Quote:
The problem was that the kernel would send a FLUSH_CACHE command to the LG CD-ROM drive which would make the drive inoperable by overwriting its firmware. This is because LG CD-ROM drives are not compliant with the ATAPI specification. The specification does not require an implementation of the FLUSH_CACHE command in the driver, and returning an error (or doing nothing) would have been the correct behaviour for the drive. Likewise, reusing a command is against the specification and LG has reused the FLUSH_CACHE command to modify the firmware of the drive, but they are unwilling to disclose exactly what the command does. This FLUSH_CACHE command is supposed to be supported only by CD-RW or DVD-RW devices; the LG-based CD-ROM devices are understanding this command as the UPLOAD_FIRMWARE command.
A new kernel (2.4.22-21mdk) has been released that fixes this problem in the kernel, although the CD-ROM devices are still not up to specification. New CDs and ISOs will be available shortly to correct these problems; they will come with the new kernel.
Visit the errata page for links to patches, etc. :D