Comment 638 for bug 88746

A similar issue here on two machines:
1) Asus M2400N laptop
2) IBM xSeries 330 server with a NEC USB 2.0 controller (in PCI)

Kernel version: 2.6.26.5

The affected device is a new Samsung DVD writer. Badly slow access and dozens of damaged DVD+RWs (grrr...) are the most serious symptoms of this problem.

Resets appear in bunches of about 20 - 100 in the kernel log. There are no other error messages between two resets. (I did not switch any special debugging options on...) Resets occur approximately every 30 seconds. Some bunches of resets are followed by a fatal series of I/O errors and rewritable media destruction. In many cases, however, normal operation is resumed after minutes of resetting and waiting. (Which does not save the DVD+RW from destruction, as unexpected delays seem to be a problem, too.)

I saw some interesting backtarces complaining about bugs in the pktcdvd module. Unfortunately, they occured on a kernel tainted by tha madwifi ath_pci module. So I don't know whether I should post them here or not.

Will try the autosuspend experiment mentioned here [https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/88746], but I don't believe this could work. Autosuspend is disabled im my kernel config. Enabling it and then re-disabling it at run-time does not sound logical to me. But I would do just anything to get rid of this awful problem.