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dead audio after DTD calculator, need help

post #1 of 5
Thread Starter 
Greetings,

Short version. DTD calculator for an overscan problem killed audio. Can't find what's changed to fix it.

Long version:

Newbie at display management, and I have found myself in a bit of a situation. I'm working on an overscan issue on a dual-use (TV and PC monitor) Vizio (720p, no internal options to turn off overscanning). The computer is a Lenovo running W7 home premium with an Intel G41 chipset. Display link is HDMI, routed through an audio amplifier (A/V same HDMI cable)

I was having no luck getting the overscan fixed using the included tools, so I thought I'd try DTD calculator. I did a "registry hack" from the program. Didn't have an evident display effect, but killed the audio. W7 now no longer recognizes an audio device. Can't seem to figure out how to undo what change I made.

Things I tried:
-Did a registry backup prior to the change, but for some reason it's refusing to import the backup. Not sure about that. (realized afterwards that system restore had been turned off, too, drat.)
-Located the "DTD_[1,2,3,4,5] keys in the relevant place in the registry, and compared against the backup in a text editor. Doesn't seem different.
-did a find search in the registry for the DTD key that DTD calculator supposedly would have written, couldn't find it, unless I was doing something wrong.
-Removed amplifier from chain, directed straight to screen. No change.
-picked other resolutions. No change.
-Reinstalled the Intel driver (downloaded current version from Intel website.) Includes HDMI audio driver. No change.

I'm at a loss here. I can't even find what's been changed, so I don't know where to fix it. Can anyone give me some direction on undoing this?

(BTW, I'm reasonably proficient in Linux, so if there's a way to do it from there, say, running a liveCD of ubuntu and then using that to enable restoring the old registry backup, that's an option, I guess. But I'm open to anything.)
post #2 of 5
Try this safe procedure to remove all monitor driver leftovers in the registry:
  • Start [Select]
  • My Computer [right-click]
  • Properties [Select]
  • Advanced System Settings {Select]
  • Environment Variables [Select]
  • New [Select] (Under User variables ...)
  • Set field "Variable name" to devmgr_show_nonpresent_devices
  • Set field "Variable value" to 1.
  • OK [Select]
  • OK [Select]
  • Now go to Device Manager (Start->Computer->Properties [right click])
  • Menu option "View" [Select]
  • Monitors [Select]
  • Uninstall any greyed-out display device.
  • Tick on the option "Delete all driver files for this device" (if applicable)
Also uninstall current GenericPnP monitor driver, then reboot.
post #3 of 5
Quote:
Originally Posted by Tulli View Post

Try this safe procedure to remove all monitor driver leftovers from the registry:
  • Start [Select]
  • My Computer [right-click]
  • Properties [Select]
  • Advanced System Settings {Select]
  • Environment Variables [Select]
  • New [Select] (Under User variables ...)
  • Set field "Variable name" to devmgr_show_nonpresent_devices
  • Set field "Variable value" to 1.
  • OK [Select]
  • OK [Select]
  • Now go to Device Manager (Start->Computer->Properties [right click])
  • Menu option "View" [Select]
  • Menu option "Show hidden devices" [Select]
  • Monitors [Select]
  • Uninstall any greyed-out display device.
  • Tick on the option "Delete all driver files for this device" (if applicable)
Also uninstall current GenericPnP monitor driver.

I'll delete this post after Tulli fixes his... no point in redundantly repeating things.
post #4 of 5
Right, thanks vladd.
post #5 of 5
Thread Starter 
Thanks, I'll give that a shot.
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