Public bug reported:
I have a very strange issue related to Intel graphics drivers (i915)
with 3 connected on-board displays.
I have a Xubuntu (14.04 LTS with HWE on 4.4.0-66 kernel) desktop
computer running on a i7-6700K processor and on-board graphics (Mobo:
AsRock z170 extreme4). I connect it to 3 displays - a 3440x1400 LG
display (via onboard DP port), a 1920x1200 Dell display (via on-board
HDMI), and a Sony 4k TV (via onboard DVI and a DVI-to-HDMI adapter).
If I just connect my desktop to the first two displays (not the TV),
everything works fine (except some minor issues). However, if I connect
the 4k TV, even the TV is not on, my graphics starts to flicker every 5
min-ish (window theme turns off and then turns quickly back on); after a
few flickering, the window theme will disappear, and the screen becomes
weird - my chrome window will not fresh, or show blank boxes etc.
If I disconnect the DVI connector to the TV (just use the LG+Dell dual-
display), flickering and crash will not appear.
I want to mention that, when I connect the computer to all 3 displays, I
was actually able to get video output to all displays (I used arandr to
configure them). I can even get 4k output to the 4k TV at 30Hz.
I can't find a useful log entry when the flicking or graphics crash
happens. I can only see a "CPU pipe A FIFO underrun" for pipe A/B/F (log
attached at the end), but I can see many similar errors in my log and
the appearance is not correlated to the flickering/crash. The "pipe A
FIFO underrun" issue was previously reported in Bug#1550779.
I also see "intel(0): HDMI max TMDS frequency 300000KHz" entry in my
Xorg.0.log file constantly, I also do not see an consistent mapping
between the log entry and the flickering.
Can anyone tell me how to properly debug this? what can I do to get a
log for what was wrong?
-----------------------------------
[ 145.033055] WARNING: CPU: 2 PID: 1804 at
/build/linux-lts-xenial-drAJVo/linux-lts-xenial-4.4.0/ubuntu/i915/intel_pm.c:3675
skl_update_other_pipe_wm+0x191/0x1a0 [i915_bpo]()
[ 145.033058] WARN_ON(!wm_changed)
[ 145.033060] Modules linked in: nfsv3 pci_stub vboxpci(OE) vboxnetadp(OE)
vboxnetflt(OE) vboxdrv(OE) autofs4 rpcsec_gss_krb5 nfsv4 usblp joydev
input_leds ti_usb_3410_5052 usbserial hid_generic gspca_ov534 gspca_main
v4l2_common videodev media snd_usb_audio snd_usbmidi_lib usbhid
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic nvidia_uvm(POE)
uas usb_storage intel_rapl x86_pkg_temp_thermal intel_powerclamp mxm_wmi
coretemp kvm_intel bnep kvm rfcomm irqbypass crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel snd_hda_intel snd_hda_codec snd_hda_core nvidia_drm(POE)
nvidia_modeset(POE) snd_hwdep aesni_intel snd_pcm aes_x86_64 nvidia(POE) lrw
gf128mul snd_seq_midi snd_seq_midi_event glue_helper ablk_helper snd_rawmidi
cryptd snd_seq snd_seq_device snd_timer serio_raw snd soundcore nfsd i915_bpo
auth_rpcgss nfs_acl nfs binfmt_misc lockd grace 8250_fintek hci_uart sunrpc
intel_ips drm_kms_helper btbcm pinctrl_sunrisepoint btqca fscache pinctrl_intel
btintel intel_lpss_acpi
bluetooth i2c_hid intel_lpss drm hid video i2c_algo_bit fb_sys_fops
syscopyarea sysfillrect sysimgblt shpchp mei_me mei mac_hid acpi_als wmi
kfifo_buf industrialio acpi_pad parport_pc ppdev lp parport e1000e psmouse ptp
pps_core ahci nvme libahci fjes
[ 145.033284] CPU: 2 PID: 1804 Comm: Xorg Tainted: P W OE
4.4.0-66-generic #87~14.04.1-Ubuntu
[ 145.033287] Hardware name: To Be Filled By O.E.M. To Be Filled By
O.E.M./Z170 Extreme4, BIOS P7.00 09/09/2016
[ 145.033290] 0000000000000000 ffff88086e5879a0 ffffffff813dc80c
ffff88086e5879e8
[ 145.033295] ffffffffc0556700 ffff88086e5879d8 ffffffff8107e9d6
ffff88086d898000
[ 145.033300] ffff88086d89b000 0000000000000004 ffff880871924b78
ffff88086e587a64
[ 145.033305] Call Trace:
[ 145.033311] [<ffffffff813dc80c>] dump_stack+0x63/0x87
[ 145.033317] [<ffffffff8107e9d6>] warn_slowpath_common+0x86/0xc0
[ 145.033323] [<ffffffff8107ea5c>] warn_slowpath_fmt+0x4c/0x50
[ 145.033358] [<ffffffffc0470000>] ? ironlake_irq_handler+0x660/0xba0
[i915_bpo]
[ 145.033393] [<ffffffffc047c441>] skl_update_other_pipe_wm+0x191/0x1a0
[i915_bpo]
[ 145.033435] [<ffffffffc047c5ea>] skl_update_wm+0x19a/0x6f0 [i915_bpo]
[ 145.033491] [<ffffffffc04c8060>] ? chv_write8+0x390/0x390 [i915_bpo]
[ 145.033551] [<ffffffffc04f3580>] ? skl_ddi_pll_disable+0x70/0x80 [i915_bpo]
[ 145.033590] [<ffffffffc047dc3e>] intel_update_watermarks+0x1e/0x30
[i915_bpo]
[ 145.033649] [<ffffffffc04e8352>] intel_atomic_commit+0x432/0x1440 [i915_bpo]
[ 145.033688] [<ffffffffc01f0374>] ?
drm_atomic_set_crtc_for_connector+0x44/0xf0 [drm]
[ 145.033720] [<ffffffffc01f14d7>] drm_atomic_commit+0x37/0x60 [drm]
[ 145.033743] [<ffffffffc0312377>] drm_atomic_helper_set_config+0x77/0xb0
[drm_kms_helper]
[ 145.033775] [<ffffffffc01e0994>] drm_mode_set_config_internal+0x64/0x100
[drm]
[ 145.033805] [<ffffffffc01e4a3d>] drm_mode_setcrtc+0xdd/0x4f0 [drm]
[ 145.033828] [<ffffffffc01d687d>] drm_ioctl+0x25d/0x4f0 [drm]
[ 145.033853] [<ffffffffc01e4960>] ? drm_mode_setplane+0x1c0/0x1c0 [drm]
[ 145.033860] [<ffffffff810ea345>] ? hrtimer_start_range_ns+0x1d5/0x370
[ 145.033867] [<ffffffff81213dbd>] do_vfs_ioctl+0x2dd/0x4c0
[ 145.033872] [<ffffffff816e7fe2>] ? __sys_recvmsg+0x62/0x80
[ 145.033879] [<ffffffff81214019>] SyS_ioctl+0x79/0x90
[ 145.033884] [<ffffffff81807df6>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 145.033887] ---[ end trace f51213202db0a02b ]---
[ 145.040751] [drm:intel_cpu_fifo_underrun_irq_handler [i915_bpo]] *ERROR* CPU
pipe A FIFO underrun
[ 145.041071] [drm:intel_cpu_fifo_underrun_irq_handler [i915_bpo]] *ERROR* CPU
pipe B FIFO underrun
------------------------------------------
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1675204
Title:
Intel HD graphics crashes when connecting to 3 outputs (DVI+HDMI+DP)
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