DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:in-reply-to:references:date:message-id:subject:from:to
         :cc:content-type:content-transfer-encoding;
        b=rfXfjiW7Edolu5WNqUrE9XOdqWXQdgz8wutLxC0240L/FMtqmgLjP+13yvNjzZRM7n
         sCXEOOcPSQv0mLtqJTWoJB2ii8sHZ+EOLzgMhOQQqN+fcAOlmdS+gGbFDUPsayt8EOyE
         a4YhF2HQO17H2OsvLL5+ffeeJhiPpK0thYTuA=
MIME-Version: 1.0
In-Reply-To: <20101119130329.675ebf0b@jbarnes-desktop>
References: <AANLkTi=emVB3kqR322Man01sDd0DFecxzDENVCS6B1jj@mail.gmail.com>
	<AANLkTik4Bj2_D_oz8jWxzKSKz16S=Yv6884iHA072bJe@mail.gmail.com>
	<20101119130329.675ebf0b@jbarnes-desktop>
Date: Fri, 19 Nov 2010 22:35:19 +0100
Message-ID: <AANLkTimQQ62MKEs1WkuCMHqMQejC40rLBFc2KGF=SDHF@mail.gmail.com>
Subject: Re: Regressions in resume on intel graphics
From: Zdenek Kabelac <zdenek.kabelac@gmail.com>
To: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        airlied@redhat.com, intel-gfx@lists.freedesktop.org
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8BIT
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 2656
Lines: 68

2010/11/19 Jesse Barnes <jbarnes@virtuousgeek.org>:
> On Fri, 12 Nov 2010 10:17:07 +0100
> Zdenek Kabelac <zdenek.kabelac@gmail.com> wrote:
>
>> 2010/11/12 Zdenek Kabelac <zdenek.kabelac@gmail.com>:
>> > Hi
>> >
>> > I've noticed that after resume ?with 2.6.36 kernel I need to switch
>> > between console and back to Xorg to get usable Xsession again.
>> > (my hw - T61, gma965, 4GB)
>> >
>> > I've played bisect game - ?and this is the first broken kernel:
>> >
>> > ---
>> > commit 8fd4bd22350784d5b2fe9274f6790ba353976415
>> > Author: Jesse Barnes <jbarnes@virtuousgeek.org>
>> > Date: ? Wed Jun 23 12:56:12 2010 -0700
>> >
>> > ? ?vt/console: try harder to print output when panicing
>> > ---
>>
>> I've been able to boot and test with 2.6.37-rc1-00170-gf6614b7
>> - and this problem seems to be fixed in this version (vt.c file seems
>> to be gone?).
>
> This is really weird; there was one issue Dave tracked down related to
> lockdep and the new oops code, but I think it's been fixed. ?And it
> should manifest as something other than a GPU hang...
>

Well - unsure - how this worked ok - for 2.6.37-rc1-00170-gf6614b7 (I
could try few more times - though this kernel seems to be crashing for
various other reasons - so I've had quite few testruns before I've
been able to test this in some very limited X environment - so maybe
it was just some lucky case - but I still keep it on my disk)

Anyway - as an update - I'm now regularly using 2.6.37-rc2 - and it
has exactly same problems - as in my original report -  so the problem
has not magically disappeared and it is still there.  Is there
anything I should try ?

Basically every time after resume from suspend I have to switch from X
to console and back to get usable screen back. Without this I seen
only black screen with mouse over it - is there some way for reverting
of this patch - or maybe just disabling some part of it ?


To have reliable resume I still have to keep drm_kms_help thread
disable - otherwise I observe GPU errors.
Switch between consoles is 'relatively' easy to overcome.

And another thing which might help -  during suspend/resume  I could
usually see weird switch to console with some special text on the
whole console screen -

[ ###.... ]
[ ###.... ]

where  '###' is some changing number - and it seems to be different
between resumes.
Also I should add I'm using  'no-console-suspend'  kernel boot option.

Zdenek
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/