drm regression on resume with -rc7 (bisected to 797fd5b9dad12a100c81b5782573a41259728cb1)

drm regression on resume with -rc7 (bisected to 797fd5b9dad12a100c81b5782573a41259728cb1)

[Cédric Godin]

Hello,

When resuming my laptop from a -rc7, my X session reacted weirdly.
Reading the dmesg log, I had :

May 12 21:58:03 enea kernel: [  122.627332] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(0).
May 12 21:58:03 enea kernel: [  122.627342] [drm:radeon_cs_ioctl] 
*ERROR* Faild to schedule IB !
May 12 21:58:03 enea kernel: [  123.251198] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(1).
May 12 21:58:03 enea kernel: [  123.251207] [drm:radeon_cs_ioctl] 
*ERROR* Faild to schedule IB !
May 12 21:58:04 enea kernel: [  123.626341] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(2).
May 12 21:58:04 enea kernel: [  123.626351] [drm:radeon_cs_ioctl] 
*ERROR* Faild to schedule IB !
May 12 21:58:04 enea kernel: [  124.256505] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(3).
May 12 21:58:04 enea kernel: [  124.256514] [drm:radeon_cs_ioctl] 
*ERROR* Faild to schedule IB !
May 12 21:58:05 enea kernel: [  124.626191] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(4).
May 12 21:58:05 enea kernel: [  124.626200] [drm:radeon_cs_ioctl] 
*ERROR* Faild to schedule IB !
May 12 21:58:05 enea kernel: [  125.059095] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(5).

And so on until IB(15)

This was not the case with a -rc5 kernel nor with a kernel without KMS 
(radeon.modeset=0).

Bisection gives me (on drivers/gpu):

# bad: [b57f95a38233a2e73b679bea4a5453a1cc2a1cc9] Linux 2.6.34-rc7
# good: [01bf0b64579ead8a82e7cfc32ae44bc667e7ad0f] Linux 2.6.34-rc5
git bisect start 'v2.6.34-rc7' 'v2.6.34-rc5' '--' 'drivers/gpu/'
# bad: [3515387ba90ef2c38602f4d52c4d5ec5fc95ae5c] drm/radeon/kms: fix 
panel scaling adjusted mode setup
git bisect bad 3515387ba90ef2c38602f4d52c4d5ec5fc95ae5c
# good: [88b045077a1462a47503137fd4ca0c31772819ca] drm/radeon: Fix sparc 
regression in r300_scratch()
git bisect good 88b045077a1462a47503137fd4ca0c31772819ca
# bad: [404b017d00a9f472bdf725a06892d42f1cba5ed8] 
drivers/gpu/drm/drm_memory.c: fix check for end of loop
git bisect bad 404b017d00a9f472bdf725a06892d42f1cba5ed8
# bad: [ccb2ad579f910e6146adf4eb3aa50325253ee8c9] drm/radeon/kms/agp The 
wrong AGP chipset can cause a NULL pointer dereference
git bisect bad ccb2ad579f910e6146adf4eb3aa50325253ee8c9

with 797fd5b9dad12a100c81b5782573a41259728cb1 being the culprit

commit 797fd5b9dad12a100c81b5782573a41259728cb1
Author: Marek Olšák <maraeo@gmail.com>
Date:   Tue Apr 13 02:33:36 2010 +0200

     drm/radeon/kms: r300 fix CS checker to allow zbuffer-only fastfill

     Signed-off-by: Marek Olšák <maraeo@gmail.com>


PS: if i've done something wrong, say it, i'm always ready to learn ;-)

Cedric

Re: drm regression on resume with -rc7 (bisected to 797fd5b9dad12a100c81b5782573a41259728cb1)

[Joerg Platte]

Am Wednesday, 12. May 2010 schrieb Cédric Godin:
Hi,

> When resuming my laptop from a -rc7, my X session reacted 
weirdly.
> Reading the dmesg log, I had :
> 
> May 12 21:58:03 enea kernel: [  122.627332] 
[drm:radeon_ib_schedule]
> *ERROR* radeon: couldn't schedule IB(0).
> May 12 21:58:03 enea kernel: [  122.627342] 
[drm:radeon_cs_ioctl]

same problem here with 2.6.34 and Thinkpad T40 (Radeon Mobility 
7500). The problem appeared after my upgrade to 2.6.34. 
2.6.33.X does not have this problem. Is there any patch 
available that I can test?

regards,
Jörg

Re: drm regression on resume with -rc7 (bisected to 797fd5b9dad12a100c81b5782573a41259728cb1)

[Cédric Godin]

On 05/18/10 20:06, Joerg Platte wrote:
> Am Wednesday, 12. May 2010 schrieb Cédric Godin:
> Hi,
>
>    
>> When resuming my laptop from a -rc7, my X session reacted
>>      
> weirdly.
>    
>> Reading the dmesg log, I had :
>>
>> May 12 21:58:03 enea kernel: [  122.627332]
>>      
> [drm:radeon_ib_schedule]
>    
>> *ERROR* radeon: couldn't schedule IB(0).
>> May 12 21:58:03 enea kernel: [  122.627342]
>>      
> [drm:radeon_cs_ioctl]
>
> same problem here with 2.6.34 and Thinkpad T40 (Radeon Mobility
> 7500). The problem appeared after my upgrade to 2.6.34.
> 2.6.33.X does not have this problem. Is there any patch
> available that I can test?
>
> regards,
> Jörg
> --
> 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/
>    
Yes, now there is a patch thanks to Jerome Glisse. I tested it and it's 
working here.
Maybe you could test it too ?

https://bugzilla.kernel.org/attachment.cgi?id=26484

regards,
Cédric

Re: drm regression on resume with -rc7 (bisected to 797fd5b9dad12a100c81b5782573a41259728cb1)

[Joerg Platte]

Am Friday, 21. May 2010 schrieb Cédric Godin:
Hi,

> Yes, now there is a patch thanks to Jerome Glisse. I tested 
it and it's
> working here.
> Maybe you could test it too ?
> 
> https://bugzilla.kernel.org/attachment.cgi?id=26484

I tested the patch and it works! Thank you for the link to the 
patch!

regards,
Jörg