HDMI Audio Problems on Inspiron 1525

Discussion in 'Dell' started by stativa_mkd, Feb 14, 2008.

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  1. vbdino

    vbdino Newbie

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    I just got my Inspiron 1525 and I also don't get the sound out through HDMI. The picture is perfect but no sound. From the sound icon in the control panel, I have the internal speaker and spidf, but not hdmi.

    Has anyone found a solution for this thread?
     
  2. vbdino

    vbdino Newbie

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    I call Dell last night and got confirmation that HDMI doesn't have sound capability. It was only intended only for video. Strangely, there is an Intel High Definition Audio HDMI that is loaded and working. But the only place where it is seen, is in the device manager.

    Anyway, if it is true that it is only video, then there is the s/pdif exit on the right side often mentionned as a s-video exit on many web sites and in the manual. But the manual also states that audio output can be obtain from this connector, so it would be a s-video connector with 7 wires instead of two. In the manual, it shows two types of adapter that allows to connect a tv with s-video or component, plus audio which can be either standard audio (probably stereo) or numerical audio. Unfornately the book doesn't specify the part number for this adapter. Technical support didn't know the part number neither did the Dell part department. It can only be found in the US Dell site, but not in Canada.

    So the real important thing to know, is how does it displays on a 50 inches plasma, LG 50PC3D at 1024x768 60Hz. The image is full screen and really good. You could easily watch the tv monitor from 10 feets and browse the internet, for exemple.

    But, as there is allways one but, many movies have a ratio of 2:45 and it is usually no problems to zoom, in other to get rid of the black bars. Strangely, the LG tv disables the zoom when receiving signals from a PC even if it is through a hdmi cable.

    So as a HTPC, it is not good solution unless I find a software capable of zooming correctly, but that takes all the fun of using media center with a usb remote.

    Since there isn't many thread on htpc, this one might help you decide between a htpc and a dvd player.

    Btw, I like this inspiron 1525. A good buy even though I expected to connect it to my home theater. At least I know now what a htpc could look like.
     
  3. Bchen06

    Bchen06 Notebook Consultant

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    Try setting HDMI audio to default, log out and the log back in with the cable in. If that doesn't work, try restarting the comptuer with the cable in and set as default audio.
     
  4. Coldjonny

    Coldjonny Notebook Consultant

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    ummm.. in M1530 threads it seems that if you go to audio settings, you can change sound output to HDMI.
    HDMI can definitely carry audio and M1530s at least can output audio through it. I don't know about the 1525.
     
  5. vbdino

    vbdino Newbie

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    My Inspiron only has the SigmaTel High definition audio, with two possible output. The speaker|earphones or the spdif s-video connector.

    I found that the Intel(R) High Definition Audio HDMI is made by Microsoft http://www.microsoft.com/whdc/device/audio/HDAudioDDI.mspx.

    This device contains many files from Microsoft, but one from Intel which is IntcHdmi.sys ver 6.10.01.2035.

    In my sound devices, I have:

    Intel(R) High Definition Audio HDMI
    SigmaTel High Definition Audio CODEC

    In my sound dialog from the control panel, I have only the two possible output for the SigmaTel.

    So it looks like I have an HDMI audio as a device, but not recognized by Vista as a manageable sound device to select for output.
     
  6. vbdino

    vbdino Newbie

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    I have new developpement. I tried to connect my laptop to my pioneer Elite receiver instead of directly to the LG plasma. As soon as I did that, a new sound device appeared in the sound setting window. It was the Intel High Definition Audio HDMI. Note that at that point the LG was off. Then I tried the sound test and it worked. Next I turned on the LG and I got a full screen picture of Vista. Then I started a movie "Over the Hedge". I had full 5.1 digital sound but the picture was not full screen when on the plasma while it was on the laptop. I change the player to window size and the image on the screen when back to full screen to show the vista desktop and my movie, still with 5.1 sound, all through the HDMI cable.

    Then I don't exactly remember what I did, but the player failed and from that point, I was no longer able to get HDMI audio.

    But I least so far, it is official, that HDMI connector has the hardware capability to send also audio 5.1.

    But that is not all, next I tried to uninstall the Intel High Definition Audio HDMI device including removing the driver itself. Then I rescan for new devices, and Vista installed instead a new device named "périphéque de sortie numérique HDMI" which is probably in english, "Numerical output device HDMI", something like that. The version is 6.0.6000.16386.

    It has 5 files: drmk.sys, hdaudio.sys, portcls.sys, sysfxul.dll, wmalfxgfxdsp.dll, all written by Microsoft.

    With this device, I was able to quickly reconnect to my Pioneer and then to my LG plasma, which is connected to my Pioneer. Unless I display directly only to the plasma, I had trouble with resolution while having both screen ON. Also the sound device only support stereo sound.

    So the solution will be to come back to the Intel High Definition Audio HDMI that has less bug.

    I will for sure call Dell and ask for better support or a clear statement that even though sound can be obtain, it is not a supported feature.

    Quite a chalenging quest to get this puppy working correctly.
     
  7. vbdino

    vbdino Newbie

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    I came back to the Intel High Definition Audio HDMI, which is part the graphic driver installation from Dell, for the Inspiron 1525.

    Since I had previously made Vista detect the audio device, I still have the other driver present, so it reinstalled itself. What I did is that I upgraded the device by searching the driver from the directory where the graphic driver is. There is a subdirectory for hdmi. Now I have the INTEL audio hdmi as before and as before, it doesn't show up in the Sound setup.

    There is a bug with this driver.
     
  8. vbdino

    vbdino Newbie

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    I just spoked to Dell support and after resuming what I have discovered, I asked if they support the audio for the hdmi port. The answer is that even though the hardware has what it takes, the design of the inspiron 1525 was for video only. The Intel chipset offers also audio but Dell had no intention of supporting it. At least for now because there is no real demand for it.

    For now, the solution is:

    1- make sure there is no hdmi cable connected
    2- uninstall the Intel High Definition Audio HDMI and select to remove the driver as well
    3- Click on the action menu and rescan for new hardware
    4- Vista will install a different driver that supports only stereo but it will be available in your sound dialog.

    The final solution will probably come from Intel as their chipset's drive evolves. Since there isn't that many laptop with hdmi, thus not that people like us who tries to get it working, there isn't much work trying to fix a problem they are not aware. That's the case with Dell, so probably is with Intel.
     
  9. jnoname

    jnoname Newbie

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    SOLUTION

    Intel has new drivers but Dell has not made them available yet. When you try to install the Intel drivers it says it has not been approved by the manufacturer.

    Run Process Explorer from Microsoft.

    http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx

    This is going to tell us where the temporary files the Intel driver extracts.

    Go to the Intel site and locate the drivers for the GM965 chipset. This is the chipset used on the Inspiron 1525. Run the install and get to the point where it brings up a box stating it has not been approved by the manufacturer. Now, go back to Process Explorer and scroll to the end, it should show you the directory where the install extracted the files to. Inside that directory will be an HDMI directory. Next, go to the Windows Device Manager and select the HDMI audio device. Click the upgrade driver button and point it at the HDMI directory that the Intel driver extracted.

    I'm writing this from memory from last night but that should be pretty close. I could not get my HDMI sound to work at all previously. As soon as I installed the driver it began working. It also seems to auto-detect if the HDMI is in use. If so it begins routing the sound, once unplugged it goes back to the speakers. Very nice.
     
  10. vbdino

    vbdino Newbie

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    Thanks for the info, I will try it.
     
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