Re: [2.6.29-rc2][Suspend regression][DRM ???? bisected]

[etienne <etienne.basset@numericable.fr>]

Hello,

etienne wrote:
> hello,
>
> With 2.6.29-rc2 (and rc1) i cannot resume from suspend to ram (echo 
> mem > /sys/power/state). Computer correctly suspends, but never wakes 
> up (screens stays black and everything is unresponsive)
>                   
> It has been working flawlessly in all prior kernel.
> I tried a bisection and it "seems" to point to :
> ====================================
> a9d51a5ad1154b5b20add1e8d30a5564f8aabbe9 is first bad commit
> commit a9d51a5ad1154b5b20add1e8d30a5564f8aabbe9            Author: 
> Dave Airlie <airlied@linux.ie>                     Date:   Sun Dec 7 
> 12:02:21 2008 +1000                     
>    drm: reorganise start and load.
>                                     Make sure we have the primary node 
> so the device can add maps.
>                                                                    
> Signed-off-by: Dave Airlie <airlied@redhat.com>              
> ========================================
>
> HOWEVER, I am not quite sure my bisect was correct; I mean, some "bad 
> bisect" had a different behavior (resume produces  a garbage screen, 
> computer locked)
> and after bisect 57a6297e52b32ff402291a7d8fd802f83e746e52 all "bad" 
> kernel wouldn't start X, init=/bin/bash booted fine but no resume
>
> I tried  to revert but got errors
> =============================
> etienne@etienne-desktop:~/linux-2.6$ git revert  
> a9d51a5ad1154b5b20add1e8d30a5564f8aabbe9
> warning: too many files, skipping inexact rename detection
> Auto-merged drivers/gpu/drm/drm_stub.c
> CONFLICT (content): Merge conflict in drivers/gpu/drm/drm_stub.c
> Automatic revert failed.  After resolving the conflicts,
> mark the corrected paths with 'git add <paths>' or 'git rm <paths>' 
> and commit the result.
> =========================
> Please find attached bisect log, lspci (from 2.6.28-rc8) , and .config 
> (2.6.29rc2)
>
> I have a radeon card
> 01:00.0 VGA compatible controller: ATI Technologies Inc RV370 5B60 
> [Radeon X300(PCIE)]
> Packages :
> xserver-xorg-video-radeon            
> 1:6.9.0+git20081003.f9826a56-0ubuntu2.1
> ii  xserver-xorg                              
> 1:7.4~5ubuntu3                              the X.Org X 
> server                                                   ii  
> xserver-xorg-core                         
> 2:1.5.2-2ubuntu3                            Xorg X server - core 
> server                  
> I'm willing to test patches and ideas of course :)
>
> Except for this regression, everything works fine for me, I migrated 
> to ext4 and it "feels" a huge win especially on "rm" and fsck :))
>
> best regards,
> Etienne
>
>
>
hello,

as my bisect directed to drm but as I was unable to revert the commit, I 
took my 2.6.29rc2 kernel,  removed drivers/gpu/drm and include/drm and 
replaced them  with 2.6.28 files.
Rebooted into this new kernel, suspended to ram and ...same bug :(
so maybe there a bug in drm, but there another one elsewhere...
I checked /var/log/messages from a working and a non working kernel, and 
there's absolutely _nothing_ in non-working kernels
in working kernel i see suspend beginning like this :
Jan 19 21:50:47 etienne-desktop kernel: PM: Syncing filesystems ... done.
Jan 19 21:50:47 etienne-desktop kernel: [drm] Num pipes: 1


Are there any patch i could try?
Is it possible to run a git bisect excluding all drm commits to find the 
other bug?


regards
Etienne