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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** Tags added: kernel-da-key

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1447751

Title:
  CPU: 0 PID: 2802 at
  /build/buildd/linux-3.19.0/drivers/gpu/drm/i915/intel_display.c:1256
  assert_plane.constprop.87+0x7b/0x90 [i915]()

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  [  396.209024] ------------[ cut here ]------------
  [  396.209071] WARNING: CPU: 0 PID: 2802 at /build/buildd/linux-3.19.0/drivers/gpu/drm/i915/intel_display.c:1256 assert_plane.constprop.87+0x7b/0x90 [i915]()
  [  396.209072] plane A assertion failure (expected on, current off)
  [  396.209103] Modules linked in: veth xt_conntrack ipt_REJECT nf_reject_ipv4 ebtable_filter ebtables pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) ip6table_filter ip6_tables binfmt_misc vboxdrv(OE) xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc joydev intel_rapl snd_hda_codec_realtek iosf_mbi snd_hda_codec_generic x86_pkg_temp_thermal snd_hda_codec_hdmi intel_powerclamp hid_logitech_hidpp coretemp snd_hda_intel kvm_intel snd_soc_rt5640 snd_hda_controller snd_soc_rl6231 kvm snd_soc_core snd_hda_codec snd_compress snd_hwdep snd_pcm_dmaengine dm_multipath scsi_dh snd_pcm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_seq_midi snd_seq_midi_event
  [  396.209130]  snd_rawmidi aesni_intel i915 aes_x86_64 lrw gf128mul drm_kms_helper glue_helper snd_seq ablk_helper cryptd snd_seq_device snd_timer drm snd i2c_algo_bit mei_me lpc_ich mei soundcore mac_hid nuvoton_cir dw_dmac rc_core 8250_dw i2c_hid dw_dmac_core i2c_designware_platform video i2c_designware_core snd_soc_sst_acpi spi_pxa2xx_platform hid_generic parport_pc ppdev lp parport autofs4 hid_logitech_dj usbhid hid btrfs xor raid6_pq e1000e ptp pps_core ahci libahci sdhci_acpi sdhci [last unloaded: vmw_vmci]
  [  396.209134] CPU: 0 PID: 2802 Comm: Xorg Tainted: G           OE  3.19.0-15-generic #15-Ubuntu
  [  396.209135] Hardware name:                  /D54250WYK, BIOS WYLPT10H.86A.0035.2015.0126.1814 01/26/2015
  [  396.209138]  ffffffffc0758e10 ffff8803fbd0b728 ffffffff817c2205 000000008afa8afa
  [  396.209140]  ffff8803fbd0b778 ffff8803fbd0b768 ffffffff8107595a 0000000000000000
  [  396.209142]  0000000000000000 ffff8800c87ec000 ffff8800c9417000 ffff8800c9417000
  [  396.209143] Call Trace:
  [  396.209152]  [<ffffffff817c2205>] dump_stack+0x45/0x57
  [  396.209156]  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
  [  396.209159]  [<ffffffff810759d6>] warn_slowpath_fmt+0x46/0x50
  [  396.209188]  [<ffffffffc06f552b>] assert_plane.constprop.87+0x7b/0x90 [i915]
  [  396.209213]  [<ffffffffc06fd6a1>] hsw_disable_ips+0x41/0x190 [i915]
  [  396.209235]  [<ffffffffc06fda68>] intel_crtc_disable_planes+0x48/0x140 [i915]
  [  396.209255]  [<ffffffffc06fe7cf>] haswell_crtc_disable+0x4f/0x3c0 [i915]
  [  396.209281]  [<ffffffffc06ff769>] __intel_set_mode+0xa59/0xc80 [i915]
  [  396.209309]  [<ffffffffc070633b>] intel_crtc_set_config+0xbfb/0xf70 [i915]
  [  396.209331]  [<ffffffffc05c9e36>] drm_mode_set_config_internal+0x66/0x100 [drm]
  [  396.209343]  [<ffffffffc0675d18>] restore_fbdev_mode+0xc8/0xf0 [drm_kms_helper]
  [  396.209354]  [<ffffffffc0677d89>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper]
  [  396.209365]  [<ffffffffc0677e02>] drm_fb_helper_set_par+0x22/0x50 [drm_kms_helper]
  [  396.209391]  [<ffffffffc071229a>] intel_fbdev_set_par+0x1a/0x60 [i915]
  [  396.209395]  [<ffffffff814339da>] fb_set_var+0x18a/0x410
  [  396.209426]  [<ffffffffc03e6aad>] ? btrfs_get_token_32+0x5d/0x120 [btrfs]
  [  396.209430]  [<ffffffff8142a409>] fbcon_blank+0x229/0x300
  [  396.209456]  [<ffffffffc03f12a3>] ? free_extent_buffer+0x53/0xb0 [btrfs]
  [  396.209461]  [<ffffffff814ba03a>] do_unblank_screen+0xba/0x1f0
  [  396.209467]  [<ffffffff814b0faa>] vt_ioctl+0x13ea/0x1460
  [  396.209472]  [<ffffffff814a2df1>] tty_ioctl+0x411/0xcb0
  [  396.209477]  [<ffffffff8119cf21>] ? kzfree+0x31/0x40
  [  396.209482]  [<ffffffff811d476e>] ? kfree+0x13e/0x150
  [  396.209485]  [<ffffffff8120b4ca>] ? dput+0x2a/0x1c0
  [  396.209488]  [<ffffffff81207b40>] do_vfs_ioctl+0x2e0/0x4e0
  [  396.209492]  [<ffffffff811f514e>] ? ____fput+0xe/0x10
  [  396.209496]  [<ffffffff81092d0c>] ? task_work_run+0xbc/0xf0
  [  396.209498]  [<ffffffff81207dc1>] SyS_ioctl+0x81/0xa0
  [  396.209503]  [<ffffffff817c934d>] system_call_fastpath+0x16/0x1b
  [  396.209504] ---[ end trace fe3c0fa6d5597c72 ]---

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