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[Bug 1488719] Re: dmesg shows "[drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!"

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I have been affected by this bug for a while as well.  This is my setup:

Dell E5450 with Ubuntu 14.04.04 LTS with kernel: 4.2.0-34-generic

The laptop is connected to a Dell E-Port Plus Advanced Port Replicator.

The port replicator is connected via two seperate DP -> mDP cables to
two monitors of model Dell  27" QHD U2715H.

I get the same annoying error in dmesg but that is the least of my
problems. I also get complete crashes where changing TTY is impossible.
The entire laptop will also at times reboot, even when not being used. I
also get the same problem others have reported where waking up the
laptop causes the second screen to go back into power-save mode. I used
to have screen flickering in Windows 10 Professional. But i have not
seen this behavior in Ubuntu.

I also get this suspicious error in /var/log/syslog

Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931613] ------------[ cut here ]------------
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931631] WARNING: CPU: 1 PID: 1367 at /build/linux-lts-wily-MVxxD8/linux-lts-wily-4.2.0/drivers/gpu/drm/i915/intel_ddi.c:756 intel_ddi_get_crtc_new_encoder+0x94/0xa0 [i915]()
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931632] 2 encoders on crtc for pipe A
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931633] Modules linked in: pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) cmac dm_crypt dell_wmi sparse_keymap dell_laptop dcdbas dell_smm_hwmon hid_logitech_hidpp uvcvideo intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp videobuf2_vmalloc videobuf2_memops kvm_intel snd_soc_rt5640 videobuf2_core btusb btrtl btbcm v4l2_common btintel kvm videodev snd_soc_rl6231 media crct10dif_pclmul snd_soc_core crc32_pclmul bnep rfcomm snd_compress arc4 ac97_bus snd_pcm_dmaengine bluetooth snd_seq_midi aesni_intel aes_x86_64 iwlmvm lrw gf128mul glue_helper ablk_helper cryptd mac80211 snd_seq_midi_event snd_rawmidi dell_led iwlwifi snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic joydev input_leds snd_hda_intel snd_hda_codec cfg80211 serio_raw snd_seq mei_me snd_hda_core snd_hwdep mei lpc_ich shpchp snd_pcm snd_seq_device snd_timer dw_dmac snd dw_dmac_core int3403_thermal 8250_fintek snd_soc_sst_acpi dell_smo8800 parport_pc soundcore 8250_dw ppdev i2c_hid int3400_thermal spi_pxa2xx_platform processor_thermal_device acpi_thermal_rel acpi_pad dell_rbtn i2c_designware_platform intel_soc_dts_iosf i2c_designware_core mac_hid int3402_thermal acpi_als int340x_thermal_zone lp parport kfifo_buf industrialio hid_logitech_dj hid_generic usbhid hid i915 psmouse i2c_algo_bit ahci drm_kms_helper e1000e libahci drm ptp sdhci_pci pps_core wmi sdhci_acpi video sdhci
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931682] CPU: 1 PID: 1367 Comm: Xorg Tainted: G           OE   4.2.0-34-generic #39~14.04.1-Ubuntu
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931683] Hardware name: Dell Inc. Latitude E5450/09X6YN, BIOS A10 09/01/2015
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931684]  ffffffffc026b130 ffff8804085eb9c8 ffffffff817b5fed 0000000000000000
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931686]  ffff8804085eba18 ffff8804085eba08 ffffffff8107799a 0000000100020101
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931687]  ffff8800d5272500 ffff88040698a800 ffff880406c86f00 ffff8804061c8f78
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931688] Call Trace:
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931692]  [<ffffffff817b5fed>] dump_stack+0x45/0x57
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931695]  [<ffffffff8107799a>] warn_slowpath_common+0x8a/0xc0
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931697]  [<ffffffff81077a16>] warn_slowpath_fmt+0x46/0x50
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931709]  [<ffffffffc0221ce4>] intel_ddi_get_crtc_new_encoder+0x94/0xa0 [i915]
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931721]  [<ffffffffc02222e5>] intel_ddi_pll_select+0x35/0xfe0 [i915]
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931732]  [<ffffffffc020c63b>] ? intel_check_primary_plane+0xdb/0x330 [i915]
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931734]  [<ffffffff811d0901>] ? __kmalloc_track_caller+0x1a1/0x250
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931745]  [<ffffffffc020491a>] ? __intel_set_mode+0x11a/0xb10 [i915]
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931755]  [<ffffffffc01f5c46>] haswell_crtc_compute_clock+0x16/0x40 [i915]
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931765]  [<ffffffffc0204d9b>] __intel_set_mode+0x59b/0xb10 [i915]
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931775]  [<ffffffffc0206592>] ? intel_modeset_compute_config+0x362/0xb60 [i915]
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931785]  [<ffffffffc020be16>] intel_crtc_set_config+0x366/0x5a0 [i915]
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931794]  [<ffffffffc0063428>] drm_mode_set_config_internal+0x68/0x100 [drm]
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931801]  [<ffffffffc006734d>] drm_mode_setcrtc+0xdd/0x4f0 [drm]
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931806]  [<ffffffffc0058733>] drm_ioctl+0x363/0x680 [drm]
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931812]  [<ffffffffc0067270>] ? drm_mode_setplane+0x1c0/0x1c0 [drm]
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931815]  [<ffffffff811fe2bd>] do_vfs_ioctl+0x2cd/0x4b0
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931817]  [<ffffffff811edaf5>] ? __sb_end_write+0x35/0x70
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931818]  [<ffffffff811eb7ec>] ? vfs_write+0x15c/0x190
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931820]  [<ffffffff811fe519>] SyS_ioctl+0x79/0x90
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931821]  [<ffffffff81200465>] ? SyS_poll+0x65/0xf0
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931823]  [<ffffffff817bd3f2>] entry_SYSCALL_64_fastpath+0x16/0x75
Apr 12 08:53:43 SIKR-E5450 kernel: [    5.931824] ---[ end trace 80cd1a97a7e511d3 ]---

If i can help in any way, please notifiy me.

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https://bugs.launchpad.net/bugs/1488719

Title:
  dmesg shows "[drm:gen8_irq_handler [i915]] *ERROR* The master control
  interrupt lied (SDE)!"

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  On a recent intel NUC using i915 graphics, I get the following errors
  in dmesg:

  [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt
  lied (SDE)!

  There are two monitors connected to this box, one with mini-
  HDMI->HDMI, one with mini-DP->HDMI cable.

  Maybe related:

  https://bugs.freedesktop.org/show_bug.cgi?id=80896

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-generic 3.19.0.26.25
  ProcVersionSignature: Ubuntu 3.19.0-26.28-generic 3.19.8-ckt4
  Uname: Linux 3.19.0-26-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.3
  Architecture: amd64
  Date: Wed Aug 26 10:07:31 2015
  InstallationDate: Installed on 2015-08-01 (24 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-26-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)

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References

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