linux-kernel - Re: Suspend hangs since 2.6.34

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Date:	Thu, 10 Jun 2010 10:05:05 +0400
From:	Michael Tokarev <mjt@....msk.ru>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Tino Keitel <tino.keitel+xorg@...ei.de>,
	intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>
Subject: Re: Suspend hangs since 2.6.34

10.06.2010 03:42, Rafael J. Wysocki пишет:
> On Wednesday, June 09, 2010, Tino Keitel wrote:
>> 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.

Sounds very much like the problem I have with 2.6.34 final.  Did not
happen with 2.6.34-rc7 which suspended just fine, but happens quite
regularly on 2.6.34 final - not every suspend but each 2nd or 3rd
attempt.  I stopped doing suspend-to-ram due to this, because it's
unreliable.  Suspend-to-disk works just fine.

>> Is this a known problem?
>
> No, it's not.
>
>> 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.

It's amd780g athlon-based machine here, with radeon graphics, also with KMS.

> Yes,  please try to get more information.

Got it ;)

/mjt
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