Workaround for others with similar problems is to append: libata.force=80c to GRUB_CMDLINE_LINUX_DEFAULT= between the double quotes. If there are other parameters, separate with a space sudo update-grub sudo reboot
This will not get you SATA speeds, but at least you get UDMA/133 (instead of UDMA/33), which is still a vast improvement. This is confirmed from my dmesg: [ 1.088238] pata_acpi 0000:00:0f.0: PCI INT A -> GSI 21 (level, low) -> IRQ 21 [ 1.088295] pata_acpi 0000:00:0f.0: PCI INT A disabled [ 1.285099] pata_via 0000:00:0f.0: version 0.3.4 [ 1.285118] pata_via 0000:00:0f.0: PCI INT A -> GSI 21 (level, low) -> IRQ 21 [ 1.286650] scsi0 : pata_via [ 1.286819] scsi1 : pata_via [ 1.288565] ata1: PATA max UDMA/133 cmd 0xbc00 ctl 0xb880 bmdma 0xb400 irq 21 [ 1.288575] ata2: DUMMY [ 1.460157] ata1: FORCE: cable set to 80c [ 1.460377] ata1.00: ATA-8: ST32000542AS, CC35, max UDMA/133 [ 1.460392] ata1.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 0/32) [ 1.460411] ata1.01: ATAPI: PIONEER BD-RW BDR-207D, 1.20, max UDMA/100 [ 1.476340] ata1.00: configured for UDMA/133 [ 1.492155] ata1.01: configured for UDMA/100 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1087631 Title: SATA drive reduced to UDMA/33 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087631/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
