Re: 2.6.25-rc2 System no longer powers off after suspend-to-disk. Screen becomes green.

[Jesse Barnes <jesse.barnes@intel.com>]

I found the same poweroff issue on my T61.  It turned out to be related to the 
C state code disabling interrupts when it shouldn't iirc.  Booting 
with 'idle=poll' seems to work around the problem.

The "green screen" problem should be fixed (see the DRM git tree for details).

Jesse

On Tuesday, February 19, 2008 4:53 pm Jeff Chua wrote:
> On Feb 16, 2008 5:00 AM, Greg KH <gregkh@suse.de> wrote:
> > > Also, I've tried CONFIG_DETECT_SOFTLOCKUP=n, but this doesn't fix it
> > > either.
> >
> > Ok, this looks to be something else.
> >
> > > Here's the last dmesg after suspend-to-disk and hang there...
> > >
> > > CPU 1 is now offline
> > > SMP alternatives: switching to UP code
> > > PM: Syncing filesystems ... done.
> > > Freezing user space processes ... (elapsed 0.00 seconds) done.
> > > Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
> > > PM: Shrinking memory...  ^H-^Hdone (0 pages freed)
> > > PM: Freed 0 kbytes in 0.10 seconds (0.00 MB/s)
> > > ACPI: Preparing to enter system sleep state S4
> > > Suspending console(s)
> > >
> > > [ ... it just hangs here ... press power-switch does the job, and
> > > system is able to resume upon powering on ]
> >
> > Wait, this is a suspend-to-disk issue.  Totally different than the "will
> > not power off" issue.
> >
> > Can you start a new thread on this, and add the suspend people to it?
>
> I bisected down this one commit that causes the problem with
> suspend-to-disk on Lenovo X60s (i945 chipset).
>
> commit ba8bbcf6ff4650712f64c0ef61139c73898e2165
> Author: Jesse Barnes <jesse.barnes@intel.com>
> Date:   Thu Nov 22 14:14:14 2007 +1000
>
>     i915: add suspend/resume support
>
>     Add suspend/resume support to the i915 driver.  Moves some of the
>     initialization into the driver load routine, and fixes up places where
> we assumed no dev_private existed in some of the cleanup paths.  This
> allows us to suspend/resume properly even if X isn't running.
>
>     Signed-off-by: Dave Airlie <airlied@linux.ie>
>
>
> There where problem reverting the some i915 files with the latest
> linux git pull, so I copied those i915*.{h,c} prior to this commit,
> and problem went away.
>
>
> Suspend-to-ram, suspend-to-disk all working now.
>
>
> Thanks,
> Jeff.