Difference between revisions of "Xonar EEPROM Failure"
m (→Booting from a USB memory stick/flash disk)
Revision as of 14:31, 9 February 2009
Xonar EEPROM Failure
Sometimes, Xonar 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.)
The exact cause is unknown.
There was a guess that the EEPROM chip can misinterpret certain signals if they happen together with eletrical noise, but the EEPROM is protected against that.
It seems that the problem occurs only with certain computers or motherboards, and mostly after a (re)installation of an operating system.
Restoring the EEPROM
I have written a tool that can restore the original contents of the EEPROM; there are versions for Linux and MS-DOS:
- Boot Linux (either from hard drisk or from a live CD);
- download the package directly from <http://www.alsa-project.org/~clemens/oxygen_restore_eeprom.tar.gz>, or download it from Windows and copy it over with a USB stick;
- open a console;
- unpack the package:
tar xvzf oxygen_restore_eeprom.tar.gz
- run the program, as root:
- either run first
- or run
- either run first
- follow the instructions on the screen.
The package also contains a 64-bit version (
oxygen_restore_eeprom_64) for the unlikely case that you're running a 64-bit-only Linux.
The program has been confirmed to work.
If you have a working DOS, you can use this method. (This tool is run in the same way as Asus' xee01.bat.)
- Download restoree.exe;
- boot DOS;
(MS-DOS or DR-DOS or FreeDOS; the DOS box of Windows or the DOS in an emulated computer (e.g. VMWare) will not work)
- run restoree.exe.
(source code: restoree.c)
Booting from a floppy
- Download this floppy image: floppy.img (1.44 MB);
- write it to a floppy with rawrite.exe (which you can get somewhere on the Internet);
- boot from the floppy.
Booting from a CD
- Download this ISO file: restore_eeprom.iso (1.8 MB);
- burn it to a blank CD-R;
- boot from the CD.
Booting from a USB memory stick/flash disk
- Make a bootable USB flash disk (see this description);
- download restoree.exe and put in on the flash disk;
- boot from the flash disk and run restoree.exe.
So far, five users have reported this problem: