linux-kernel - Suspend hangs since 2.6.34

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Message-ID: <20100609175356.GA17332@x61.home>
Date:	Wed, 9 Jun 2010 19:53:56 +0200
From:	Tino Keitel <tino.keitel+xorg@...ei.de>
To:	intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Suspend hangs since 2.6.34

Hi,

as of kernel 2.6.34 I sometimes get a strange hang during suspend to
RAM. After echo mem > /sys/power/state, the suspend script hangs, Xorg
eats 100% CPU, and the desktop is frozen. I can kill the script and the
computer will then suspend and resume fine. The kernel log shows
nothing interesting when the hang happens:

usblp0: removed
usbcore: deregistering interface driver dvb_usb_vp7045
dvb-usb: Twinhan USB2.0 DVB-T receiver (TwinhanDTV Alpha/MagicBox II)
successfully deinitialized and disconnected.
PM: Syncing filesystems ... done.

Is this a known problem? I had rock stable suspend with 2.3.33.x. The
computer is a Mac mini Core2 Duo with i945 graphics. I use KMS. I will
compile a kernel with suspend debug to get more information if the hang
happens next time.

Regards,
Tino
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