Re: [PATCH] Framebuffer: 2nd try: client notification mecanism & PM

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

> I believe solution to this is simple: always switch to kernel-owned
> console during suspend. (swsusp does it, there's patch for S3 to do
> the same). That way, Xfree (or qtopia or whoever) should clean up
> after themselves and leave the console to the kernel. (See
> kernel/power/console.c)

I tried using it on pmac, but it causes hell with XFree. I'm not sure
what's up yet, I suspect it may be XFree still doing things after
calling the RELDISP ioctl but I'm not completely sure yet.

The setup XFree + DRI is working without switching to suspend console
(with only the apm_bios emulation for XFree to suspend/restore itself)
but not when switching to suspend console right before doing the apm
emulation callbacks (which should be ignored by X since it's no longer
the frontmost process at this point).

For some reason, it seems that after we have switched to the suspend
console, we race with the X server on accel engine, and on resume, the X
server just crashes.

Ben.
 


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