Difference between revisions of "Xonar EEPROM Failure"

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This may be a bug in the BIOS.
This may be a bug in the BIOS.
Affected systems:
{| border="1"
! Mainboard
! Chipset
| Asus M2N32-SLI Deluxe
| nForce 590 SLI
| Asus M3N-HT Deluxe
| nForce 780a SLI
| Asus P5N-D
| nForce 750i SLI
| Asus P5N-T Deluxe
| nForce 780i SLI
| Asus Striker II Formula
| nForce 780i SLI
| Dell Dimension 9200
| Intel P965
| Dell Optiplex 755
| Intel Q35
(All Asus systems use a Phoenix Award BIOS.)
==Restoring the EEPROM==
==Restoring the EEPROM==

Revision as of 18:56, 26 November 2010


Xonar EEPROM Failure

Sometimes, Xonar PCI/PCI-E cards randomly fail to be recognized.

The driver refused to load or to install, and in Device Manager, the card is shown as an unknown sound card or as "C-Media Oxygen audio device". Putting the card into another slot or another computer does not help.

This happens when the EEPROM on the card gets overwritten.
(This EEPROM stores the PCI subsystem vendor and product IDs; when it gets overwritten, the main chip cannot read the subsystem IDs and uses a default ID (13F6:8788) which is not recognized by the Xonar driver.)

To reliably detect whether the EEPROM was overwritten, go into Device Manager, show the properties page of the device, go to the "Details" tab, and select the property "Hardware IDs", and look at the values after "SUBSYS_":

PCI\VEN_13F6&DEV_8788&SUBSYS_82691043 OK (Xonar D2)
PCI\VEN_13F6&DEV_8788&SUBSYS_82751043 OK (Xonar DX)
PCI\VEN_13F6&DEV_8788&SUBSYS_82B71043 OK (Xonar D2X)
PCI\VEN_13F6&DEV_8788&SUBSYS_83141043 OK (Xonar HDAV1.3)
PCI\VEN_13F6&DEV_8788&SUBSYS_83271043 OK (Xonar DX)
PCI\VEN_13F6&DEV_8788&SUBSYS_834F1043 OK (Xonar D1)
PCI\VEN_13F6&DEV_8788&SUBSYS_835C1043 OK (Xonar Essence STX)
PCI\VEN_13F6&DEV_8788&SUBSYS_835D1043 OK (Xonar Essence ST)
PCI\VEN_13F6&DEV_8788&SUBSYS_835E1043 OK (Xonar HDAV1.3 Slim)
PCI\VEN_13F6&DEV_8788&SUBSYS_838E1043 OK (Xonar DS)
PCI\VEN_13F6&DEV_8788&SUBSYS_84281043 OK (Xonar Xense)
PCI\VEN_13F6&DEV_8788&SUBSYS_84671043 OK (Xonar DG)
PCI\VEN_13F6&DEV_8788&SUBSYS_878813F6 overwritten EEPROM


The exact cause is unknown.
It seems that the problem occurs only with certain computers or motherboards, and after booting from a CD (i.e., (re)installation of an operating system, or using a live CD).

This may be a bug in the BIOS.

Restoring the EEPROM

I have written a tool that can restore the original contents of the EEPROM.
Because it needs direct access to the hardware, it cannot be run inside Windows.


If you have a working DOS, you can use this method. (This tool is run in the same way as Asus' xee01.bat.)

  1. Download restoree.exe;
  2. boot DOS;
    (this works only with a real DOS such as MS-DOS or DR-DOS or FreeDOS; an emulated DOS such as the DOS box of Windows or the DOS in an emulated computer (e.g. VMWare) will not work)
  3. run restoree.exe.

(source code: restoree.c)

Booting from a floppy

  1. Download this floppy image: floppy.img (1.44 MB);
  2. write it to a floppy with rawrite.exe (which you can get somewhere on the Internet);
  3. boot from the floppy.

Booting from a CD

  1. Download this ISO file: restore_eeprom.iso (1.8 MB);
  2. burn it to a blank CD-R;
  3. boot from the CD.

Booting from a USB memory stick/flash disk

  1. Make a bootable USB flash disk (see this description), but do not put the xee01 files on the disk;
  2. download restoree.exe and put in on the flash disk;
  3. boot from the flash disk and run restoree.exe.

Booting Linux

The Linux Xonar driver has the EEPROM restoring tool integrated since kernel 2.6.30 (which was released June 2009).
Just boot your installed Linux, or any recent Linux live CD.





Bug Reports

Many users have reported this problem:

(and private e-mail)

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