[Bug 90398] [BDW Regression]ARNING: CPU: 0 PID: 1215 at drivers/gpu/drm/drm_irq.c:1159 drm_wait_one_vblank+0x3b/0x16d [drm] while clean boot system

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90398

--- Comment #2 from Carl Michal <michal at physics.ubc.ca> ---
I see the same thing on an Dell XPS 13 (9343) with 4.2rc4:


[    1.669648] ------------[ cut here ]------------
[    1.669659] WARNING: CPU: 1 PID: 54 at drivers/gpu/drm/drm_irq.c:1162
drm_wait_one_vblank+0x16e/0x1c0 [drm]()
[    1.669660] vblank not available on crtc 0, ret=-22
[    1.669692] Modules linked in: pcspkr evdev input_leds mac_hid serio_raw
i2c_i801 lpc_ich rtsx_pci_ms memstick shpchp mei_me mei btusb btrtl btb
cm btintel bluetooth rfkill dell_led i915 snd_hda_codec_realtek
snd_hda_codec_generic drm_kms_helper snd_hda_intel drm snd_hda_codec
snd_hda_core s
nd_hwdep intel_gtt i2c_algo_bit fan thermal wmi battery int3403_thermal
snd_soc_rt286 snd_soc_rl6347a snd_soc_core snd_compress snd_pcm_dmaengine s
nd_pcm snd_timer snd i2c_hid(+) soundcore hid int3400_thermal video
i2c_designware_platform dw_dmac i2c_designware_core dw_dmac_core snd_soc_sst_ac
pi processor_thermal_device gpio_lynxpoint 8250_dw intel_soc_dts_iosf tpm_crb
i2c_core int3402_thermal spi_pxa2xx_platform int340x_thermal_zone tpm
 iosf_mbi acpi_thermal_rel acpi_pad ac button processor sch_fq_codel ip_tables
[    1.669703]  x_tables ext4 crc16 mbcache jbd2 sd_mod rtsx_pci_sdmmc atkbd
libps2 ahci libahci libata scsi_mod xhci_pci ehci_pci ehci_hcd xhci_hc
d rtsx_pci usbcore usb_common i8042 serio sdhci_acpi sdhci led_class mmc_core
[    1.669706] CPU: 1 PID: 54 Comm: kworker/u8:1 Not tainted 4.2.0-rc4-mainline
#1
[    1.669707] Hardware name: Dell Inc. XPS 13 9343/0TRX4F, BIOS A04 05/15/2015
[    1.669712] Workqueue: events_unbound async_run_entry_fn
[    1.669714]  0000000000000000 0000000056d893f3 ffff8800d9bd76e8
ffffffff81565fb9
[    1.669716]  0000000000000000 ffff8800d9bd7740 ffff8800d9bd7728
ffffffff810737a6
[    1.669718]  0000000100000000 ffff8800d90de800 ffff8800d90de800
0000000000000000
[    1.669719] Call Trace:
[    1.669724]  [<ffffffff81565fb9>] dump_stack+0x4c/0x6e
[    1.669726]  [<ffffffff810737a6>] warn_slowpath_common+0x86/0xc0
[    1.669729]  [<ffffffff81073835>] warn_slowpath_fmt+0x55/0x70
[    1.669735]  [<ffffffffa04643fe>] drm_wait_one_vblank+0x16e/0x1c0 [drm]
[    1.669766]  [<ffffffffa05a5cc2>] intel_finish_crtc_commit+0x162/0x170
[i915]
[    1.669770]  [<ffffffffa04df1c0>]
drm_atomic_helper_commit_planes+0x170/0x200 [drm_kms_helper]
[    1.669796]  [<ffffffffa05a6eed>] __intel_set_mode+0x8ad/0xb80 [i915]
[    1.669821]  [<ffffffffa05addb9>] intel_crtc_set_config+0x2c9/0x600 [i915]
[    1.669828]  [<ffffffffa046c9f6>] drm_mode_set_config_internal+0x66/0x100
[drm]
[    1.669832]  [<ffffffffa04e24f2>] restore_fbdev_mode+0xc2/0xf0
[drm_kms_helper]
[    1.669835]  [<ffffffffa04e4459>]
drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x70 [drm_kms_helper]
[    1.669837]  [<ffffffffa04e44c2>] drm_fb_helper_set_par+0x22/0x40
[drm_kms_helper]
[    1.669860]  [<ffffffffa05bc63a>] intel_fbdev_set_par+0x1a/0x60 [i915]
[    1.669863]  [<ffffffff8131c6e8>] fbcon_init+0x538/0x5c0
[    1.669866]  [<ffffffff81395aee>] visual_init+0xce/0x130
[    1.669868]  [<ffffffff8139761e>] do_bind_con_driver+0x1be/0x3e0
[    1.669870]  [<ffffffff81397b79>] do_take_over_console+0x149/0x1a0
[    1.669873]  [<ffffffff8156515e>] ? printk+0x55/0x6b
[    1.669875]  [<ffffffff8131c7c7>] do_fbcon_takeover+0x57/0xb0
[    1.669876]  [<ffffffff81320980>] fbcon_event_notify+0x660/0x760
[    1.669878]  [<ffffffff810920de>] notifier_call_chain+0x4e/0x80
[    1.669880]  [<ffffffff8109249b>] __blocking_notifier_call_chain+0x4b/0x70
[    1.669881]  [<ffffffff810924d6>] blocking_notifier_call_chain+0x16/0x20
[    1.669884]  [<ffffffff8132677b>] fb_notifier_call_chain+0x1b/0x20
[    1.669885]  [<ffffffff81328975>] register_framebuffer+0x215/0x350
[    1.669889]  [<ffffffffa04e473f>] drm_fb_helper_initial_config+0x25f/0xb20
[drm_kms_helper]
[    1.669908]  [<ffffffffa05bd0eb>] intel_fbdev_initial_config+0x1b/0x20
[i915]
[    1.669910]  [<ffffffff81093c1c>] async_run_entry_fn+0x4c/0x160
[    1.669912]  [<ffffffff8108b49b>] process_one_work+0x14b/0x440
[    1.669914]  [<ffffffff8108b7d8>] worker_thread+0x48/0x4a0
[    1.669917]  [<ffffffff8108b790>] ? process_one_work+0x440/0x440
[    1.669919]  [<ffffffff81091378>] kthread+0xd8/0xf0
[    1.669921]  [<ffffffff810912a0>] ? kthread_worker_fn+0x170/0x170
[    1.669923]  [<ffffffff8156b89f>] ret_from_fork+0x3f/0x70
[    1.669925]  [<ffffffff810912a0>] ? kthread_worker_fn+0x170/0x170
[    1.669926] ---[ end trace 69072b58e579403f ]---

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