Comment 20 for bug 1567417

I believe this is the same issue with Ubuntu 16.04/Mint 18.1 on a Dell Precision 5510 laptop. This shows up constantly in the kernel logs (kernel 4.4.0-51-generic)

[ 15.021294] ------------[ cut here ]------------
[ 15.021309] WARNING: CPU: 0 PID: 1564 at /build/linux-j9zxaP/linux-4.4.0/ubuntu/i915/intel_pm.c:3675 skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]()
[ 15.021310] WARN_ON(!wm_changed)
[ 15.021311] Modules linked in:
[ 15.021312] ctr ccm pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) bbswitch(OE) vboxdrv(OE) bnep binfmt_misc nls_iso8859_1 nvidia_uvm(POE) i2c_designware_platform i2c_designware_core snd_hda_codec_hdmi arc4 dell_wmi mxm_wmi dell_led snd_hda_codec_realtek snd_hda_codec_generic dell_rbtn dell_laptop dcdbas dell_smm_hwmon uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 nvidia_drm(POE) nvidia_modeset(POE) videobuf2_core hid_multitouch v4l2_common snd_hda_intel videodev btusb snd_hda_codec btrtl media snd_hda_core snd_hwdep nvidia(POE) snd_pcm iwlmvm snd_seq_midi snd_seq_midi_event snd_rawmidi mac80211 intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm snd_seq iwlwifi irqbypass snd_seq_device snd_timer joydev input_leds serio_raw cfg80211 snd soundcore rtsx_pci_ms
[ 15.021333] memstick mei_me idma64 mei virt_dma intel_lpss_pci processor_thermal_device ie31200_edac intel_soc_dts_iosf edac_core shpchp hci_uart btbcm btqca btintel bluetooth int3403_thermal wmi intel_lpss_acpi dell_smo8800 intel_lpss int3402_thermal int340x_thermal_zone int3400_thermal acpi_thermal_rel intel_hid acpi_als acpi_pad sparse_keymap mac_hid kfifo_buf industrialio parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq drbg ansi_cprng algif_skcipher af_alg dm_crypt dm_mirror dm_region_hash dm_log hid_logitech_hidpp hid_logitech_dj usbhid rtsx_pci_sdmmc crct10dif_pclmul i915_bpo crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd intel_ips i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect sysimgblt fb_sys_fops drm ahci nvme rtsx_pci
[ 15.021354] libahci i2c_hid hid pinctrl_sunrisepoint video pinctrl_intel fjes
[ 15.021358] CPU: 0 PID: 1564 Comm: Xorg Tainted: P W OE 4.4.0-51-generic #72-Ubuntu
[ 15.021358] Hardware name: Dell Inc. Precision 5510/08R8KJ, BIOS 1.2.14 08/31/2016
[ 15.021359] 0000000000000286 00000000ed8db547 ffff88089351f920 ffffffff813f5fc3
[ 15.021361] ffff88089351f968 ffffffffc03999a0 ffff88089351f958 ffffffff810812b2
[ 15.021362] ffff88089162b000 ffff8808908fa148 ffff88089162a000 ffff88089101a378
[ 15.021363] Call Trace:
[ 15.021366] [<ffffffff813f5fc3>] dump_stack+0x63/0x90
[ 15.021369] [<ffffffff810812b2>] warn_slowpath_common+0x82/0xc0
[ 15.021370] [<ffffffff8108134c>] warn_slowpath_fmt+0x5c/0x80
[ 15.021378] [<ffffffffc02bafec>] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]
[ 15.021386] [<ffffffffc02bb185>] skl_update_wm+0x185/0x610 [i915_bpo]
[ 15.021398] [<ffffffffc034c3af>] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915_bpo]
[ 15.021406] [<ffffffffc02bef0e>] intel_update_watermarks+0x1e/0x30 [i915_bpo]
[ 15.021418] [<ffffffffc032e681>] haswell_crtc_enable+0x761/0x8e0 [i915_bpo]
[ 15.021430] [<ffffffffc032a586>] intel_atomic_commit+0x5d6/0x14a0 [i915_bpo]
[ 15.021440] [<ffffffffc00d3bde>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[ 15.021447] [<ffffffffc00d4017>] drm_atomic_commit+0x37/0x60 [drm]
[ 15.021452] [<ffffffffc016fdb6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper]
[ 15.021458] [<ffffffffc00c2e42>] drm_mode_set_config_internal+0x62/0x100 [drm]
[ 15.021465] [<ffffffffc00c749c>] drm_mode_setcrtc+0x3cc/0x4f0 [drm]
[ 15.021470] [<ffffffffc00b8752>] drm_ioctl+0x152/0x540 [drm]
[ 15.021476] [<ffffffffc00c70d0>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
[ 15.021478] [<ffffffff8122166f>] do_vfs_ioctl+0x29f/0x490
[ 15.021480] [<ffffffff8108e521>] ? __set_task_blocked+0x41/0xa0
[ 15.021481] [<ffffffff81090eb6>] ? __set_current_blocked+0x36/0x60
[ 15.021482] [<ffffffff812218d9>] SyS_ioctl+0x79/0x90
[ 15.021483] [<ffffffff81091154>] ? SyS_rt_sigprocmask+0x74/0xc0
[ 15.021485] [<ffffffff81836032>] entry_SYSCALL_64_fastpath+0x16/0x71
[ 15.021486] ---[ end trace f3f8c1347bdf40a5 ]---