tried the same CDROM drive, audio disk and root filesystem on a mx53 Quick Start Board using the same kernel and cdparanoia works fine. The only differences were the mx53 device tree (imx53-qsb.dtb) and the load address (0x72000000) was changed before re-compiling the kernel (it just rebuilt uImage). It appears the kernel's imx6 sata driver has some weird quirk with CDROMs or there is a bug in the imx6 sata silicon.

cdparanoia -vsQ

cdparanoia III release 10.2 (September 11, 2008)

Using cdda library version: 10.2

Using paranoia library version: 10.2

Checking /dev/cdrom for cdrom...

Testing /dev/cdrom for SCSI/MMC interface

SG_IO device: /dev/sr0

CDROM model sensed sensed: TEAC DV-W28SS-B 1.2A

Checking for SCSI emulation...

Drive is ATAPI (using SG_IO host adaptor emulation)

Checking for MMC style command set...

Drive is MMC style

DMA scatter/gather table entries: 1

table entry size: 131072 bytes

maximum theoretical transfer: 55 sectors

Setting default read size to 27 sectors (63504 bytes).

Verifying CDDA command set...

Expected command set reads OK.

Attempting to set cdrom to full speed...

drive returned OK.

Table of contents (audio tracks only):

track length begin copy pre ch

===========================================================

1. 16305 [03:37.30] 33 [00:00.33] no no 2

2. 49937 [11:05.62] 16338 [03:37.63] no no 2

3. 29725 [06:36.25] 66275 [14:43.50] no no 2

4. 14373 [03:11.48] 96000 [21:20.00] no no 2

5. 7302 [01:37.27] 110373 [24:31.48] no no 2

6. 12793 [02:50.43] 117675 [26:09.00] no no 2

7. 9785 [02:10.35] 130468 [28:59.43] no no 2

8. 19347 [04:17.72] 140253 [31:10.03] no no 2

9. 10928 [02:25.53] 159600 [35:28.00] no no 2

10. 33980 [07:33.05] 170528 [37:53.53] no no 2

11. 24910 [05:32.10] 204508 [45:26.58] no no 2

12. 19277 [04:17.02] 229418 [50:58.68] no no 2

13. 7773 [01:43.48] 248695 [55:15.70] no no 2

TOTAL 256435 [56:59.10] (audio only)

Re: imx6 sata cdrom driver issue

Jon_Bagg — Fri, 08 May 2015 15:47:24 GMT

Software setup for above comparison....

------[ Sabre Board setup ]------

u-boot (2015.01-rc1-00014-g63f7af9)

export PATH="$PATH:/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/"

export ARCH=arm

export CROSS_COMPILE=arm-none-linux-gnueabi-

make mx6qsabresd_defconfig

make

kernel (3.19 or mainline)

export PATH="$PATH:/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/"

export ARCH=arm

export CROSS_COMPILE=arm-none-linux-gnueabi-

export LOADADDR=10008000

make imx_v6_v7_defconfig

make menuconfig

1. Enable CDROM support (Drivers -> SCSI device support -> SCSI CDROM support)

2. Enable CDROM file system support (File system -> CD-ROM/DVD Filesystems -> select all)

make uImage dtbs

sdcard (sdf in PC)

sudo dd if=arch/arm/boot/uImage of=/dev/sdf bs=512 seek=2048 && sync

sudo dd if=arch/arm/boot/dts/imx6q-sabresd.dtb of=/dev/sdf bs=512 seek=20480 && sync

u-boot environment

bootargs=console=ttymxc0,115200 root=/dev/mmcblk0p1

bootcmd=run bootargs; mmc dev 1; mmc read 0x12000000 0x800 0x2f00; mmc read 0x18000000 0x5000 0x100;bootm 0x12000000 - 0x18000000

------[ imx53 Quick Start Board setup ]------

u-boot (2015.01-rc1-00014-g63f7af9)

export PATH="$PATH:/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/"

export ARCH=arm

export CROSS_COMPILE=arm-none-linux-gnueabi-

make mx53loco_defconfig

make

kernel (3.19 or mainline)

export PATH="$PATH:/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/"

export ARCH=arm

export CROSS_COMPILE=arm-none-linux-gnueabi-

export LOADADDR=72000000

make imx_v6_v7_defconfig

make menuconfig

1. Enable CDROM support (Drivers -> SCSI device support -> SCSI CDROM support)

2. Enable CDROM file system support (File system -> CD-ROM/DVD Filesystems -> select all)

make uImage dtbs

sdcard (sdf in PC)

sudo dd if=arch/arm/boot/uImage of=/dev/sdf bs=512 seek=2048 && sync

sudo dd if=arch/arm/boot/dts/imx53-qsb.dtb of=/dev/sdf bs=512 seek=20480 && sync

u-boot environment

bootargs=console=ttymxc0,115200 root=/dev/mmcblk0p1

bootcmd_mmc=run bootargs; mmc read 0x72000000 0x800 0x2f00; mmc read 0x71000000 0x5000 0x100; bootm 0x72000000 - 0x71000000

bootcmd=run bootcmd_mmc

Re: imx6 sata cdrom driver issue

fabio_estevam — Fri, 08 May 2015 15:54:21 GMT

That's interesting.

Could you remove the SATA settings from include/configs/mx53loco.h?

#define CONFIG_CMD_SATA

#ifdef CONFIG_CMD_SATA

#define CONFIG_DWC_AHSATA

#define CONFIG_SYS_SATA_MAX_DEVICE 1

#define CONFIG_DWC_AHSATA_PORT_ID 0

#define CONFIG_DWC_AHSATA_BASE_ADDR SATA_BASE_ADDR

#define CONFIG_LBA48

#define CONFIG_LIBATA

#endif

I just want to make sure that U-boot is not doing something to the SATA controller that 'fixes' the kernel issue.

Regards,

Fabio Estevam

Re: imx6 sata cdrom driver issue

Jon_Bagg — Fri, 08 May 2015 16:39:18 GMT

I commented out the whole CONFIG_CMD_SATA section, rebuilt and dd u-boot to the mx53 sdcard. cdparanoia still works great. Also, having a CDROM on a port multiplier on imx6 sabre breaks everything connected to the port multiplier. The same port multiplier setup on the mx53-qsb works fine.

Re: imx6 sata cdrom driver issue

fabio_estevam — Fri, 08 May 2015 16:46:10 GMT

I am wondering if GP13 parameters need to be tweaked like done in arch/arm/boot/dts/imx6q-cubox-i.dts

Re: imx6 sata cdrom driver issue

Jon_Bagg — Fri, 08 May 2015 17:37:40 GMT

I had tried similar values...

&sata {

status = "okay";

fsl,transmit-level-mV = <1025>;

fsl,transmit-boost-mdB = <3330>;

fsl,transmit-atten-16ths = <9>;

fsl,receive-eq-mdB = <3000>;

};

Let me try the exact cubox's values on the Sabre. We purchased a cubox to see if the CDROM worked, it has similar issues.

Re: imx6 sata cdrom driver issue

Jon_Bagg — Fri, 08 May 2015 18:13:44 GMT

I put

&sata {

status = "okay";

fsl,transmit-level-mV = <1104>;

fsl,transmit-boost-mdB = <0>;

fsl,transmit-atten-16ths = <9>;

fsl,no-spread-spectrum;

};

in arch/arm/boot/dts/imx6q-sabresd.dts. cdparanoia is still very unhappy.

Re: imx6 sata cdrom driver issue

Jon_Bagg — Fri, 08 May 2015 19:27:27 GMT

If you apply ata_debug.patch, you can see some differences between the imx6 and imx53 when you run cdparanoia

dmesg | grep CDB

(note the time stamp on the last message to find the new one caused by cdparanoia )

cdparanoia -vsQ

dmesg | grep CDB

imx53

ata_scsi_dump_cdb: CDB (1:0,0,-571258880) 00 00 4a 01 00 00 10 00 00

CDB rbuf: [4a 01 00 00 10 00 00 00 08]

CDB rbuf: 00000000: 00 06 04 56 00 02 00 00

imx6 - third line is always zeros

ata_scsi_dump_cdb: CDB (1:0,0,-1122908160) 00 00 4a 01 00 00 10 00 00

CDB rbuf: [4a 01 00 00 10 00 00 00 08]

CDB rbuf: 00000000: 00 00 00 00 00 00 00 00

Re: imx6 sata cdrom driver issue

richard_zhu — Mon, 11 May 2015 08:41:24 GMT

I tried at my side on imx6q sd board, with the fsl's 3.14 kernel and v4.0-rc1 kernel, the cd-rom works.

NOTE: The power supply of the DVD_ROM and so on, should be provide by the external PC power supply.

I'm afraid that the power consumption of the DVD_ROM device is too huge to supplied by imx6q sd board itself.

Can you retry it when the external power supply is used?

V4.0 -rc1

---------------logs----------------------

root@imx6sxsabresd:~# dmesg | grep ata
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] Kernel command line: noinitrd console=ttymxc0,115200 mem=768M root=/dev/nfs nfsroot=10.192.224.44:/data/rootfs_home/r65037/yacto/rootfs_2014_310_110ga, tcp ip=dhcp no_console_suspend earlyprintk rw
[    0.000000] Memory: 743828K/786432K available (7211K kernel code, 388K rwdata, 2500K rodata, 372K init, 8350K bss, 26220K reserved, 16384K cma-reserved, 0K highmem)
[    0.000000]       .data : 0x809e2000 - 0x80a432c0   ( 389 kB)
[    0.184484] libata version 3.00 loaded.
[    2.168019] ahci-imx 2200000.sata: fsl,transmit-level-mV not specified, using 00000024
[    2.175990] ahci-imx 2200000.sata: fsl,transmit-boost-mdB not specified, using 00000480
[    2.184034] ahci-imx 2200000.sata: fsl,transmit-atten-16ths not specified, using 00002000
[    2.192246] ahci-imx 2200000.sata: fsl,receive-eq-mdB not specified, using 05000000
[    2.203138] ahci-imx 2200000.sata: SSS flag set, parallel bus scan disabled
[    2.210167] ahci-imx 2200000.sata: AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl platform mode
[    2.218980] ahci-imx 2200000.sata: flags: ncq sntf stag pm led clo only pmp pio slum part ccc apst
[    2.235652] ata1: SATA max UDMA/133 mmio [mem 0x02200000-0x02203fff] port 0x100 irq 312
[    2.789195] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    2.798035] ata1.00: ATAPI: HL-DT-ST DVD+/-RW GH50N, B103, max UDMA/100
[    2.807626] ata1.00: configured for UDMA/100
[   10.676048] EXT4-fs (mmcblk1p1): mounted filesystem with ordered data mode. Opts: (null)
[   10.700946] FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
root@imx6sxsabresd:~# mount -t iso9660 /dev/sr0 /mnt/cdrom/
root@imx6sxsabresd:~# df
Filesystem                                                          1K-blocks      Used Available Use% Mounted on
10.192.224.44:/data/rootfs_home/r65037/yacto/rootfs_2014_310_110ga 1922197336 673351608 1151180756 37% /
devtmpfs                                                               371912         4     371908   1% /dev
tmpfs                                                                      40         0         40   0% /mnt/.psplash
tmpfs                                                                  380292       192     380100   1% /run
tmpfs                                                                  380292        96     380196   1% /var/volatile
/dev/mmcblk1p1                                                        7494760    432628    6658372   7% /run/media/mmcblk1p1
/dev/mmcblk0p1                                                         117760        48     117712   1% /run/media/mmcblk0p1
/dev/sr0                                                                 7274      7274          0 100% /mnt/cdrom
root@imx6sxsabresd:~# uname -a
Linux imx6sxsabresd 4.0.0-rc1 #167 SMP Mon May 11 14:11:59 CST 2015 armv7l GNU/Linux
root@imx6sxsabresd:~#

3.14

----------------logs------------------------------

root@imx6sxsabresd:~# dmesg | grep ata
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
Memory policy: Data cache writealloc
Kernel command line: noinitrd console=ttymxc0,115200 mem=768M root=/dev/nfs nfsroot=10.192.224.44:/data/rootfs_home/r65037/yacto/rootfs_2014_310_110ga, tcp ip=dhcp no_console_suspend earlyprintk rw
Memory: 433184K/786432K available (7664K kernel code, 456K rwdata, 8744K rodata, 388K init, 438K bss, 353248K reserved, 0K highmem)
      .data : 0x81072000 - 0x810e42a0   ( 457 kB)
libata version 3.00 loaded.
ahci-imx 2200000.sata: fsl,transmit-level-mV not specified, using 00000024
ahci-imx 2200000.sata: fsl,transmit-boost-mdB not specified, using 00000480
ahci-imx 2200000.sata: fsl,transmit-atten-16ths not specified, using 00002000
ahci-imx 2200000.sata: fsl,receive-eq-mdB not specified, using 05000000
ahci-imx 2200000.sata: SSS flag set, parallel bus scan disabled
ahci-imx 2200000.sata: AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl platform mode
ahci-imx 2200000.sata: flags: ncq sntf stag pm led clo only pmp pio slum part ccc apst
ata1: SATA max UDMA/133 mmio [mem 0x02200000-0x02203fff] port 0x100 irq 71
ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata1.00: ATAPI: HL-DT-ST DVD+/-RW GH50N, B103, max UDMA/100
ata1.00: configured for UDMA/100
mxc_vdoa 21e4000.vdoa: i.MX Video Data Order Adapter(VDOA) driver probed
FAT-fs (mmcblk2p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
EXT4-fs (mmcblk3p1): mounted filesystem with ordered data mode. Opts: (null)
root@imx6sxsabresd:~# mount -t iso9660 /dev/s
shm/    snd/    sr0     stderr stdin   stdout
root@imx6sxsabresd:~# mount -t iso9660 /dev/sr0 /mnt/cdrom/
root@imx6sxsabresd:~# df
Filesystem                                                          1K-blocks      Used Available Use% Mounted on
10.192.224.44:/data/rootfs_home/r65037/yacto/rootfs_2014_310_110ga 1922197336 673337648 1151194716 37% /
devtmpfs                                                               216592         4     216588   1% /dev
tmpfs                                                                      40         0         40   0% /mnt/.psplash
tmpfs                                                                  380624       276     380348   1% /run
tmpfs                                                                  380624        96     380528   1% /var/volatile
/dev/mmcblk2p1                                                         117760        48     117712   1% /run/media/mmcblk2p1
/dev/mmcblk3p1                                                        7494760    432628    6658372   7% /run/media/mmcblk3p1
/dev/sr0                                                                 7274      7274          0 100% /mnt/cdrom
root@imx6sxsabresd:~# ls /mnt/cdrom/ -lt
total 4518
-r-xr-xr-x 1 root root 4423701 Jan 21 2010 WT_3978.exe
-r-xr-xr-x 1 root root 190989 Jan 21 2010 WT_3978.swf
dr-xr-xr-x 1 root root    2048 Jan 18 2010 fscommand
dr-xr-xr-x 1 root root    2048 Dec 22 2009 files
dr-xr-xr-x 1 root root    2048 Dec 22 2009 Scripts
-r-xr-xr-x 1 root root    1653 Dec 22 2009 WT_3978.html
-r-xr-xr-x 1 root root      49 Dec 22 2009 AUTORUN.INF
-r-xr-xr-x 1 root root    1150 May 20 2008 freescale.ico

Linux version 3.14.38-02099-g22acdbb (r65037@shlinux2) (gcc version 4.8.2 (GCC) ) #330 SMP PREEMPT Mon May 11 13:40:26 CST 2015

Re: imx6 sata cdrom driver issue

Jon_Bagg — Mon, 11 May 2015 13:13:38 GMT

Hongxing,

I can also get the CDROM to mount on the imx6q-sabre, just not 100% of the time. Please try

cdparanoia -vsQ

with an audio CD and see if you can get a track listing on your setup as it is 100 failure / reproducible on our setup.

Re: imx6 sata cdrom driver issue

fabio_estevam — Mon, 11 May 2015 13:25:07 GMT

Hi Jonathan,

Just a suggestion:

Could you share your rootfs with cdparanoia application installed? That would makes things easier for Richard to reproduce.

Re: imx6 sata cdrom driver issue

Jon_Bagg — Mon, 11 May 2015 13:39:59 GMT

https://lenbrook.sharefile.com/d-s59f1181de4f466eb

1. You'll have to replace the password file before booting

2. comment out this line

/etc/rc.d/rc.sovi &

at the end of /etc/rc.d/rcS

if [[ -e /var/data/intertek ]]; then

mount -o remount junk /

/usr/bin/etf_serv &

else

# start sovi

# /etc/rc.d/rc.sovi &

Re: imx6 sata cdrom driver issue

richard_zhu — Tue, 12 May 2015 02:51:17 GMT

Hi Jonathan:

Sorry, I can't download the rootfs pasted above.
It reports the following info. :smileysad:

This page can't be displayed

Make sure the web address https://lenbrook.sharefile.com is correct.
Look for the page with your search engine.
Refresh the page in a few minutes.
Make sure TLS and SSL protocols are enabled. Go to Tools > Internet Options > Advanced > Settings > Security

Anyway, did you ever do the tests with the external power supply?

What I did is listed below, the mount operations can be finished successfuly, although there maybe mount failure on the first mount sometimes.

both board and dvd_rom is powered off --> boot up board--> power on dvd_rom --> kernel booting--> mount dvd_rom.

The logs when there maybe mount failure on the first mount sometimes.

root@imx6sxsabresd:~# mount /dev/sr0 /mnt/cdrom/

UDF-fs: warning (device sr0): udf_fill_super: No partition found (2)

mount: mounting /dev/sr0 on /mnt/cdrom/ failed: Invalid argument

root@imx6sxsabresd:~# mount /dev/sr0 /mnt/cdrom/

root@imx6sxsabresd:~# df

Filesystem 1K-blocks Used Available Use% Mounted on

10.192.224.44:/data/rootfs_home/r65037/yacto/rootfs_2014_310_110ga 1922197336 673339540 1151192824 37% /

devtmpfs 216592 4 216588 1% /dev

tmpfs 40 0 40 0% /mnt/.psplash

tmpfs 380624 276 380348 1% /run

tmpfs 380624 96 380528 1% /var/volatile

/dev/mmcblk3p1 7494760 432628 6658372 7% /run/media/mmcblk3p1

/dev/mmcblk2p1 117760 48 117712 1% /run/media/mmcblk2p1

/dev/sr0 7274 7274 0 100% /mnt/cdrom

root@imx6sxsabresd:~#

Re: imx6 sata cdrom driver issue

Jon_Bagg — Tue, 12 May 2015 12:38:22 GMT

Both my boss and I tested the link and it is ok. If you are still unsuccessful, please let me know and I try something else.

Over the past several weeks I have had multiple ways of powering the CDROM....

1. slim drive CDROM connected to sabre

2. slim drive CDROM powered from external supply

3. full 5-1/4" CDROM +12v powered from external supply

4. full 5-1/4" CDROM +5v & +12v powered from external supply when using port multiplier.

Re: imx6 sata cdrom driver issue

Jon_Bagg — Tue, 12 May 2015 13:18:01 GMT

My co-worker discovered something interesting....Using a kernel with ata_debug.patch applied he noticed that before there is any file system access or cdparanoia usage, on the imx6 the cdrom's response to command "4a" (GET_EVENT_STATUS_NOTIFICATION) is always corrupted / random on the imx6 and not the imx53. The first two bytes of the response are the length and should always be 00 06.

imx53

[ 2.713046] CDB rbuf: [4a 01 00 00 10 00 00 00 08]

[ 2.717849] CDB rbuf: 00000000: 00 06 04 56 00 02 00 00

imx6

[ 3.451017] CDB rbuf: [4a 01 00 00 10 00 00 00 08]

[ 3.451024] CDB rbuf: 00000000: 01 a0 20 48 6f d6 f6 b5

He also discovered that changing the length of the previous command [ 3.422134] CDB rbuf: [5a 00 2a 00 00 00 00 00 80] from 80 to 40, the "4a" will then succeed on the imx6.

Re: imx6 sata cdrom driver issue

richard_zhu — Wed, 13 May 2015 03:01:42 GMT

Hi Joanthan:
Thanks for your debug efforts firstly.

I received your rootfs today, but I failed to login although I replace the passwd and masked the rc.sovi line in rcS.

Do you know the passwd of user(18DF)?

Here is the log:

Known <ldisc> names:
TTY         SLIP        MOUSE       PPP         STRIP       AX25
X25         6PACK       R3964       IRDA        HDLC        SYNC_PPP
SYNCPPP     HCI         PPS         M101        GIGASET     GIGASET_M101

Known <iflag> names:
IGNBRK      BRKINT      IGNPAR      PARMRK      INPCK       ISTRIP
INLCR       IGNCR       ICRNL       IUCLC       IXON        IXANY
IXOFF       IMAXBEL     IUTF8

For more details see ldattach(8).
I/O warning : failed to load external entity "/etc/sovi_info.xml"
Failed to create client object: Daemon not running
I/O warning : failed to load external entity "/etc/sovi_info.xml"
sed: /etc/sovi_info.xml: No such file or directory
sed: /var/avahi/services/*: No such file or directory
Error connecting: Error connecting: No such file or directory
I/O warning : failed to load external entity "/etc/sovi_info.xml"
/etc/rc.d/rcS: line 84: 1310 Segmentation fault sovi_hal
modprobe: chdir(3.14.38-02099-g22acdbb): No such file or directory
File does not exist: /etc/sovi_info.xml at /etc/rc.d/rc.alsa line 7
Generating keys for the dropbear ssh server:
Will output 1024 bit rsa secret key to '/var/data/etc/dropbear_rsa_host_key'
Generating key, this may take a while...
Public key portion is:
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAAAgwDjcQUsMQMlmQhVD9bYmLQno77/iJXp9N1Zz3fEkgC588Jy/4+mML7xubqN+zucmtLDh9ND0LPFc0vy4+AwZ4QRB6kmeeZuGhqevUE+poElsvzOZz7daAwMfy8hY6DZ2O7JP7V9sj5lfj/ar993bkyEvob8Bj4V7NZlZ47V0+ee81nL root@18DF
Fingerprint: md5 93:f8:d5:5a:9a:7c:e0:30:1d:37:24:01:8c:2e:97:2c
Start dropbear ssh server
sed: /etc/sovi_info.xml: No such file or directory
Unknown group "netdev" in message bus configuration file
~~~~mask rc.sovi~~~~
All done
starting pid 1341, tty '': '/sbin/getty -L ttymxc0 115200 vt100'
sed: /etc/sovi_info.xml: No such file or directory
sed: /etc/sovi_info.xml: No such file or directory
avahi-browser-sovi 0.5

18DF login: Could not open sovi_info.xml

18DF login:

BTW, it seems that the dvd_rom works refer to the boot log of kernel:

......

ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)

ata1.00: ATAPI: HL-DT-ST DVD+/-RW GH50N, B103, max UDMA/100

ata1.00: configured for UDMA/100

mmc1: SDHCI controller on 2194000.usdhc [2194000.usdhc] using ADMA

mmc2: no vqmmc regulator found

mmc2: no vmmc regulator found

scsi 0:0:0:0: CD-ROM HL-DT-ST DVD+-RW GH50N B103 PQ: 0 ANSI: 5

sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray

cdrom: Uniform CD-ROM driver Revision: 3.20

......