Bug 94884

Summary:

[SKL] *ERROR* CPU pipe A FIFO underrun

Product:

DRI

Reporter:

Thomas <schlaganfall.patient>

Component:

DRM/Intel

Assignee:

Intel GFX Bugs mailing list <intel-gfx-bugs>

Status:

CLOSED FIXED

QA Contact:

Intel GFX Bugs mailing list <intel-gfx-bugs>

Severity:

normal

Priority:

medium

CC:

dxtr, frdsktp, intel-gfx-bugs, _kossak_, michelelacchia

Version:

XOrg git

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

i915 platform:

SKL

i915 features:

display/atomic

Attachments:

Description	Flags
dmesg output with kernel parameters drm.debug=0x1e log_buf_len=4M	none
dmesg output	none

Description Thomas 2016-04-10 16:47:43 UTC

Created attachment 122851 [details]
dmesg output with kernel parameters drm.debug=0x1e log_buf_len=4M

got a new HP Envy notebook and see screen continous flashing after some seconds. Happens sometimes after 2sec, sometimes after 30s. Annoying

found dmesg entry
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

System is opensuse tumbleweed

uname -rm
4.5.0-3-default x86_64

attached dmesg output with drm.debug=0x1e

looks similar to Bug #94605

cat /sys/class/drm/card0/error
no error state collected

Comment 1 Christian Stadelmann 2016-06-10 15:13:48 UTC

Same here on a Clarkdale CPU.

This happens to me every time I switch from X.org to tty. Doesn't happen when running Wayland instead of X.

System: Fedora 24 Beta, also present with Fedora 23. Since at least 2 kernel versions.

Comment 2 Michele Lacchia 2016-06-24 09:29:54 UTC

I can confirm this as of Linux 4.6.2-1-ARCH. CPU is Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz.

Sometimes the bug causes my system to completely freeze and I have to reboot with the power button. In journal I see:

Jun 24 10:51:01 miki-laptop kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

but the worse one is:

Jun 24 10:30:34 miki-laptop kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Jun 24 10:39:25 miki-laptop kernel: BUG: unable to handle kernel NULL pointer dereference at           (null)
Jun 24 10:39:25 miki-laptop kernel: IP: [<          (null)>]           (null)
Jun 24 10:39:25 miki-laptop kernel: PGD 84d3e067 PUD 8523c067 PMD 0 
Jun 24 10:39:25 miki-laptop kernel: Oops: 0010 [#1] PREEMPT SMP 
Jun 24 10:39:25 miki-laptop kernel: Modules linked in: fuse sha256_ssse3 sha256_generic hmac drbg ansi_cprng ctr ccm uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core videodev
Jun 24 10:39:25 miki-laptop kernel:  glue_helper ablk_helper snd input_leds cryptd cfg80211 led_class serio_raw pcspkr soundcore i2c_i801 hci_uart shpchp btbcm i2c_hid thermal wmi btqca hid elan_i2c 
Jun 24 10:39:25 miki-laptop kernel:  drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm intel_agp intel_gtt
Jun 24 10:39:25 miki-laptop kernel: CPU: 0 PID: 765 Comm: Xorg Tainted: G     U     O    4.6.2-1-ARCH #1
Jun 24 10:39:25 miki-laptop kernel: Hardware name: ASUSTeK COMPUTER INC. UX305UA/UX305UA, BIOS UX305UA.201 10/12/2015
Jun 24 10:39:25 miki-laptop kernel: task: ffff8802692b0f40 ti: ffff880084d34000 task.ti: ffff880084d34000
Jun 24 10:39:25 miki-laptop kernel: RIP: 0010:[<0000000000000000>]  [<          (null)>]           (null)
Jun 24 10:39:25 miki-laptop kernel: RSP: 0018:ffff880084d37af0  EFLAGS: 00010286
Jun 24 10:39:25 miki-laptop kernel: RAX: ffff880084d37bb8 RBX: ffff88026a1b5c00 RCX: 000000000001fd36
Jun 24 10:39:25 miki-laptop kernel: RDX: 000000000001fd36 RSI: ffff8802685220f8 RDI: ffff88026a1b5f00
Jun 24 10:39:25 miki-laptop kernel: RBP: ffff880084d37b78 R08: ffff88026a1b5f00 R09: ffff88026a1b5f00
Jun 24 10:39:25 miki-laptop kernel: R10: ffff88020a43ed00 R11: 0000000000000000 R12: 0000000000000001
Jun 24 10:39:25 miki-laptop kernel: R13: ffff880268523368 R14: ffff8802685220f8 R15: 0000000000000000
Jun 24 10:39:25 miki-laptop kernel: FS:  00007fb7671b8940(0000) GS:ffff880273c00000(0000) knlGS:0000000000000000
Jun 24 10:39:25 miki-laptop kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jun 24 10:39:25 miki-laptop kernel: CR2: 0000000000000000 CR3: 000000007f387000 CR4: 00000000003406f0
Jun 24 10:39:25 miki-laptop kernel: Stack:
Jun 24 10:39:25 miki-laptop kernel:  ffffffffa0122da0 ffff880268520000 ffff8802685220f8 0001fd36000400d8
Jun 24 10:39:25 miki-laptop kernel:  ffff880084d37bb8 ffff8801cb6cf3c0 ffff88026a1b5c00 ffff880230579cc0
Jun 24 10:39:25 miki-laptop kernel:  ffff880084d37b40 ffffffffa0125ffd ffff880084d37b80 00000000afcbbfb4
Jun 24 10:39:25 miki-laptop kernel: Call Trace:
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffffa0122da0>] ? i915_gem_object_sync+0x1b0/0x340 [i915]
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffffa0125ffd>] ? i915_gem_object_pin+0x2d/0x30 [i915]
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffffa0135abd>] intel_execlists_submission+0x1cd/0x440 [i915]
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffffa0114a20>] i915_gem_do_execbuffer.isra.14+0xaf0/0x1450 [i915]
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffff812e6ae9>] ? idr_get_empty_slot+0x189/0x370
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffff812e6d53>] ? idr_alloc+0x83/0x100
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffffa0018079>] ? drm_gem_handle_create_tail+0xc9/0x1a0 [drm]
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffffa01160d4>] i915_gem_execbuffer2+0xd4/0x250 [i915]
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffffa0018aa2>] drm_ioctl+0x152/0x540 [drm]
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffffa0116000>] ? i915_gem_execbuffer+0x330/0x330 [i915]
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffff81209bc3>] do_vfs_ioctl+0xa3/0x5d0
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffff814a1091>] ? __sys_recvmsg+0x51/0x90
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffff8120a169>] SyS_ioctl+0x79/0x90
Jun 24 10:39:25 miki-laptop kernel:  [<ffffffff815c7272>] entry_SYSCALL_64_fastpath+0x1a/0xa4
Jun 24 10:39:25 miki-laptop kernel: Code:  Bad RIP value.
Jun 24 10:39:25 miki-laptop kernel: RIP  [<          (null)>]           (null)
Jun 24 10:39:25 miki-laptop kernel:  RSP <ffff880084d37af0>
Jun 24 10:39:25 miki-laptop kernel: CR2: 0000000000000000
Jun 24 10:39:25 miki-laptop kernel: ---[ end trace 946c0a8763286b97 ]---
Jun 24 10:39:25 miki-laptop org.a11y.atspi.Registry[5911]: XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server :0
Jun 24 10:39:25 miki-laptop org.a11y.atspi.Registry[5911]:       after 2113 requests (2113 known processed) with 0 events remaining.
-- Reboot --

Comment 3 _kossak_ 2016-07-25 12:32:43 UTC

Created attachment 125310 [details]
dmesg output

rui@joaninha:~$ uname -a
Linux joaninha 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Comment 4 Rami 2016-09-22 08:24:29 UTC

Please try the last drm-intel-nightly from http://cgit.freedesktop.org/drm-intel and report back.

Comment 5 yann 2016-10-11 06:52:21 UTC

Please re-test with Paulo's patch to apply memory workarounds for skylake: https://patchwork.freedesktop.org/series/13548/

Comment 6 Thomas 2016-10-12 06:24:15 UTC

doesnt happen anymore with recent updates here

Comment 7 yann 2016-10-12 07:00:40 UTC

(In reply to Thomas from comment #6)
> doesnt happen anymore with recent updates here

Thanks Thomas

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