When the notebook (HP HP ProBook 430 G3, with Intel® Core™ i5-6200U / Intel HD Graphics 520) starting with an external monitor, in kernel module error occurs: [ 6.668591] ------------[ cut here ]------------ [ 6.668679] WARNING: CPU: 0 PID: 63 at drivers/gpu/drm/i915/intel_pm.c:3586 skl_update_other_pipe_wm+0x177/0x180 [i915] [ 6.668682] WARN_ON(!wm_changed) [ 6.668741] Modules linked in: snd_soc_skl snd_soc_skl_ipc snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_ext_core snd_soc_sst_match snd_soc_core snd_compress snd_pcm_dmaengine ac97_bus hp_wmi sparse_keymap arc4 intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul iwlmvm glue_helper ablk_helper cryptd mac80211 snd_hda_intel pcspkr snd_hda_codec psmouse snd_hda_core serio_raw snd_hwdep snd_pcm iwlwifi r8169 snd_timer snd soundcore i2c_i801 mii rtsx_pci_ms cfg80211 memstick i915 shpchp btusb btrtl btbcm btintel bluetooth uvcvideo drm_kms_helper joydev videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 mousedev videobuf2_core drm evdev videodev input_leds mac_hid rfkill intel_gtt media [ 6.668781] syscopyarea sysfillrect sysimgblt fb_sys_fops mei_me i2c_algo_bit mei intel_pch_thermal tpm_infineon thermal wmi battery hp_accel button led_class video lis3lv02d input_polldev fjes tpm_tis hp_wireless tpm ac acpi_pad processor sch_fq_codel ip_tables x_tables ext4 crc16 jbd2 mbcache sd_mod hid_generic usbhid hid rtsx_pci_sdmmc mmc_core atkbd libps2 ahci libahci xhci_pci libata xhci_hcd rtsx_pci scsi_mod usbcore usb_common i8042 serio [ 6.668786] CPU: 0 PID: 63 Comm: kworker/u16:1 Not tainted 4.6.2-1-ARCH #1 [ 6.668788] Hardware name: HP HP ProBook 430 G3/80FF, BIOS N78 Ver. 01.08 02/23/2016 [ 6.668795] Workqueue: events_unbound async_run_entry_fn [ 6.668801] 0000000000000286 00000000f0df396d ffff88014a92b668 ffffffff812e5492 [ 6.668805] ffff88014a92b6b8 0000000000000000 ffff88014a92b6a8 ffffffff8107a6bb [ 6.668809] 00000e0200000063 ffff880085eb2000 ffff88014a92b734 ffff880085f29da4 [ 6.668810] Call Trace: [ 6.668819] [<ffffffff812e5492>] dump_stack+0x63/0x81 [ 6.668824] [<ffffffff8107a6bb>] __warn+0xcb/0xf0 [ 6.668827] [<ffffffff8107a73f>] warn_slowpath_fmt+0x5f/0x80 [ 6.668897] [<ffffffffa05b7707>] skl_update_other_pipe_wm+0x177/0x180 [i915] [ 6.668958] [<ffffffffa05b7894>] skl_update_wm+0x184/0x620 [i915] [ 6.669050] [<ffffffffa0646cbf>] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915] [ 6.669116] [<ffffffffa05bb43e>] intel_update_watermarks+0x1e/0x30 [i915] [ 6.669206] [<ffffffffa0629dc2>] haswell_crtc_enable+0x322/0x8b0 [i915] [ 6.669289] [<ffffffffa0616e7e>] ? intel_finish_crtc_commit+0xe/0x10 [i915] [ 6.669300] [<ffffffffa0447025>] ? drm_atomic_helper_commit_planes_on_crtc+0x155/0x260 [drm_kms_helper] [ 6.669376] [<ffffffffa0625931>] intel_atomic_commit+0x5f1/0x15f0 [i915] [ 6.669391] [<ffffffffa03d8ab2>] ? drm_atomic_check_only+0x182/0x600 [drm] [ 6.669404] [<ffffffffa03d8f67>] drm_atomic_commit+0x37/0x60 [drm] [ 6.669412] [<ffffffffa044ae28>] restore_fbdev_mode+0x238/0x260 [drm_kms_helper] [ 6.669420] [<ffffffffa044d1d4>] drm_fb_helper_restore_fbdev_mode_unlocked+0x34/0x80 [drm_kms_helper] [ 6.669427] [<ffffffffa044d24d>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper] [ 6.669509] [<ffffffffa063d09a>] intel_fbdev_set_par+0x1a/0x60 [i915] [ 6.669514] [<ffffffff813527fc>] fbcon_init+0x56c/0x5f0 [ 6.669518] [<ffffffff813d2a0a>] visual_init+0xca/0x130 [ 6.669523] [<ffffffff813d449a>] do_bind_con_driver+0x1da/0x3c0 [ 6.669528] [<ffffffff813d49f7>] do_take_over_console+0x157/0x1c0 [ 6.669532] [<ffffffff813528dc>] do_fbcon_takeover+0x5c/0xb0 [ 6.669537] [<ffffffff81356b3d>] fbcon_event_notify+0x69d/0x7a0 [ 6.669543] [<ffffffff8109a74a>] notifier_call_chain+0x4a/0x70 [ 6.669550] [<ffffffff8109aaf7>] __blocking_notifier_call_chain+0x47/0x60 [ 6.669556] [<ffffffff8109ab26>] blocking_notifier_call_chain+0x16/0x20 [ 6.669561] [<ffffffff8135ca4b>] fb_notifier_call_chain+0x1b/0x20 [ 6.669566] [<ffffffff8135ea16>] register_framebuffer+0x216/0x360 [ 6.669575] [<ffffffffa044d4fe>] drm_fb_helper_initial_config+0x28e/0x430 [drm_kms_helper] [ 6.669646] [<ffffffffa063dc8f>] intel_fbdev_initial_config+0x1f/0x30 [i915] [ 6.669650] [<ffffffff8109c1b8>] async_run_entry_fn+0x48/0x150 [ 6.669654] [<ffffffff81093a05>] process_one_work+0x1e5/0x480 [ 6.669658] [<ffffffff81093ce8>] worker_thread+0x48/0x4e0 [ 6.669662] [<ffffffff81093ca0>] ? process_one_work+0x480/0x480 [ 6.669665] [<ffffffff81093ca0>] ? process_one_work+0x480/0x480 [ 6.669670] [<ffffffff81099998>] kthread+0xd8/0xf0 [ 6.669677] [<ffffffff815c7482>] ret_from_fork+0x22/0x40 [ 6.669683] [<ffffffff810998c0>] ? kthread_worker_fn+0x170/0x170 [ 6.669695] ---[ end trace 20cb4d67bd1f50c9 ]--- If the notebook is switched on without an external monitor , the error does not occur. Disrto: Archlinux Kernel: Linux localhost 4.6.2-1-ARCH #1 SMP PREEMPT Wed Jun 8 08:40:59 CEST 2016 x86_64 GNU/Linux Intel drivers: 1:2.99.917+662+gb617f80-1
Interface: HDMI1
Intel graphics bugs are tracked at https://bugs.freedesktop.org/. This one is likely a dupe of https://bugs.freedesktop.org/show_bug.cgi?id=89055 If the problem persists in drm-intel-nightly, please file a new bug at fdo.