Member Avatar for pan phyu

I can't hear sound without install sound driver but i can see without install graphic driver.may i know why? somebody help me!

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  • Latest Post Latest Post by CimmerianX

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As suggested, the display works without a vendor driver because the OS supplies a generic video driver that is enough to show the screen; for Windows this is the “Microsoft Basic Display Adapter.” Audio hardware is more likely to need a vendor driver to expose the correct playback endpoint, handle codecs and jack sensing, so sound often won’t appear until the proper audio driver is installed. Microsoft Basic Display Adapter. (support.microsoft.com)

There are two common situations to keep in mind: onboard audio chips (Realtek, Conexant, IDT, etc.) require their own drivers for full function, while HDMI/DisplayPort audio is normally provided by the graphics driver package (so a missing GPU driver can remove the HDMI audio endpoint). For examples of vendor packaging and HDMI audio behavior see the Intel documentation and NVIDIA support notes. Fix sound or audio problems in Windows. (intel.com)

Practical checklist (quick, actionable):

  • Inspect Device Manager: check Display adapters and Sound, video and game controllers for errors or missing devices.
  • If audio device is missing or flagged, try Windows Update first, then download the audio driver from the motherboard/laptop maker or the chipset/GPU vendor (not third‑party driver sites).
  • If using HDMI/DP to a TV/monitor, install the GPU driver package so the HDMI audio endpoint appears.
  • Run Windows’ “Playing Audio” troubleshooter and restart the Windows Audio services; as a last resort uninstall the device in Device Manager and reboot to let Windows reinstall it. (support.microsoft.com)

Summary note for : the behavior is normal — display falls back to a generic driver, audio usually needs the correct driver to create usable outputs. Prefer OEM/vendor driver packages (laptop OEM for laptops) and check the default playback device if sound still does not appear. (support.microsoft.com)

Member Avatar for CimmerianX

Most OSs will have built in, basic video drivers. Good enough to display a screen. You would load the specific drivers from manufacturers to realize the full potenntial of the card.

Sound is not an essential part of using a system. Older cards might be able to take advantage of some generic sound drivers that ship with some OSes, but usually you want the manufacturer driver anyway.

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