Hi there guys I have the following:
- when booting my notebook using Legacy Bios mode the sound card is visible
- when booting the notebook under UEFI Bios, the sound card "disappears"
As a result I have tried DOUBLE Windows 7 Ultimate (64) installation: in Legacy mode all works fine - In UEFI mode, no sound (sound card is not visible in the device manager and there's no "unknown device" in the list).
This could be a firmware bug. I'd like to use UEFI Bios and have the soundcard visible!
Please don't suggest to run diags, as I have said, in Legacy mode the sound card is visible and fully funcrional. BTW I can't run DELL Pre-Boot utilities because I have wiped out disk partitions before installing
DELL Latitude E6520 with BIOS A01
The notebook has passed the ePSA diagnostics. No problems detected.
My 2 cents:
- A) Some UEFI settings in the BIOS may conflict, technical support should tell how to configure properly
- B) Faulty firmware (A01) - Hope in a quick fix
Whatever, two words from a DELL Technician would help a lot
I am having the same problem on a E6420 with A02 and A04 as well. From what I am reading about UEFI vs BIOS, it seems that something is missing from the UEFI to initalize that particular device.
What's also interesting is that I am also having trouble with the GPS portion of the EVDO card installed. The device shows up with a yellow exclamation when I build the system with UEFI.