[Bug 98618] [skl] WARN_ON(!intel_pstate->base.fb) spam

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98618

Martin <adam.martin at email.cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|INVALID                     |---
             Status|CLOSED                      |REOPENED

--- Comment #6 from Martin <adam.martin at email.cz> ---
Hi all, 

I have a similar problem to Joel.

The system boots normally, the only problem is the screen remains black (the
backlight seems to be turned on). I have remote control of the machine via ssh:
I managed to start the sshd after logging in tty4 without having any visual
control of what I was doing.

The most important tracelogs can be found in dmesg and syslog and look similar
to this:
[    2.146215] ------------[ cut here ]------------
[    2.146253] WARNING: CPU: 2 PID: 254 at drivers/gpu/drm/i915/intel_pm.c:3749
skl_compute_wm+0xbf5/0x1550 [i915]
[    2.146253] WARN_ON(!intel_pstate->base.fb)
[    2.146254] Modules linked in: sparse_keymap mac80211 snd_soc_skl
snd_soc_skl_ipc snd_soc_sst_ipc iwlwifi snd_soc_sst_dsp snd_hda_ext_core
snd_soc_sst_mat
ch nls_iso8859_1 intel_rapl snd_soc_core x86_pkg_temp_thermal nls_cp437
intel_powerclamp coretemp snd_compress kvm_intel snd_pcm_dmaengine vfat
cfg80211 fat 
kvm irqbypass ac97_bus crct10dif_pclmul crc32_pclmul crc32c_intel
ghash_clmulni_intel i915 pcbc aesni_intel snd_hda_intel idma64 snd_hda_codec
uvcvideo aes_x
86_64 crypto_simd glue_helper cryptd videobuf2_vmalloc drm_kms_helper
intel_cstate videobuf2_memops videobuf2_v4l2 snd_hda_core intel_rapl_perf
videobuf2_cor
e snd_hwdep drm videodev snd_pcm media evdev snd_timer intel_gtt syscopyarea
snd mei_me sysfillrect input_leds sysimgblt mac_hid pcspkr fb_sys_fops
processor
_thermal_device soundcore
[    2.146275]  i2c_i801 mei i2c_algo_bit shpchp intel_pch_thermal
intel_soc_dts_iosf intel_lpss_pci i2c_hid thermal elan_i2c hid wmi
int3403_thermal hci_uar
t intel_lpss_acpi battery int3406_thermal int3402_thermal intel_lpss btqca
video int340x_thermal_zone ac tpm_crb int3400_thermal asus_wireless
acpi_thermal_r
el acpi_als led_class kfifo_buf button industrialio acpi_pad tpm_tis
tpm_tis_core tpm btusb btrtl btbcm btintel bluetooth rfkill sch_fq_codel sg
ip_tables x_
tables ext4 crc16 jbd2 fscrypto mbcache sd_mod serio_raw atkbd libps2 ahci
libahci xhci_pci libata xhci_hcd scsi_mod usbcore usb_common i8042 serio
[    2.146300] CPU: 2 PID: 254 Comm: kworker/u8:4 Not tainted 4.11.7-1-ARCH #1
[    2.146301] Hardware name: ASUSTeK COMPUTER INC. UX305UA/UX305UA, BIOS
UX305UA.201 10/12/2015
[    2.146305] Workqueue: events_unbound async_run_entry_fn
[    2.146306] Call Trace:
[    2.146310]  dump_stack+0x63/0x81
[    2.146312]  __warn+0xcb/0xf0
[    2.146314]  warn_slowpath_fmt+0x5a/0x80
[    2.146345]  skl_compute_wm+0xbf5/0x1550 [i915]
[    2.146379]  intel_atomic_check+0x5ac/0x11a0 [i915]
[    2.146386]  ? drm_mode_object_unreference+0x15/0x20 [drm]
[    2.146392]  drm_atomic_check_only+0x39e/0x580 [drm]
[    2.146397]  drm_atomic_commit+0x18/0x50 [drm]
[    2.146400]  restore_fbdev_mode+0x222/0x280 [drm_kms_helper]
[    2.146402]  drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x80
[drm_kms_helper]
[    2.146405]  drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper]
[    2.146435]  intel_fbdev_set_par+0x18/0x70 [i915]
[    2.146437]  fbcon_init+0x484/0x650
[    2.146440]  visual_init+0xd6/0x130
[    2.146441]  do_bind_con_driver+0x1fc/0x420
[    2.146443]  do_take_over_console+0x82/0x1b0
[    2.146445]  do_fbcon_takeover+0x5c/0xb0
[    2.146446]  fbcon_event_notify+0x587/0x780
[    2.146448]  notifier_call_chain+0x4a/0x70
[    2.146450]  blocking_notifier_call_chain+0x43/0x60
[    2.146452]  fb_notifier_call_chain+0x1b/0x20
[    2.146453]  register_framebuffer+0x24d/0x360
[    2.146455]  ? vga_switcheroo_client_fb_set+0x5b/0x70
[    2.146458]  drm_fb_helper_initial_config+0x230/0x3e0 [drm_kms_helper]
[    2.146487]  intel_fbdev_initial_config+0x18/0x30 [i915]
[    2.146489]  async_run_entry_fn+0x37/0x150
[    2.146491]  process_one_work+0x1e0/0x490
[    2.146493]  worker_thread+0x48/0x4e0
[    2.146494]  kthread+0x125/0x140
[    2.146495]  ? process_one_work+0x490/0x490
[    2.146497]  ? kthread_create_on_node+0x70/0x70
[    2.146499]  ret_from_fork+0x2c/0x40
[    2.146500] ---[ end trace b45da8c5dcb81a7f ]---
[    2.146501] ------------[ cut here ]------------

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