Public bug reported: Description of problem: Community reported one SB600 SATA issue(BZ #9412), which led to 64 bit DMA disablement for all SB600 revisions by driver maintainers with commits c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c and 4cde32fc4b32e96a99063af3183acdfd54c563f0.
But the root cause is ASUS M2A-VM system BIOS bug in old revisions like 0901, while forcing into 32bit DMA happens to work as workaround. Now it's time to withdraw 4cde32fc4b32e96a99063af3183acdfd54c563f0 so as to restore the SB600 SATA 64bit DMA capability. This patch is also adding the workaround for M2A-VM old BIOS revisions, but users are suggested to upgrade their system BIOS to the latest one if they meet this issue. This patch has been accepted by SATA driver maintainer: http://article.gmane.org/gmane.linux.ide/41082 http://article.gmane.org/gmane.linux.ide/41084 and is expected to appear from kernel version 2.6.31 But if the kernel of Ubuntu 9.10 is older than 2.6.31, please apply it. Thanks. ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- Restore SB600 SATA controller 64 bit DMA https://bugs.launchpad.net/bugs/384671 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
