linux-kernel - Re: Linux 2.6.32-rc8 - T500 fails to suspend to RAM

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Message-ID: <4B1A3C13.4060204@gmail.com>
Date:	Sat, 05 Dec 2009 12:55:15 +0200
From:	Lior Dotan <liodot@...il.com>
To:	Andy Isaacson <adi@...apodia.org>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Linux 2.6.32-rc8 - T500 fails to suspend to RAM

Andy Isaacson wrote:
> Re-adding LKML.
>
> On Fri, Dec 04, 2009 at 11:39:25PM +0200, Lior Dotan wrote:
>   
>> On Fri, Dec 4, 2009 at 10:24 PM, Andy Isaacson <adi@...apodia.org> wrote:
>>     
>>> For what it's worth, I'm testing suspend-to-ram on Ubuntu 9.10 x86_64
>>> with 2.6.32 final on a T500 and it's been pretty reliable -- I've
>>> suspended by closing the lid at least a dozen times and it hasn't locked
>>> up yet.
>>>       
>> I'm using either KDE menu to suspend or hibernate-ram from hibernate-script.
>> I will try to use the lid and see if it makes any difference.
>> The strange thing is that I tried using rc6 & rc7 and they don't work now
>> even though they used to, so I now I need to see what broke it.
>>     
>
> I mentioned the lid because of BZ #14484 which is only on Intel GMA plus
> using the lid switch to trigger suspend.  Since neither is relevant to
> you it's just a red herring. :)
>
>   
>>> 1. are you using DMAR (VT-d)?  I'm not, and I had problems on another
>>>   machine (also Core 2 Duo with GM45 graphics) when I tried suspending
>>>   with CONFIG_DMAR=y.
>>>       
>>  I disabled DMAR but still no luck.
>>     
>
> It's getting better but DMAR has still been a little problematic for me
> the last few months.  Updating to the very latest BIOS does help
> sometimes.
>
>   
>>> 2. are you running into http://bugzilla.kernel.org/show_bug.cgi?id=14484
>>>   or a similar problem?
>>> 3. (if you have GMA graphics) Are you up to date on the xorg-video-intel
>>>   driver?  I'm using KMS and xorg-video-intel 2.9.0.  2.8.x is missing
>>>   some relevant bugfixes.  (Of course if you have ATI graphics then
>>>   this isn't relevant.)
>>>
>>>       
>> I'm using the Radeon GPU so no KMS for me yet.
>>     
>
> Sounds like your Radeon or fglrx driver got updated and broke
> suspend/resume.
>   
I got some progess, when using the Intel GMA, the suspend works fine. 
The problem are only when using the radeon driver.
I am trying to use KMS for radeon but it fails to load the firmware and 
the system boots without KMS. I will disable KMS and revert the 
xf86-video-ati driver to the latest released version (I am now using the 
git version).

> -andy
>   
Thanks for your help,
Lior.
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