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radeon crashes with radeonfb - system locked



Hi my dear debian-powerpc-list

Im having another problem with my ati radeon car in my powerbook g4

Graphics card:
0000:00:10.0 VGA compatible controller: ATI Technologies Inc RV350 [Mobility 
Radeon 9600 M10]

I recently changed my yaboot.conf with an:
 append="root=/dev/mapper/hda4_crypt video=radeonfb:off"
to stop using kms.

Now Im using radeonfb:
# cat /proc/fb
0 radeondrmfb
1 OFfb ATY,Jasper

But: Since then I get some system crashes, that leaves me with an unresponding 
x-server. The only thing I can do is to ssh into the machine and reboot it.

maybe its the same bug as:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=576657
but many people get this error messages with an ati card, is this an upstream 
bug.

kern.log tells me this

Sep 12 05:28:47 powerbook kernel: [22688.174323] [drm:radeon_fence_wait] 
*ERROR* fence(c2233180:0x000C3ABA) 692ms timeout going to reset GPU
Sep 12 05:28:47 powerbook kernel: [22688.175707] [drm] CP reset succeed 
(RBBM_STATUS=0x00000140)
Sep 12 05:28:47 powerbook kernel: [22688.175712] [drm] GPU reset succeed 
(RBBM_STATUS=0x00000140)
Sep 12 05:28:47 powerbook kernel: [22688.175718] [drm:radeon_fence_wait] 
*ERROR* fence(c2233180:0x000C3ABA) 700ms timeout
Sep 12 05:28:47 powerbook kernel: [22688.175723] [drm:radeon_fence_wait] 
*ERROR* last signaled fence(0x000C3ABA)
Sep 12 05:28:47 powerbook kernel: [22688.189957] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(10).
Sep 12 05:28:47 powerbook kernel: [22688.189968] [drm:radeon_cs_ioctl] *ERROR* 
Faild to schedule IB !
Sep 12 05:28:47 powerbook kernel: [22688.191848] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(11).
Sep 12 05:28:47 powerbook kernel: [22688.191857] [drm:radeon_cs_ioctl] *ERROR* 
Faild to schedule IB !
Sep 12 05:28:47 powerbook kernel: [22688.213228] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(12).
Sep 12 05:28:47 powerbook kernel: [22688.213240] [drm:radeon_cs_ioctl] *ERROR* 
Faild to schedule IB !
Sep 12 05:28:47 powerbook kernel: [22688.234047] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(13).
Sep 12 05:28:47 powerbook kernel: [22688.234058] [drm:radeon_cs_ioctl] *ERROR* 
Faild to schedule IB !
Sep 12 05:28:47 powerbook kernel: [22688.255927] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(14).
Sep 12 05:28:47 powerbook kernel: [22688.255939] [drm:radeon_cs_ioctl] *ERROR* 
Faild to schedule IB !
Sep 12 05:28:47 powerbook kernel: [22688.256638] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(15).
Sep 12 05:28:47 powerbook kernel: [22688.256646] [drm:radeon_cs_ioctl] *ERROR* 
Faild to schedule IB !
Sep 12 05:28:47 powerbook kernel: [22688.283089] [drm:radeon_ib_schedule] 
*ERROR* radeon: couldn't schedule IB(0).


if anybody got an advice how to fix this, many thx
greetz
drz


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