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 ]---
these days is R600_DEBUG=sb default, could you retest? Also 3.12 should be stable enough :)
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