Using a Gigabyte K8U-939 board (which uses an ALI/ULI chipset) with a Memorex 530L burner here. My drive refused to do better than 2.1x while burning normal single-layer DVD-R media, despite the media being capable of 16x and the drive being capable of 20x. Similarly to others, playing pressed DVD's was jerky as well - the system wasn't too pleased with the idea.
The system in question steadfastly refused to let me change /sys/module/pata_ali/parameters/atapi_dma - it kept telling me 'permission denied', despite me being root. I added " pata_ali.atapi_dma=1" to the end of the appropriate 'kernel' line in my /boot/grub/menu.lst and rebooted, and now the problem seems to be solved. To test, I burned a 4.2GB ISO. K3B set it to 16x mode, and started out at about 6.9x. By the end of the disk, it was cooking along at 15.7x. The buffers were nearly full the entire time, compared to nearly empty when it only managed 2.1x. This is consistent with this drive's performance under Hardy, so the kernel parameter fixed the DMA issue for me. As for the purported "reliability issues", I can't say one way or another after only one test, but it never gave me any issues under Hardy, and this particular burn (and subsequent read-back) went fine. -- DMA and UDMA issues with intrepid https://bugs.launchpad.net/bugs/292142 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
