lkml.org 
[lkml]   [2007]   [Jan]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 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@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-01-15 15:45    [W:0.109 / U:0.264 seconds]
©2003-2014 Jasper Spaans. Advertise on this site