[Lucid] [PATCH v2] SRU: UBUNTU: SAUCE: Fix hang on resume for Dell Studio 1558, 1557, 1555

[Stefan Bader]

There also seem to be discussion upstream about that and Matthew Garret has
posted a patch which would forcefully set it in general if the BIOS does not do
so. This kind of BIOS horkage seems to be too widespread and the "other OS" does
not care about the spec and sets it. So for now I think this is reasonable for
Lucid even if we might see that generic change coming from stable at some point.

Kamal Mostafa wrote:
> Proposed patch for Lucid SRU-
> 
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/553498
> Dell Studio 1558 (Arrandale) hangs on resume from suspend
> 
> SRU Justification/Impact:
> 
> Dell Studio 1558 (and presumably other 155x models) hangs on resume from
> suspend.
> 
> TEST CASE:
> 
> I have built and tested a kernel with this patch and confirmed that it
> reliably fixes resume from suspend on my own Dell Studio 1558.
> 
> =====
> 
> Add the Dell Studio models (1558, 1557, 1555) to the list of machines
> needing 'set_sci_en_on_resume' handling; affects only the listed models.
> 
> BugLink: http://bugs.launchpad.net/bugs/553498
> 
> Signed-off-by: Kamal Mostafa <kamal at canonical.com>
Acked-by: Stefan Bader <stefan.bader at canonical.com>
> ---
>  drivers/acpi/sleep.c |   24 ++++++++++++++++++++++++
>  1 files changed, 24 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
> index 5f2c379..cf3101f 100644
> --- a/drivers/acpi/sleep.c
> +++ b/drivers/acpi/sleep.c
> @@ -453,6 +453,30 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
>  		DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"),
>  		},
>  	},
> +	{
> +	.callback = init_set_sci_en_on_resume,
> +	.ident = "Dell Studio 1558",
> +	.matches = {
> +		DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
> +		DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1558"),
> +		},
> +	},
> +	{
> +	.callback = init_set_sci_en_on_resume,
> +	.ident = "Dell Studio 1557",
> +	.matches = {
> +		DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
> +		DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
> +		},
> +	},
> +	{
> +	.callback = init_set_sci_en_on_resume,
> +	.ident = "Dell Studio 1555",
> +	.matches = {
> +		DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
> +		DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1555"),
> +		},
> +	},
>  	{},
>  };
>  #endif /* CONFIG_SUSPEND */