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Date: Mon, 15 Jan 2007 08:44:51 -0500 From: Jeff Garzik <jeff@...zik.org> To: Tejun Heo <htejun@...il.com> CC: Arjan van de Ven <arjan@...radead.org>, Faik Uygur <faik@...dus.org.tr>, Robert Hancock <hancockr@...w.ca>, linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: ahci_softreset prevents acpi_power_off Tejun Heo wrote: > Arjan van de Ven wrote: >> I'd be interested in finding out how to best test this; if the bios is >> really broken I'd love to add a test to the Linux-ready Firmware >> Developer Kit for this, so that BIOS developers can make sure future >> bioses do not suffer from this bug... > > As reported, this is almost a butterfly effect. ->softreset method is > only used during initialization and error recovery of ATA devices which > has almost nothing to do with the rest of the system. This is almost > like 'changing my mixer input to line-in makes power off fail'. (it's > more related due to ATA ACPI stuff and maybe that's why this happens but > I'm trying to make a point here.) It's quite possible that the BIOS in question wants AHCI in some specific state at poweroff. Jeff - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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