Subject: Re: [Swsusp-devel] Re: Dropping CONFIG_PM_DISK?
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Karol Kozimor <sziwan@hell.org.pl>
Cc: Michael Frank <mhf@linuxmail.org>, Micha Feigin <michf@post.tau.ac.il>,
       Software suspend <swsusp-devel@lists.sourceforge.net>,
       Linux Kernel list <linux-kernel@vger.kernel.org>
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> Well, the AGP problem is black magic to me. Those hangs / reboots happen
> during the copying of the original kernel back (when S4 is concerned) and
> that's completely beyond me, sorry.

Where, the whole swsusp thing is very fragile by design... I'd say you
probably need to disable the AGP bridge & release all AGP memory when
doing that copying, and re-enable it on wakeup. The list of pages used
for AGP have changed between both of those...

> I did try to look into the USB problem back then, but again, I couldn't
> find anything significantly different between 2.4 and 2.6, so I backed out.
> Anyway, you're still right about that one should fix it instead of
> complaining...
> Best regards,
-- 
Benjamin Herrenschmidt <benh@kernel.crashing.org>

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