Comment 11 for bug 1580272

Using kernel 4.4.0-24.43, had same error with #10:

Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899763] ------------[ cut here ]------------
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899808] WARNING: CPU: 6 PID: 959 at /build/linux-oXTOqc/linux-4.4.0/ubuntu/i915/intel_pm.c:3586 skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]()
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899812] WARN_ON(!wm_changed)
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899814] Modules linked in: rfcomm bnep snd_hda_codec_hdmi dell_led snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm intel_rapl x86_pkg_temp_thermal intel_powerclamp i2c_designware_platform coretemp dell_wmi i2c_designware_core snd_seq_midi sparse_keymap nls_iso8859_1 snd_seq_midi_event kvm_intel dell_laptop kvm dcdbas irqbypass crct10dif_pclmul crc32_pclmul snd_rawmidi aesni_intel uvcvideo aes_x86_64 videobuf2_vmalloc lrw videobuf2_memops gf128mul glue_helper videobuf2_v4l2 ablk_helper videobuf2_core cryptd v4l2_common snd_seq videodev brcmfmac btusb btrtl joydev snd_seq_device media brcmutil input_leds snd_timer hid_multitouch cfg80211 serio_raw snd soundcore rtsx_pci_ms memstick mei_me mei idma64 virt_dma processor_thermal_device intel_lpss_pci intel_soc_dts_iosf shpchp hci_uart btbcm btqca btintel bluetooth int3402_thermal int3403_thermal int340x_thermal_zone dell_smo8800 intel_lpss_acpi intel_lpss acpi_als int3400_thermal mac_hid acpi_thermal_rel kfifo_buf acpi_pad industrialio parport_pc ppdev lp parport autofs4 usbhid rtsx_pci_sdmmc nouveau i915_bpo mxm_wmi intel_ips ttm i2c_algo_bit drm_kms_helper syscopyarea psmouse sysfillrect sysimgblt fb_sys_fops drm nvme rtsx_pci ahci libahci i2c_hid hid wmi pinctrl_sunrisepoint video pinctrl_intel fjes
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899941] CPU: 6 PID: 959 Comm: Xorg Tainted: G W 4.4.0-24-generic #43-Ubuntu
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899944] Hardware name: Dell Inc. XPS 15 9550/0N7TVV, BIOS 01.02.00 04/07/2016
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899947] 0000000000000286 000000006ac654bb ffff8804a418f9a8 ffffffff813eab23
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899953] ffff8804a418f9f0 ffffffffc02d4c98 ffff8804a418f9e0 ffffffff810810d2
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899957] ffff8804a4401000 ffff8804a3b19d9c ffff8804a4400000 ffff8804a4b76378
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899962] Call Trace:
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899972] [<ffffffff813eab23>] dump_stack+0x63/0x90
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899979] [<ffffffff810810d2>] warn_slowpath_common+0x82/0xc0
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.899984] [<ffffffff8108116c>] warn_slowpath_fmt+0x5c/0x80
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900017] [<ffffffffc020667c>] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900049] [<ffffffffc0206816>] skl_update_wm+0x186/0x5f0 [i915_bpo]
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900080] [<ffffffffc020a53e>] intel_update_watermarks+0x1e/0x30 [i915_bpo]
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900128] [<ffffffffc0272d65>] intel_atomic_commit+0x485/0xdc0 [i915_bpo]
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900164] [<ffffffffc00cf7be>] ? drm_atomic_check_only+0x18e/0x590 [drm]
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900192] [<ffffffffc00cfbf7>] drm_atomic_commit+0x37/0x60 [drm]
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900208] [<ffffffffc0175b16>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper]
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900237] [<ffffffffc00ce49a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm]
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900264] [<ffffffffc00bee32>] drm_mode_set_config_internal+0x62/0x100 [drm]
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900291] [<ffffffffc00c3352>] drm_mode_setcrtc+0x3d2/0x4f0 [drm]
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900311] [<ffffffffc00b4742>] drm_ioctl+0x152/0x540 [drm]
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900334] [<ffffffffc00c2f80>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900341] [<ffffffff8122d5a4>] ? mntput+0x24/0x40
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900346] [<ffffffff8122062f>] do_vfs_ioctl+0x29f/0x490
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900360] [<ffffffff8120ebbe>] ? ____fput+0xe/0x10
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900366] [<ffffffff8109eac8>] ? task_work_run+0x78/0x90
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900370] [<ffffffff81220899>] SyS_ioctl+0x79/0x90
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900378] [<ffffffff81825bf2>] entry_SYSCALL_64_fastpath+0x16/0x71
Jun 13 03:00:02 u-XPS-15-9550 kernel: [ 143.900382] ---[ end trace b6141b33093cb54f ]---