[Bug 17871] New: ide=nodma has no effect with Breezy's 2.6.12

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Sun Oct 16 02:31:07 UTC 2005

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           Summary: ide=nodma has no effect with Breezy's 2.6.12
           Product: Ubuntu
           Version: unspecified
          Platform: Other
        OS/Version: other
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: linux
        AssignedTo: ben.collins at ubuntu.com
        ReportedBy: ubuntu.bugzilla at alphapapa.net
         QAContact: kernel-bugs at lists.ubuntu.com

My old, quirky laptop's DMA support doesn't get along with Linux. There are
minutes-long timeouts in the boot sequence, complaining about DMA timeouts, etc.
With Hoary, "ide=nodma" added to the kernel params fixed it completely. With
Breezy--which nicely copied over the kernel params from the old
kernels--"ide=nodma" in 2.6.12 does nothing. Also plain "nodma" does nothing. As
a result, every bootup takes a REALLY LONG TIME.

2.6.12 in Knoppix works fine; it has DMA disabled by default.

I've Googled and searched here, but I can't find anything about those kernel
params in Breezy or 2.6.12. Can't find anything in the Wiki, or release notes. 
I'm left to conclude that it's due to some change in Breezy's kernel.

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