On Sat, Feb 13, 2010 at 4:46 PM, Jeff Garzik <jeff@xxxxxxxxxx> wrote: > On 01/26/2010 11:33 PM, Robert Hancock wrote: >> >> Mike Cui reported that his system with an NVIDIA MCP79 (aka MCP7A) chipset >> stopped working with 2.6.32. The problem appears to be that 2.6.32 now >> enables >> the FPDMA auto-activate optimization in the ahci driver. The drive works >> fine >> with this enabled on an Intel AHCI so this appears to be a chipset bug. >> Since MCP79 is a fairly recent NVIDIA chipset and we don't have any info >> on >> whether any other NVIDIA chipsets have this issue, disable FPDMA AA >> optimization >> on all NVIDIA AHCI controllers for now. >> >> Should address http://bugzilla.kernel.org/show_bug.cgi?id=14922 >> >> Signed-off-by: Robert Hancock<hancockrwd@xxxxxxxxx> >> >> --- >> >> Mike, can you test this out and make sure this resolves the problem for >> you? > > Sigh... we never did hear back from Mike or NVIDIA on this one, did we? > I've been watching for a response, and haven't seen one to date. No, I haven't seen a response. It's pretty apparent it should fix the problem based on earlier testing, but it would be nice to find out for sure which chipsets this affects. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
