Re: Suspend Problem

Hi,

On 22/01/07, Paul Sokolovsky <[email protected]> wrote:
> Monday, January 22, 2007, 5:40:12 PM, you wrote:
> > and the kernel waits for the console to be set back to the text mode
> > somewhere in the suspend code, I don't remember where, using
>
> > if (vt_waitactive(SUSPEND_CONSOLE)) {
>
>   Funky. Just to double-check: hang on *suspend* or resume? Can you
> describe symptoms of hang (what's on screen, can device be pinged,
> etc). Thanks. I never saw hang on suspend with Familiar's or OE.dev's
> OPIE builds, but there're few reports of hang on resume, and I can
> reproduce it on hx4700, but there I believe it is due to broken
> suspend/resume in w100 accel support.

The symptoms were similar to those described by Brian Wang:

> strace "echo mem > /sys/power/state" will stop at 'write(1, "mem\n",
> 4' and the shell is still responsive until "Ctrl + C" is pressed.  The
> system will subsequently go into sleep and can be waken up by the
> assigned IRQ.
>
> Without the SDL application running, suspending the system will bring
> the system to the suspended state immediately.

but since I didn't experience this personally (it happened on
LifeDrive, T3 and Zire 72 as seen in
http://hackndev.svn.sourceforge.net/viewvc/hackndev/linux4palm/linux/trunk/kernel/power/console.c?view=log#rev647),
I'm unable to give more information. The file history shows first a
fix for the hang during suspending and then more fixes for the
resuming, and the lockups can be explained by the source llines from
qt and kernel/power/console.c (provided VT_CONSOLE is enabled).

Cheers,
Andrzej
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