[Bug 87940] [drm] stuck on render ring

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87940

--- Comment #1 from bruno.pagani at ens-lyon.org ---
Note that sometimes, the hangs does just results in this in dmesg:

[  125.447556] [drm] stuck on render ring
[  125.448949] [drm] GPU HANG: ecode 0:0xf5dffffe, in sddm-greeter [699],
reason: Ring hung, action: reset

While some others, it results in this:

[   56.401780] [drm] stuck on render ring
[   56.403295] [drm] GPU HANG: ecode 0:0xf5dffffe, in sddm-greeter [606],
reason: Ring hung, action: reset
[   58.403887] ------------[ cut here ]------------
[   58.403920] WARNING: CPU: 1 PID: 291 at drivers/gpu/drm/i915/intel_pm.c:3486
gen6_enable_rps_interrupts+0x71/0x80 [i915]()
[   58.403922] Modules linked in: joydev mousedev arc4 nls_iso8859_1 nls_cp437
vfat fat nvram iTCO_wdt iTCO_vendor_support dell_wmi sparse_keymap mxm_wmi
iwlmvm mac80211 dell_laptop led_class dcdbas intel_rapl x86_pkg_temp_thermal
intel_powerclamp kvm_intel iwlwifi kvm serio_raw psmouse pcspkr i2c_i801
cfg80211 rtsx_pci_ms memstick lpc_ich rfkill thermal fan snd_hda_codec_hdmi
int3403_thermal battery snd_hda_codec_realtek dell_smo8800 ac wmi evdev
snd_hda_codec_generic mac_hid snd_hda_intel snd_hda_controller snd_hda_codec
snd_hwdep snd_pcm snd_timer snd mei_me shpchp soundcore mei ie31200_edac
edac_core processor sch_fq_codel coretemp hwmon msr nfs lockd sunrpc fscache
algif_skcipher af_alg hid_multitouch usbhid hid dm_crypt dm_mod btrfs xor
raid6_pq sd_mod crc_t10dif rtsx_pci_sdmmc mmc_core atkbd
[   58.403971]  libps2 crct10dif_pclmul ahci crct10dif_common crc32_pclmul
libahci ghash_clmulni_intel xhci_hcd aesni_intel ehci_pci libata ehci_hcd
aes_x86_64 lrw gf128mul glue_helper ablk_helper usbcore scsi_mod cryptd
rtsx_pci usb_common i8042 serio i915 button intel_gtt i2c_algo_bit video
drm_kms_helper drm i2c_core crc32c_intel
[   58.403994] CPU: 1 PID: 291 Comm: kworker/1:2 Not tainted 3.17.6-1-ARCH #1
[   58.403996] Hardware name: Dell Inc. XPS 15 9530/XPS 15 9530, BIOS A05
04/16/2014
[   58.404006] Workqueue: events intel_gen6_powersave_work [i915]
[   58.404008]  0000000000000000 00000000dd78ecab ffff880417d83d58
ffffffff81537c3e
[   58.404012]  0000000000000000 ffff880417d83d90 ffffffff8107079d
ffff880417190000
[   58.404016]  ffff880417197150 0000000000040000 ffff880417197118
ffff880417190000
[   58.404019] Call Trace:
[   58.404026]  [<ffffffff81537c3e>] dump_stack+0x4d/0x6f
[   58.404031]  [<ffffffff8107079d>] warn_slowpath_common+0x7d/0xa0
[   58.404034]  [<ffffffff810708ca>] warn_slowpath_null+0x1a/0x20
[   58.404044]  [<ffffffffa009cd31>] gen6_enable_rps_interrupts+0x71/0x80
[i915]
[   58.404055]  [<ffffffffa00a494f>] intel_gen6_powersave_work+0x63f/0x10f0
[i915]
[   58.404060]  [<ffffffff81088e05>] process_one_work+0x145/0x400
[   58.404063]  [<ffffffff810893cb>] worker_thread+0x6b/0x4a0
[   58.404067]  [<ffffffff81089360>] ? init_pwq.part.22+0x10/0x10
[   58.404070]  [<ffffffff8108e2ea>] kthread+0xea/0x100
[   58.404074]  [<ffffffff811c0000>] ? unpoison_memory+0x110/0x2d0
[   58.404077]  [<ffffffff8108e200>] ? kthread_create_on_node+0x1b0/0x1b0
[   58.404081]  [<ffffffff8153dbbc>] ret_from_fork+0x7c/0xb0
[   58.404084]  [<ffffffff8108e200>] ? kthread_create_on_node+0x1b0/0x1b0
[   58.404086] ---[ end trace 7136c274616ffa5f ]---

After what I have to restart X, since it hangs seemingly forever.

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