[Bug 89108] drm_wait_one_vblank warnings

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89108

oliver.pahl at googlemail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #14 from oliver.pahl at googlemail.com ---
I experience the same issue on kernel 4.2-rc6. Before that I needed to boot
with the i915.preliminary_hw_support=1 i915.enable_ips=0 kerne parameters,
otherwise switching VTs was broken. Now switching works but I get the vblank
issue and graphical artifacts. If you need more info or think this is a
different bug, please state it so I can open another one. Also contact me if
you need more info.


[    1.546774] ------------[ cut here ]------------
[    1.546794] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_irq.c:1162
drm_wait_one_vblank+0x16e/0x1c0 [drm]()
[    1.546795] vblank not available on crtc 0, ret=-22
[    1.546844] Modules linked in: msr arc4 bnep bluetooth snd_hda_codec_hdmi
iTCO_wdt iTCO_vendor_support intel_rapl iwlmvm iosf_mbi mac80211 nls_iso8859_1
intel_powerclamp coretemp kvm_intel nls_cp437 kvm vfat fat crct10dif_pclmul
evdev crc32_pclmul input_leds mac_hid crc32c_intel psmouse serio_raw iwlwifi
ghash_clmulni_intel aesni_intel aes_x86_64 lrw snd_hda_codec_conexant gf128mul
glue_helper ablk_helper snd_hda_codec_generic cryptd i915 snd_hda_intel
rtsx_pci_ms thinkpad_acpi snd_hda_codec memstick snd_hda_core nvram wmi
led_class tpm_tis drm_kms_helper battery tpm cfg80211 acpi_pad drm ac snd_hwdep
video mei_me rfkill intel_gtt snd_pcm i2c_algo_bit i2c_i801 snd_timer button
mei snd lpc_ich soundcore i2c_core shpchp processor sch_fq_codel ip_tables
x_tables ext4 crc16 mbcache jbd2 sd_mod rtsx_pci_sdmmc
[    1.546852]  mmc_core atkbd libps2 ahci libahci xhci_pci ehci_pci libata
xhci_hcd ehci_hcd usbcore scsi_mod rtsx_pci usb_common i8042 serio
[    1.546854] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G     U         
4.2.0-rc6-ARCH #1
[    1.546855] Hardware name: LENOVO 20DL0029GE/20DL0029GE, BIOS JEET65WW (1.14
) 05/30/2015
[    1.546860] Workqueue: events_unbound async_run_entry_fn
[    1.546863]  0000000000000000 0000000089ad6b61 ffff8802252cb6e8
ffffffff81559be2
[    1.546865]  0000000000000000 ffff8802252cb740 ffff8802252cb728
ffffffff81073786
[    1.546867]  0000000100000000 ffff880223cab800 ffff880223cab800
0000000000000000
[    1.546867] Call Trace:
[    1.546872]  [<ffffffff81559be2>] dump_stack+0x4c/0x6e
[    1.546875]  [<ffffffff81073786>] warn_slowpath_common+0x86/0xc0
[    1.546877]  [<ffffffff81073815>] warn_slowpath_fmt+0x55/0x70
[    1.546883]  [<ffffffffa031e3fe>] drm_wait_one_vblank+0x16e/0x1c0 [drm]
[    1.546916]  [<ffffffffa054ed82>] intel_finish_crtc_commit+0x162/0x170
[i915]
[    1.546920]  [<ffffffffa04341a0>]
drm_atomic_helper_commit_planes+0x170/0x200 [drm_kms_helper]
[    1.546946]  [<ffffffffa054ffad>] __intel_set_mode+0x8ad/0xb80 [i915]
[    1.546973]  [<ffffffffa0556e79>] intel_crtc_set_config+0x2c9/0x600 [i915]
[    1.546980]  [<ffffffffa03269f6>] drm_mode_set_config_internal+0x66/0x100
[drm]
[    1.546983]  [<ffffffffa0437522>] restore_fbdev_mode+0xc2/0xf0
[drm_kms_helper]
[    1.546987]  [<ffffffffa0439489>]
drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x70 [drm_kms_helper]
[    1.546989]  [<ffffffffa04394f2>] drm_fb_helper_set_par+0x22/0x40
[drm_kms_helper]
[    1.547016]  [<ffffffffa05656fa>] intel_fbdev_set_par+0x1a/0x60 [i915]
[    1.547019]  [<ffffffff8131c9e8>] fbcon_init+0x538/0x5c0
[    1.547022]  [<ffffffff81395f1e>] visual_init+0xce/0x130
[    1.547024]  [<ffffffff81397a4e>] do_bind_con_driver+0x1be/0x3e0
[    1.547027]  [<ffffffff81397fa9>] do_take_over_console+0x149/0x1a0
[    1.547029]  [<ffffffff81558d87>] ? printk+0x55/0x6b
[    1.547032]  [<ffffffff8131cac7>] do_fbcon_takeover+0x57/0xb0
[    1.547033]  [<ffffffff81320c80>] fbcon_event_notify+0x660/0x760
[    1.547036]  [<ffffffff810920fe>] notifier_call_chain+0x4e/0x80
[    1.547038]  [<ffffffff810924bb>] __blocking_notifier_call_chain+0x4b/0x70
[    1.547040]  [<ffffffff810924f6>] blocking_notifier_call_chain+0x16/0x20
[    1.547041]  [<ffffffff81326a7b>] fb_notifier_call_chain+0x1b/0x20
[    1.547043]  [<ffffffff81328c75>] register_framebuffer+0x215/0x350
[    1.547047]  [<ffffffffa043976f>] drm_fb_helper_initial_config+0x25f/0xaf0
[drm_kms_helper]
[    1.547071]  [<ffffffffa05661ab>] intel_fbdev_initial_config+0x1b/0x20
[i915]
[    1.547073]  [<ffffffff81093c3c>] async_run_entry_fn+0x4c/0x160
[    1.547076]  [<ffffffff8108b4bb>] process_one_work+0x14b/0x440
[    1.547088]  [<ffffffff8108b7f8>] worker_thread+0x48/0x4a0
[    1.547090]  [<ffffffff8108b7b0>] ? process_one_work+0x440/0x440
[    1.547092]  [<ffffffff81091458>] kthread+0xd8/0xf0
[    1.547094]  [<ffffffff81091380>] ? kthread_worker_fn+0x170/0x170
[    1.547097]  [<ffffffff8155f55f>] ret_from_fork+0x3f/0x70
[    1.547099]  [<ffffffff81091380>] ? kthread_worker_fn+0x170/0x170
[    1.547100] ---[ end trace 601e65f5cbcc5269 ]---

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