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    <head>
      <base href="https://bugs.freedesktop.org/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - R600_DEBUG=sb hangs system after playing xonotic, spring"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=66880">66880</a>
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>dri-devel@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>R600_DEBUG=sb  hangs system after playing xonotic, spring
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>pheldens@ziggo.nl
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>git
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Drivers/Gallium/r600
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>Mesa
          </td>
        </tr></table>
      <p>
        <div>
        <pre>linux 3.10.* and before
R600_DEBUG=sb
radeon 4670

crashes in xonotic and spring after indeterminate time, colours the screen with
garbage, does not crash when R600_DEBUG is unset.


all I caught so far is a kernel oops output



Oops: 0000 [#1] PREEMPT SMP 
Modules linked in: snd_hda_codec_hdmi snd_cmipci snd_opl3_lib snd_mpu401_uart
snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_hda_intel snd_hda_codec snd_hwdep
CPU: 0 PID: 1539 Comm: X Not tainted 3.10.0-rc6 #2
Hardware name: MICRO-STAR INTERNATIONAL CO.,LTD MS-7596/785GM-E51 (MS-7596),
BIOS V2.11 12/08/2010
task: ffff88022e9f9320 ti: ffff880226ca4000 task.ti: ffff880226ca4000
RIP: 0010:[<ffffffff813e74ca>]  [<ffffffff813e74ca>]
radeon_fence_process+0x8a/0x150
RSP: 0018:ffff880226ca5c28  EFLAGS: 00010246
RAX: ffffc9001079c598 RBX: 0000000000000002 RCX: ffff880226972da0
RDX: 0000000000000041 RSI: 0000000000000000 RDI: ffff880226972000
RBP: 000000000000000c R08: ffff880226972208 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000304 R12: ffff880226972df0
R13: 0000000000000002 R14: ffff880226972000 R15: ffffffff00000000
FS:  00007fe0a9315880(0000) GS:ffff88022fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffffc9001079c598 CR3: 00000002241b6000 CR4: 00000000000007f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Stack:
ffff88022695ce00 ffffffff8144f257 0000000000000292 ffffffff81948957
ffff88022eb8b560 ffff880226972000 0000000000000005 ffff880226972000
ffff880226972e20 ffff8802269725f8 0000000000000000 ffffffff813e7fdb
Call Trace:
[<ffffffff8144f257>] ? __dev_printk+0x37/0xa0
[<ffffffff813e7fdb>] ? radeon_fence_count_emitted+0x1b/0x70
[<ffffffff813fd8cd>] ? radeon_ring_backup+0x3d/0x120
[<ffffffff813d3601>] ? radeon_gpu_reset+0x81/0x210
[<ffffffff813fc930>] ? radeon_gem_wait_idle_ioctl+0xd0/0xf0
[<ffffffff813b0250>] ? drm_ioctl+0x460/0x560
[<ffffffff813fc860>] ? radeon_gem_busy_ioctl+0x120/0x120
[<ffffffff8108e8a4>] ? signal_delivered+0x54/0x70
[<ffffffff8112657a>] ? do_vfs_ioctl+0x8a/0x500
[<ffffffff810a98ce>] ? vtime_account_user+0x6e/0x90
[<ffffffff81126a3d>] ? SyS_ioctl+0x4d/0xa0
[<ffffffff8176bf49>] ? tracesys+0xd0/0xd5
Code: 48 39 d0 73 53 48 89 c3 41 b9 01 00 00 00 41 80 be 58 16 00 00 00 4d 8b
a8 e0 0b 00 00 48 8d 41 08 0f 84 86 00 00 00 48 8b 40 10 <8b> 00 48 89 da 89 c0
4c 21 fa 48 09 d0 48 39 c3 76 0c 4c 89 ea 
RIP  [<ffffffff813e74ca>] radeon_fence_process+0x8a/0x150
RSP <ffff880226ca5c28>
CR2: ffffc9001079c598
---[ end trace 2b43f4717e08f222 ]---</pre>
        </div>
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