[Bug 84182] New: i915: Freeze after DPMS

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84182

          Priority: medium
            Bug ID: 84182
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: i915: Freeze after DPMS
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: h.judt at gmx.at
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

I have two screens attached to a Lenovo Thinkpad T440s: One via
MiniDP->HDMI->DVI, one via VGA.

Freeze occurred on DPMS update, with the error message below. SSH access was
still possible, but I had to reboot the machine to get display working again.

00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated
Graphics Controller (rev 09) (prog-if 00 [VGA controller])
        Subsystem: Lenovo Device 220c
        Flags: bus master, fast devsel, latency 0, IRQ 56
        Memory at e0000000 (64-bit, non-prefetchable) [size=4M]
        Memory at c0000000 (64-bit, prefetchable) [size=512M]
        I/O ports at 3000 [size=64]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
        Capabilities: [d0] Power Management version 2
        Capabilities: [a4] PCI Advanced Features
        Kernel driver in use: i915

[34697.699738] ------------[ cut here ]------------
[34697.699750] WARNING: CPU: 2 PID: 2205 at
drivers/gpu/drm/i915/intel_display.c:3313
intel_crtc_wait_for_pending_flips+0xe3/0x13b()
[34697.699752] Modules linked in: cifs uvcvideo xhci_hcd vboxnetadp(O)
vboxnetflt(O) vboxdrv(O) tun videobuf2_vmalloc videobuf2_memops videobuf2_core
v4l2_common videodev usbhid iwlmvm mac80211 iwlwifi rtsx_pci_sdmmc mmc_core
cfg80211 ehci_pci ehci_hcd usbcore rtsx_pci usb_common psmouse
x86_pkg_temp_thermal coretemp microcode i2c_i801 processor snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller
snd_hda_codec evdev thermal battery snd_hwdep snd_pcm snd_timer ac
thinkpad_acpi snd [last unloaded: uvcvideo]
[34697.699800] CPU: 2 PID: 2205 Comm: X Tainted: G           O  3.16.0+ #160
[34697.699802] Hardware name: LENOVO 20AQS00900/20AQS00900, BIOS GJET77WW (2.27
) 05/20/2014
[34697.699804]  0000000000000000 ffff8802333e7c30 ffffffff8159d4e1
0000000000000000
[34697.699808]  ffff8802333e7c68 ffffffff81066511 ffffffff813d91b4
0000000000000000
[34697.699812]  ffff880235f6c000 ffff880233cb9010 ffff880235f6b000
ffff8802333e7c78
[34697.699816] Call Trace:
[34697.699823]  [<ffffffff8159d4e1>] dump_stack+0x4e/0x7a
[34697.699828]  [<ffffffff81066511>] warn_slowpath_common+0x7a/0x93
[34697.699834]  [<ffffffff813d91b4>] ?
intel_crtc_wait_for_pending_flips+0xe3/0x13b
[34697.699838]  [<ffffffff810665c9>] warn_slowpath_null+0x15/0x17
[34697.699842]  [<ffffffff813d91b4>]
intel_crtc_wait_for_pending_flips+0xe3/0x13b
[34697.699849]  [<ffffffff8108d7db>] ? finish_wait+0x60/0x60
[34697.699853]  [<ffffffff813dbb78>] intel_crtc_disable_planes+0x2b/0x148
[34697.699857]  [<ffffffff813dc7d5>] haswell_crtc_disable+0x3c/0x239
[34697.699861]  [<ffffffff813dcfd3>] intel_crtc_update_dpms+0x5c/0x6d
[34697.699865]  [<ffffffff813e026d>] intel_connector_dpms+0x43/0x4e
[34697.699872]  [<ffffffff813906fc>]
drm_mode_obj_set_property_ioctl+0x20f/0x2ac
[34697.699876]  [<ffffffff813907c4>]
drm_mode_connector_property_set_ioctl+0x2b/0x2d
[34697.699880]  [<ffffffff81383149>] drm_ioctl+0x381/0x3fb
[34697.699884]  [<ffffffff81390799>] ?
drm_mode_obj_set_property_ioctl+0x2ac/0x2ac
[34697.699890]  [<ffffffff81157184>] ? rcu_read_unlock+0x23/0x23
[34697.699896]  [<ffffffff8114f039>] do_vfs_ioctl+0x361/0x425
[34697.699900]  [<ffffffff81157182>] ? rcu_read_unlock+0x21/0x23
[34697.699902]  [<ffffffff8115735a>] ? __fget+0x6a/0x74
[34697.699906]  [<ffffffff8114f135>] SyS_ioctl+0x38/0x5f
[34697.699911]  [<ffffffff815a4d12>] system_call_fastpath+0x16/0x1b
[34697.699913] ---[ end trace 327686bcdbcc8117 ]---

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