[help wanted]DM6467T interface error: failed to create display device instance

Eric,

See if /dev/video2 and /dev/video2 are present in your filesys.

Thx,

Brijesh Jadav

Hi Brijesh,

Yes, I have /dev/video2 in my filesys. I also have video0, video1, video3 in my filesys. I forgot to mention that I was able to run the demo using remote control. The problem only happens when I try to run demo using command line.

If you have anything coming up in your mind, please let me know. I appreciate it.

Thanks,

Eric

hi，Eric

        I meet the same problem with DM6467. Besides this problem,I  can't  run the encode demo successfully  using remote control,but I can run the decode demo using remote control.Did  you meet any issue when run encode demo and how to solve it?

Thanks

Yun

Hi,

Can you try loopback sample applications, which comes with the release? This is to make sure that the capture driver is able to detect the input and run the loopback.

Thanks,

Brijesh Jadav

Hi Brijesh,

I actually solved the problem yesterday. I boot up the EVM thru NFS and everything turns out fine. Now I do have another question. Since I have my encoded data now, how can I transfer it to my computer?

Sorry about this many rookie questions. I really appreciate your help.

Thanks,

Eric

Hi Yun,

I couldn't be able to run the encode demo first time either using remote control. It was because that I used NTSC video as the input. I switched to 720P and it worked. Try it.

Eric

Hi Eric,

I have tried to swetch to 720p video as the input,and run the encode demo and enncode and decode demo successfully! Thank you for your advice very much! 

Eric,I have another problem. When I tried to boot up the EVM thru NFS following the GSG,but some errors occured.

My commands was as follows:

EVM # setenv bootcmd 'nboot 0x80700000 0 0x160000;bootm'

EVM # setenv rootpath /home/xinqinyun/workdir/filesys

EVM # setenv nfshost 192.168.1.6

EVM # setenv bootargs 'mem=112M console=ttyS0,115200n8 root=/dev/nfs nfsroot=$(nfshost):$(rootpath),nolock ip=dhcp

vpif_display.ch2_numbuffers=0 vpif_display.ch3_numbuffers=0'

EVM # boot

However,the board didn't finish booting,the errors were as follow:

Root-NFS: Server returned error -13 while mounting /tftpboot/$(nfshost):$(rootp)

VFS: Unable to mount root fs via NFS, trying floppy.

VFS: Cannot open root device "nfs" or unknow-block(2,0)

Please append a correct ''root=" boot option; here are the available partitions:

0300                         39070080    hda   driver:  ide-gd

   0301                             27342598  hda1

   0302                              11727450 hda2

1f00                                                     128 mtdblock0 (driver?)

1f01                                                   1280 mtdblock0 (driver?)

1f02                                                   4096 mtdblock0 (driver?)

1f03                                               125568 mtdblock0 (driver?)

Kernel panic - not syncing: VFS: Unable to mount root fs on unkown-block(2, 0)

Backtrce:  …………

Did you meet any issue when boot with nfs and how you successfully boot with nfs?

I could mount the nfs after I boot with hda1,so I judged that the  nfs server in my host  works well. 

 I really appreciate your more help.

Yun

I didn't have such problems....

Eric,

 Thank you all the same! Could you tell me your  host OS and DVSDK version? Mine is Ubuntu 9.04 and DVSDK_3_10_00_11?

Yun 

Hi , I have met the same problem, and still not solve it. 

Hi, Eric,

when i input "./interface",the same error message as your "Interface Error: Failed to create display device instance".  I woundered how do you fix it.

Thanks,

James

hi Brijesh:

I encountered the same question on DM6467T when I execute ./interface, and I cannot find /video2 under the /workdir/filesys/dev. So, how to add these files?

Thank you

Addison