[Bug 88307] CPU: 0 PID: 1194 at drivers/gpu/drm/i915/intel_display.c:3361 intel_crtc_wait_for_pending_flips+0x1b1/0x1c0 [i915]()

Thu Jan 15 06:20:00 PST 2015

https://bugs.freedesktop.org/show_bug.cgi?id=88307

--- Comment #7 from zebulon <zebul666 at hotmail.com> ---
I have the same bug:
Jan 15 14:48:13 callisto kernel: [10212.224481] WARNING: CPU: 3 PID: 2202 at
/build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_display.c:3324
intel_crtc_wait_f
or_pending_flips+0x16c/0x180 [i915]()
Jan 15 14:48:13 callisto kernel: [10212.224485] Modules linked in: pci_stub
vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) bnep rfcomm binfmt_misc
xts gf128
mul dm_crypt rtsx_usb_ms nls_iso8859_1 memstick wl(POE) uvcvideo btusb
videobuf2_vmalloc videobuf2_memops bluetooth videobuf2_core dell_wmi
v4l2_common videodev sp
arse_keymap dell_laptop 6lowpan_iphc media intel_rapl x86_pkg_temp_thermal
dcdbas snd_hda_codec_hdmi intel_powerclamp snd_hda_codec_realtek
snd_hda_codec_generic s
nd_hda_intel kvm_intel snd_hda_controller kvm snd_hda_codec snd_hwdep snd_pcm
snd_seq_midi snd_seq_midi_event crct10dif_pclmul cfg80211 snd_rawmidi snd_seq
crc32_p
clmul snd_seq_device snd_timer ghash_clmulni_intel cryptd shpchp parport_pc snd
ppdev i8k soundcore lpc_ich coretemp joydev serio_raw lp mei_me mac_hid mei
parport
 rtsx_usb_sdmmc rtsx_usb hid_generic usbhid hid i915 psmouse i2c_algo_bit
drm_kms_helper r8169 ahci drm libahci mii wmi video
Jan 15 14:48:13 callisto kernel: [10212.224590] CPU: 3 PID: 2202 Comm: Xorg
Tainted: P           OE 3.16.0-29-generic #39-Ubuntu
Jan 15 14:48:13 callisto kernel: [10212.224594] Hardware name: Dell Inc.
Inspiron 3521/06RYX8, BIOS A12 10/25/2013
Jan 15 14:48:13 callisto kernel: [10212.224598]  0000000000000009
ffff880231fefbf8 ffffffff8178218a 0000000000000000
Jan 15 14:48:13 callisto kernel: [10212.224605]  ffff880231fefc30
ffffffff8106fedd 0000000000000000 ffff88024341b000
Jan 15 14:48:13 callisto kernel: [10212.224611]  ffff88003f498210
ffff880243637000 ffff880243637000 ffff880231fefc40
Jan 15 14:48:13 callisto kernel: [10212.224618] Call Trace:
Jan 15 14:48:13 callisto kernel: [10212.224634]  [<ffffffff8178218a>]
dump_stack+0x45/0x56
Jan 15 14:48:13 callisto kernel: [10212.224644]  [<ffffffff8106fedd>]
warn_slowpath_common+0x7d/0xa0
Jan 15 14:48:13 callisto kernel: [10212.224652]  [<ffffffff8106ffba>]
warn_slowpath_null+0x1a/0x20
Jan 15 14:48:13 callisto kernel: [10212.224698]  [<ffffffffc041b08c>]
intel_crtc_wait_for_pending_flips+0x16c/0x180 [i915]
Jan 15 14:48:13 callisto kernel: [10212.224709]  [<ffffffff810b9730>] ?
prepare_to_wait_event+0x100/0x100
Jan 15 14:48:13 callisto kernel: [10212.224752]  [<ffffffffc041db53>]
intel_crtc_disable_planes+0x33/0x1c0 [i915]
Jan 15 14:48:13 callisto kernel: [10212.224792]  [<ffffffffc041e120>]
ironlake_crtc_disable+0x50/0x980 [i915]
Jan 15 14:48:13 callisto kernel: [10212.224839]  [<ffffffffc0323f53>] ?
drm_modeset_lock+0x33/0xf0 [drm]
Jan 15 14:48:13 callisto kernel: [10212.224849]  [<ffffffff81787f72>] ?
mutex_lock+0x12/0x30
Jan 15 14:48:13 callisto kernel: [10212.224893]  [<ffffffffc041f4e7>]
intel_crtc_update_dpms+0x67/0xa0 [i915]
Jan 15 14:48:13 callisto kernel: [10212.224937]  [<ffffffffc0423b59>]
intel_connector_dpms+0x59/0x70 [i915]
Jan 15 14:48:13 callisto kernel: [10212.224978]  [<ffffffffc031ae19>]
drm_mode_obj_set_property_ioctl+0x399/0x3a0 [drm]
Jan 15 14:48:13 callisto kernel: [10212.225011]  [<ffffffffc031ae50>]
drm_mode_connector_property_set_ioctl+0x30/0x40 [drm]
Jan 15 14:48:13 callisto kernel: [10212.225036]  [<ffffffffc0309a4f>]
drm_ioctl+0x1df/0x680 [drm]
Jan 15 14:48:13 callisto kernel: [10212.225048]  [<ffffffff811f5208>]
do_vfs_ioctl+0x2c8/0x4a0
Jan 15 14:48:13 callisto kernel: [10212.225055]  [<ffffffff81784e0d>] ?
__schedule+0x39d/0x890
Jan 15 14:48:13 callisto kernel: [10212.225061]  [<ffffffff811f5461>]
SyS_ioctl+0x81/0xa0
Jan 15 14:48:13 callisto kernel: [10212.225069]  [<ffffffff8178a1ad>]
system_call_fastpath+0x1a/0x1f
Jan 15 14:48:13 callisto kernel: [10212.225074] ---[ end trace 7732ebafafe26b9d
]---

I am using the oibaf ppa that compils latest intel driver
I am using Ubuntu 14.10 with 3.16.0-29 kernel and Xorg 1.16.0-1ubuntu1.2 and a
HD 4000 with xserver-xorg-video-intel 2:2.99.917+git1501131931.b7feec~gd~u

I can't reproduce it but it happens from time to time since 1 month or even
more

ssh into the machine and run export DISPLAY=:0 && unity --replace used to work
but anymore, now I restart Xorg with service lightdm restart after switch to
console

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