[Bug 94900] HD6950 GPU lockup loop with various steam games (octodad[always], saints row 4[always], dead island[always], grid autosport[sometimes])

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94900

--- Comment #23 from Alex <alex at linuxfr.eu> ---
This also happens 100% of the time under Faeria and Rocket League.

The bug that appeared during a Rocket League session :
[36447.794626] BUG: unable to handle kernel paging request at ffffc90401d40ffc
[36447.794656] IP: [<ffffffffc023c79a>] radeon_ring_backup+0xda/0x190 [radeon]
[36447.794697] PGD 40e099067 PUD 0
[36447.794710] Oops: 0000 [#1] SMP
[36447.794723] Modules linked in: pci_stub vboxpci(OE) vboxnetadp(OE)
vboxnetflt(OE) snd_hrtimer vboxdrv(OE) binfmt_misc intel_rapl x86_pkg_te
mp_thermal intel_powerclamp kvm_intel kvm irqbypass crct10dif_pclmul
crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper
cryptd serio_raw hid_logitech_hidpp lpc_ich joydev input_leds
snd_hda_codec_realtek arc4 snd_hda_codec_hdmi snd_hda_codec_generic ath9k
ath9k_
common snd_usb_audio ath9k_hw snd_usbmidi_lib ath mac80211 cfg80211
snd_hda_intel snd_hda_codec snd_ctxfi snd_hda_core snd_hwdep snd_seq_midi
snd_seq_midi_event snd_pcm snd_rawmidi snd_seq snd_seq_device snd_timer snd
mei_me mei soundcore tpm_infineon shpchp mac_hid it87 hwmon_vid co
retemp parport_pc ppdev lp parport autofs4 hid_logitech_dj uas usb_storage
wacom hid_generic usbhid
[36447.794999]  hid mxm_wmi amdkfd amd_iommu_v2 radeon psmouse firewire_ohci
firewire_core crc_itu_t atl1c i2c_algo_bit ttm ahci drm_kms_helpe
r libahci syscopyarea sysfillrect sysimgblt fb_sys_fops e1000e drm ptp pps_core
video fjes wmi
[36447.795083] CPU: 2 PID: 3667 Comm: Xorg Tainted: G           OE  
4.4.0-36-generic #55-Ubuntu
[36447.795109] Hardware name: Gigabyte Technology Co., Ltd. To be filled by
O.E.M./Z77X-UD5H, BIOS F4 03/09/2012
[36447.795137] task: ffff8804072c5280 ti: ffff8800d9ed0000 task.ti:
ffff8800d9ed0000
[36447.795158] RIP: 0010:[<ffffffffc023c79a>]  [<ffffffffc023c79a>]
radeon_ring_backup+0xda/0x190 [radeon]
[36447.795197] RSP: 0000:ffff8800d9ed3c48  EFLAGS: 00010202
[36447.795213] RAX: ffffc90002313000 RBX: 00000000ffffffff RCX:
0000000000000000
[36447.795233] RDX: 0000000000000000 RSI: ffffc90401d40ffc RDI:
0000000000096440
[36447.795253] RBP: ffff8800d9ed3c78 R08: ffff88010c011e00 R09:
8000000000000163
[36447.795274] R10: 0000000000000000 R11: ffffffff81ccf5ea R12:
ffff8800358494e0
[36447.795294] R13: ffff8800358494b8 R14: 0000000000025911 R15:
ffff8800d9ed3cc0
[36447.795314] FS:  00007fc9397a1a00(0000) GS:ffff88041ed00000(0000)
knlGS:0000000000000000
[36447.795337] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[36447.795354] CR2: ffffc90401d40ffc CR3: 000000040a177000 CR4:
00000000000406e0
[36447.795374] Stack:
[36447.795380]  ffff880035848000 ffff880035848000 ffff8800358494e0
ffff8800d9ed3cc0
[36447.795406]  ffff8800358494e0 0000000000000000 ffff8800d9ed3d30
ffffffffc020acdd
[36447.795430]  ffff880035848740 00ff880400000001 ffff880035848018
ffff8803216e3000
[36447.795455] Call Trace:
[36447.795472]  [<ffffffffc020acdd>] radeon_gpu_reset+0xcd/0x330 [radeon]
[36447.795492]  [<ffffffff815ac18d>] ? fence_wait_timeout+0x7d/0x160
[36447.795521]  [<ffffffffc023a51e>] radeon_gem_handle_lockup.part.3+0xe/0x20
[radeon]
[36447.795553]  [<ffffffffc023b4bf>] radeon_gem_wait_idle_ioctl+0xdf/0x130
[radeon]
[36447.795584]  [<ffffffffc003b742>] drm_ioctl+0x152/0x540 [drm]
[36447.795611]  [<ffffffffc023b3e0>] ? radeon_gem_busy_ioctl+0xe0/0xe0 [radeon]
[36447.795639]  [<ffffffffc020804c>] radeon_drm_ioctl+0x4c/0x80 [radeon]
[36447.795659]  [<ffffffff81220c1f>] do_vfs_ioctl+0x29f/0x490
[36447.795677]  [<ffffffff81103471>] ? SyS_futex+0x81/0x180
[36447.795693]  [<ffffffff81220e89>] SyS_ioctl+0x79/0x90
[36447.795709]  [<ffffffff8182dfb2>] entry_SYSCALL_64_fastpath+0x16/0x71
[36447.795727] Code: fb c0 48 85 c0 49 89 07 74 6c 41 8d 7e ff 31 d2 48 c1 e7
02 eb 07 49 8b 07 48 83 c2 04 49 8b 74 24 08 8d 4b 01 89 db 48 8
d 34 9e <8b> 36 89 34 10 41 23 4c 24 54 48 39 d7 89 cb 75 da 4c 89 ef e8
[36447.795850] RIP  [<ffffffffc023c79a>] radeon_ring_backup+0xda/0x190 [radeon]
[36447.795882]  RSP <ffff8800d9ed3c48>
[36447.795893] CR2: ffffc90401d40ffc
[36447.809449] ---[ end trace ffefc2413ee46759 ]---

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