Beiträge von fwiarda

  • How to unpack a .nfi image file

    That worked fine. However, I discovered that when I unpack the latest DM7025 2.3 release from 27-9-2007 I get a root filesystem containing a file squashfs and a directory delta. How do I unpack this squashfs?


    Does using a squashfs also mean that most of the files in this image are read-only, making patches more difficult?


    Regards, Frits

  • Enigma2 für i386 Systeme

    It would really be a great solution. Just take a PC an put one ore more DVB-S2/S/T/C cards in in. Instead of a TV connected with HDCP use a high resolution XVGA monitor. That way we would have all the functionality of a DM8000.


    If this would be realized nobody would buy a Dreambox anymore. So, I do not think Dream Multimedia has a business case for developing this.


    Regards, Frits

  • Software von DB500 aufs PC

    With the following command you write the FLASH contents to the file /tmp/backup.img . With FTP you can transfer it back to your PC, and when needed FLASH it with DreamUp again in your Dreambox.

    Code
    cat /dev/mtd/3 >/tmp/backup.img

    Warning! Writing to /dev/mtd/3 can damage your boot loader. So be vary carefull to use '>' and not '<'.


    Regards, Frits

  • How to extract the secondstage.bin from FLASH

    I would like to extract the secondstage.bin from the FLASH memory of my Dreambox DM7025. How should I do that?


    I want to write a little plug-in that creates an .nfi file from an installed image. Writing this .nfi file to another Dreambox should make a clone of the original Dreambox.


    Creating a boot.jffs2 and a root.jffs2 file is possible with mkfs.jffs2 . If I can extract secondstage.bin then I have everything I need to build an new .nfi file with the buildimage tool.


    Regards, Frits

  • How to unpack a .nfi image file

    Is it possible to unpack a .nfi image file on an ordinary Linux system? I would like to be able to browse the files in the image without having to install the image on my Dreambox.


    What kind of format is this .nfi file? What is the internal structure?


    Regards, Frits

  • EMP Centauri 8/1 switch and 7025 bug?

    I tried that configuration on my Vantage 8/1 on the Dreambox 7025 as well. At some moment it seemed to work. Then I did a full transponder scan, and suddenly it did not work anymore.


    Then I measured that it sometimes switched through 2 inputs simultaneously, and I concluded it was a peace of scap I did not want to invest any more time in.


    I hope for you it keeps on working this way. If it does not, replace it with Spaun.


    Regards, Frits

  • EMP Centauri 8/1 switch and 7025 bug?

    Yes, I am sure that it works. I control 5 LNBs with the combination of these two switches connected to a DM7025. I connected them as follows:


    ....................................................... -out1---- 19.2E ...
    ....................................................... -out2---- 23.5E ...
    ........................... -out1----in- SAR411 ........................
    ....................................................... -out3---- 28.5E ...
    ....................................................... -out4---- 13.0E ...
    ........................... -out2--------------------------- 5.0E ...
    Dreambox ----in- SUR420 ............................................
    ........................... -out3--------------------------- not used ...
    ........................... -out4--------------------------- not used ...


    If you have 4 LNBs or less it is sufficient to use only the SAR 411 commited switch.


    If you have more then 7 LNBs you can add additional SAR411 switches to out2, out3 and out4 of the SUR420. That way you can control up to 16 LNBs.


    If even 16 LNBs is not enough you can add an additional SUR420 switch between the Dreambox and the first SUR420. That way you can control up to 64 LNBs.


    By the way, how many LNB do you have?


    There is not a technical reason that Spaun did not make an 8/1 switch. If you can put the functionality into two boxes, you can put it into one as well. According to the Vantage 8/1 documentation it shall be controlled in exactly the same way as I control the combination of the Spaun switches.


    Regards, Frits

  • EMP Centauri 8/1 switch and 7025 bug?

    What you report matches exactly with my experience with the Vantage 8/1.


    However, whatever signals the Dreambox sends to the switch, the switch shall never ever connect through 2 LNBs at the same time. I did notice that the switch does do this. That means that there is a bug in the switch.


    You are right that it does work with Enigma1 and not with Enigma2. That does not mean necessarily that there is a bug in Enigma2. It can also mean that the signals send by Enigma2 differ a little from the signals send by Enigma1, but that both are still within the limits of the Diseqc specification.


    The combination Spaun SAR 411 + SUR 420 should react to the same Disecq commands as you should send the Centauri 8/1 or the Vantage 8/1. With the Spaun and Enigma2 it works fine.


    The fact that I have measured that the Vantage 8/1 switch connects through erroneously 2 LNBs at the same time makes me believe that it is a Vantage/Centauri bug, and not a DM7025 bug.


    Regards, Frits

  • EMP Centauri 8/1 switch and 7025 bug?

    I have had problems with a Vantage 8/1 switch, which looks identical to the Centauri 8/1. Others have reported problems with the Vantage 8/1 as well.


    This switch internally contains a 4/1 committed switch and a 2/1 uncommitted switch. I configured the Dreambox accordingly. It worked on the Dreambox 500, but it did not work on the Dreambox 7025.


    I originally suspected that the Dreambox was to blame. However, experimenting further with it I discovered that the switch did do very strange things, like switching through 2 LNBs at the same time.


    I have replaced the Vantage 8/1 switch with a SPAUN SAR 411 (4/1 committed) plus a SPAUN SUR 420 (4/1 uncommitted). This combination worked out of the box.


    So I would advice you to dispose your Centauri 8/1 and replace it with SPAUN switches.


    Regards, Frits

  • Dreambox hangs when signal is poor - 2nd

    I have been testing further. With the new drivers I can get it to hang within a minute as well. On http://www.fwiarda.com/etc/dreambox/crash2.mpg a video of a crash that I did made today.


    I am using the original Dream Multimedia image from 26-3-2007. I have enabled the official Dream Multimedia dccam (although I cannot use it for decoding the Dutch KPN Digitenne DVB-T). I placed my KPN Digitenne card in a CONAX CI module inserted in the Dreambox. This configuration is fully supported by Dream Multimedia!!!


    I manually changed the frequency of one of the DVB-T bouquets from the Arnhem frequency to the Nijmegen frequency, so that I have very bad reception on this bouquet. The stations SBS 6 and RTL 7 are on the bad bouquet. The stations RTL 8 and TV Gelderland are on a good bouquet.


    I restarted the Dreambox and I recorded the output on of the RF modulator on a DVD recorder (and converted it later to the mpeg file). As soon as the Dreambox had started up, I did start zapping between the above stations. In the beginning there is still signal on RTL 8 and TV Gelderland. Then I goto RTL 7, where I have enough signal for the EPG, but not to get picture. Then I go to SBS 6. You see on the EPG lines N/A. Now the Dreambox hangs. I zap back and I get everywhere no picture and no EPG.


    The only drivers I came across that do not hang are the 17-5-2007 drivers. Another way the avoid the bug is to disable dccam in /etc/init.d/bootup.


    I think this post clearly shows the bug has not yet gone. To get it hanging one needs very poor signal on an encrypted channel and a soft CAM running (e.g. dccam from Dream Multimedia). Remove any of these three conditions and it will not hang!


    Regards, Frits

  • Dreambox hangs when signal is poor - 2nd

    Zitat

    Sorry, please *stop mixing up bugs*.


    When I experienced the bug 2 months ago for the 1st time, I noticed that the bug appears only on encrypted channels. I discovered that I could get rid of the bug by commenting out dccam in /etc/init.d/bootup and using a hardware CI module instead.


    I had very poor DVB-T signal with which I have been able to reproduce the bug within minutes (see the crash.mpg in previous posts) when I was using dccam. After I disabled dccam and installed a hardware CI module I had no problem at all for over 2 months.


    So if dccam does not work, how should I be able to verify that the problem has gone?


    Regards, Frits