https://bugs.freedesktop.org/show_bug.cgi?id=76558

          Priority: high
            Bug ID: 76558
          Assignee: dri-devel@lists.freedesktop.org
           Summary: GPU lockup: radeon: wait for empty RBBM fifo failed !
                    when playing sauerbraten
          Severity: critical
    Classification: Unclassified
                OS: Linux (All)
          Reporter: fabio.ped@libero.it
          Hardware: x86 (IA32)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

Created attachment 96295
  --> https://bugs.freedesktop.org/attachment.cgi?id=96295&action=edit
dmesg after the lockup, got switching to a VT

I am using kernel 3.11.0-18.32 (default Ubuntu 13.10 kernel) with mesa from git
on a RV530. The system is usually very stable, however when running
sauerbreaten with wake6 map (sauerbraten-wake6 package on Debian/Ubuntu) this
way:
sauerbraten -lwake6

after some minutes I get the following lockup:

[ 8425.176130] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec
[ 8425.176144] radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000002845
last fence id 0x0000000000002844)
[ 8425.349835] radeon: wait for empty RBBM fifo failed ! Bad things might
happen.
[ 8425.523469] Failed to wait GUI idle while programming pipes. Bad things
might happen.
[ 8425.524520] radeon 0000:01:00.0: Saved 59 dwords of commands on ring 0.
[ 8425.530923] radeon 0000:01:00.0: (rs600_asic_reset:401)
RBBM_STATUS=0x9401C100
[ 8426.029068] radeon 0000:01:00.0: (rs600_asic_reset:421)
RBBM_STATUS=0x9401C100
[ 8426.526183] radeon 0000:01:00.0: (rs600_asic_reset:429)
RBBM_STATUS=0x9400C100
[ 8427.023299] radeon 0000:01:00.0: (rs600_asic_reset:437)
RBBM_STATUS=0x9400C100
[ 8427.023370] radeon 0000:01:00.0: failed to reset GPU
[ 8427.024701] radeon 0000:01:00.0: GPU reset failed
[ 8427.028124] radeon 0000:01:00.0: couldn't schedule ib
[ 8427.028133] [drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB !
[ 8427.057855] radeon 0000:01:00.0: couldn't schedule ib
...

Full dmesg is attached. After the lockup I can switch to/from console, but I
have to reboot because the screen is corrupted/flashing.

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