[Bug 105428] New: Kernel 4.14.20, i915: pipe B vblank wait timed out

Sat Mar 10 17:38:35 UTC 2018

https://bugs.freedesktop.org/show_bug.cgi?id=105428

            Bug ID: 105428
           Summary: Kernel 4.14.20, i915: pipe B vblank wait timed out
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: peter.klotz99 at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Errors of this kind occur sporadically when using Arch Linux LTS kernels >=
4.14.20:

[77056.280048] pipe B vblank wait timed out
[77056.280074] ------------[ cut here ]------------
[77056.280142] WARNING: CPU: 1 PID: 55132 at
drivers/gpu/drm/i915/intel_display.c:12202 intel_atomic_commit_tail+0xed8/0xee0
[i915]
[77056.280143] Modules linked in: tun iTCO_wdt iTCO_vendor_support coretemp
kvm_intel i915 kvm arc4 irqbypass iwldvm mac80211 uvcvideo videobuf2_vmalloc
videobuf2_memops videobuf2_v4l2 videobuf2_core psmouse videodev pcspkr media
btusb btrtl iwlwifi btbcm btintel bluetooth joydev mousedev evdev input_leds
mac_hid ecdh_generic snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core i2c_algo_bit
cfg80211 snd_hwdep r592 drm_kms_helper snd_pcm memstick lpc_ich drm snd_timer
snd r8169 thermal mii soundcore syscopyarea intel_agp sysfillrect sysimgblt
shpchp fb_sys_fops intel_gtt agpgart asus_laptop acpi_cpufreq sparse_keymap ac
rfkill battery input_polldev video button sch_fq_codel vboxnetadp(O) pci_stub
vboxpci(O) fuse vboxnetflt(O) vboxdrv(O) loop sg crypto_user
[77056.280200]  ip_tables x_tables ext4 crc16 mbcache jbd2 fscrypto dm_crypt
cbc algif_skcipher af_alg hid_cherry hid_generic usbhid hid dm_mod sr_mod cdrom
sd_mod serio_raw atkbd libps2 uhci_hcd ahci libahci libata scsi_mod sdhci_pci
sdhci led_class firewire_ohci mmc_core firewire_core crc_itu_t i8042 serio
ehci_pci ehci_hcd usbcore usb_common
[77056.280231] CPU: 1 PID: 55132 Comm: kworker/u4:3 Tainted: G        W  O   
4.14.24-1-lts #1
[77056.280232] Hardware name: ASUSTeK Computer Inc.         B50A               
/B50A      , BIOS 212     10/09/2009
[77056.280263] Workqueue: events_unbound intel_atomic_commit_work [i915]
[77056.280265] task: ffff9ebad92cea00 task.stack: ffffb01804904000
[77056.280294] RIP: 0010:intel_atomic_commit_tail+0xed8/0xee0 [i915]
[77056.280296] RSP: 0018:ffffb01804907de0 EFLAGS: 00010282
[77056.280297] RAX: 000000000000001c RBX: 0000000000000001 RCX:
0000000000000000
[77056.280299] RDX: 0000000000000000 RSI: ffff9ebbffd16598 RDI:
ffff9ebbffd16598
[77056.280300] RBP: 00000000001f4b0a R08: 000000000001d2aa R09:
0000000000000004
[77056.280301] R10: ffffb01804907de0 R11: 0000000000000001 R12:
ffff9ebbfcf00000
[77056.280302] R13: ffff9ebbfbe38800 R14: 0000000000000002 R15:
0000000000000000
[77056.280304] FS:  0000000000000000(0000) GS:ffff9ebbffd00000(0000)
knlGS:0000000000000000
[77056.280305] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[77056.280307] CR2: 00007fe8722a6000 CR3: 000000023b00a000 CR4:
00000000000006e0
[77056.280308] Call Trace:
[77056.280317]  ? pick_next_task_fair+0x2ce/0x560
[77056.280320]  ? wait_woken+0x80/0x80
[77056.280324]  process_one_work+0x1da/0x3d0
[77056.280327]  worker_thread+0x2b/0x3f0
[77056.280329]  ? process_one_work+0x3d0/0x3d0
[77056.280332]  kthread+0x11a/0x130
[77056.280334]  ? kthread_create_on_node+0x70/0x70
[77056.280337]  ? SyS_exit+0x13/0x20
[77056.280341]  ret_from_fork+0x35/0x40
[77056.280343] Code: 24 88 01 00 00 48 8d 74 24 30 48 83 c7 08 e8 90 1f 4d c8
4d 85 ff 0f 85 da fa ff ff 8d 73 41 48 c7 c7 00 82 c8 c0 e8 c3 ca 4e c8 <0f> 0b
e9 c4 fa ff ff 90 66 66 66 66 90 41 57 41 56 41 55 41 54
[77056.280378] ---[ end trace 9bf5213050c0390c ]---

00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset
Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller])
        Subsystem: ASUSTeK Computer Inc. Mobile 4 Series Chipset Integrated
Graphics Controller
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Memory at fd000000 (64-bit, non-prefetchable) [size=4M]
        Memory at d0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at bc00 [size=8]
        [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
        Capabilities: [d0] Power Management version 3
        Kernel driver in use: i915
        Kernel modules: i915

Once this problem has happened the machine needs a reboot because it is in some
sort of "stutter" mode. All graphics operations are delayed. The problem seems
to occur more likely if the system is under load like doing some I/O operation
and watching a video in parallel. I currently have no scenario to reliably
reproduce it.

What I can definitely say is that kernels 4.14.16 up to 4.14.19 did not show
this error. Kernel 4.14.19 ran (according to my logs) for about a week without
problems. This should have been enough time for the problem to show up.

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