[PATCH 0/1] [Oneiric] S3 early resume debug via keyboard LEDs

[Colin Ian King]

On Wed, 2011-05-25 at 10:59 -0600, Tim Gardner wrote:
> On 05/23/2011 08:06 AM, Colin King wrote:
> > From: Colin Ian King<colin.king at canonical.com>
> >
> > Add support to debug early resume hangs by flashing the keyboard LEDs
> > three times.  This should help us to see if S3 has successfully
> > transistioned out of the BIOS to the realmode path of early resume.
> >
> > Add kernel parameter acpi_sleep=s3_leds to enable the s3 debugging
> > option.  This can also be enabled by writing 8 to
> > /proc/sys/kernel/acpi_video_flags.
> >
> > Colin Ian King (1):
> >    UBUNTU: SAUCE: S3 early resume debug via keyboard LEDs
> >
> >   Documentation/kernel-parameters.txt      |    5 ++++-
> >   arch/x86/kernel/acpi/realmode/wakemain.c |   27 +++++++++++++++++++++++++++
> >   arch/x86/kernel/acpi/sleep.c             |    2 ++
> >   3 files changed, 33 insertions(+), 1 deletions(-)
> >
> >
> 
> This seems like a reasonable upstream addition. Have you sent it to Len 
> Brown et al ?

Not yet. In fact, I'd like to see how useful this is - does it give us
any real
useful debugging help or not in the Oneiric cycle. If it proves really
valuable, Id like to upstream it.   My concern is that newer (cheaper
problematic) laptops may not have LEDs in them to use, so this becomes a
redundant debugging tool.

Colin
> 
> rtg at lochsa:~/proj/linux/linux-2.6$ scripts/get_maintainer.pl -f 
> arch/x86/kernel/acpi/realmode/wakemain.c
> Len Brown <len.brown at intel.com> (supporter:SUSPEND TO RAM)
> Pavel Machek <pavel at ucw.cz> (supporter:SUSPEND TO RAM)
> "Rafael J. Wysocki" <rjw at sisk.pl> (supporter:SUSPEND TO RAM)
> Thomas Gleixner <tglx at linutronix.de> (maintainer:X86 ARCHITECTURE...)
> Ingo Molnar <mingo at redhat.com> (maintainer:X86 ARCHITECTURE...)
> "H. Peter Anvin" <hpa at zytor.com> (maintainer:X86 ARCHITECTURE...)
> x86 at kernel.org (maintainer:X86 ARCHITECTURE...)
> linux-pm at lists.linux-foundation.org (open list:SUSPEND TO RAM)
> linux-kernel at vger.kernel.org (open list)
> 
> rtg
> -- 
> Tim Gardner tim.gardner at canonical.com
>