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
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