UBILINUX 3.0RC3 - highly unstable - with X

Jaap Crezee
Jaap Crezee New Member Posts: 19
Hello all,

It seems that our unit is extremely unstable with UBIlinux 3.0RC3; as soon as the graphical interface is loaded 3 out of 5 times the board reboots, 1 out of 5 times the display goes blank and the power drawn is going up to 5V 2A; the system hangs; keyboard caps and numlock no longer respond, 1 out of 5 times the login screen is displayed but hangs after trying to login. So far I have been only able to successfully login for like 2 or 3 times in 2 days (captured a kernel log file fortunately, see attached!).
I modified the bootloader config a little to boot from USB (see attached kernel command line): currently our own firmware is on the eMMC and is not used or touched when UBIlinux is booted.
I already tried turning off the GFX boost/turbo in the bios but that does not help. The strange thing is, when using our own firmware running on vanilla 4.5.x there are no problems what soever. I only wanted to use ubilinux to test whether certain features work under ubilinux.

<snip>
Jun 15 20:21:48 ubilinux kernel: [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in base.adjusted_mode.crtc_clock (expected 51200, found 12847)
Jun 15 20:21:48 ubilinux kernel: [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in port_clock (expected 51200, found 12847)
Jun 15 20:21:48 ubilinux kernel: ------------[ cut here ]------------
Jun 15 20:21:48 ubilinux kernel: WARNING: CPU: 1 PID: 14 at /tmp/buildd/linux-ubilinux-4.4.11/drivers/gpu/drm/i915/intel_display.c:12822 intel_atomic_commit+0xb55/0x13b0 [i915]()
Jun 15 20:21:48 ubilinux kernel: pipe state doesn't match!
Jun 15 20:21:48 ubilinux kernel: Modules linked in: intel_rapl intel_powerclamp joydev coretemp kvm_intel hid_multitouch kvm i915 irqbypass crct10dif_pclmul crc32_pclmul sha256_ssse3 sha256_generic hmac drbg spidev iTCO_wdt ansi_cprng snd_pcm dwc3 snd_timer udc_core iTCO_vendor_support snd soundcore evdev drm_kms_helper aesni_intel efi_pstore aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd drm efivars video iosf_mbi int3403_thermal 8250_fintek ti_adc081c int340x_thermal_zone industrialio battery lpc_ich mfd_core tpm_crb pwm_lpss_platform acpi_pad ac tpm_tis tpm processor int3400_thermal acpi_thermal_rel dwc3_pci shpchp i2c_algo_bit spi_pxa2xx_platform pwm_lpss button i2c_dev fuse autofs4 ext4 crc16 mbcache jbd2 sg sd_mod hid_microsoft usbhid hid usb_storage scsi_mod mmc_block xhci_pci xhci_hcd crc32c_intel r8169
Jun 15 20:21:48 ubilinux kernel:  mii usbcore usb_common thermal fjes sdhci_acpi sdhci mmc_core
Jun 15 20:21:48 ubilinux kernel: CPU: 1 PID: 14 Comm: kworker/1:0 Tainted: G        W       4.4.0-ubi2-amd64 #1 Debian 4.4.11-2
Jun 15 20:21:48 ubilinux kernel: Hardware name: AAEON UP-CHT01/UP-CHT01, BIOS UPC1BM0R 05/24/2016
Jun 15 20:21:48 ubilinux kernel: Workqueue: events output_poll_execute [drm_kms_helper]
Jun 15 20:21:48 ubilinux kernel:  0000000000000286 00000000172e7b12 ffffffff81306ce7 ffff8800557d7c08
Jun 15 20:21:48 ubilinux kernel:  ffffffffa0748fd8 ffffffff8107cf53 ffff880058030800 ffff8800557d7c60
Jun 15 20:21:48 ubilinux kernel:  ffff8800523d4b48 ffff880054e57000 0000000000000000 ffffffff8107cfee
Jun 15 20:21:48 ubilinux kernel: Call Trace:
Jun 15 20:21:48 ubilinux kernel:  [<ffffffff81306ce7>] ? dump_stack+0x5c/0x85
Jun 15 20:21:48 ubilinux kernel:  [<ffffffff8107cf53>] ? warn_slowpath_common+0x83/0xc0
Jun 15 20:21:48 ubilinux kernel:  [<ffffffff8107cfee>] ? warn_slowpath_fmt+0x5e/0x80
Jun 15 20:21:48 ubilinux kernel:  [<ffffffffa06e39b5>] ? intel_atomic_commit+0xb55/0x13b0 [i915]
Jun 15 20:21:48 ubilinux kernel:  [<ffffffffa034ee7c>] ? drm_atomic_check_only+0x14c/0x5d0 [drm]
Jun 15 20:21:48 ubilinux kernel:  [<ffffffffa034ec75>] ? drm_atomic_add_affected_connectors+0x25/0xe0 [drm]
Jun 15 20:21:48 ubilinux kernel:  [<ffffffffa0485295>] ? restore_fbdev_mode+0x245/0x270 [drm_kms_helper]
Jun 15 20:21:48 ubilinux kernel:  [<ffffffffa034dc4b>] ? drm_modeset_lock_all_crtcs+0x9b/0xb0 [drm]
Jun 15 20:21:48 ubilinux kernel:  [<ffffffffa048738e>] ? drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x70 [drm_kms_helper]
Jun 15 20:21:48 ubilinux kernel:  [<ffffffffa04873f9>] ? drm_fb_helper_set_par+0x29/0x50 [drm_kms_helper]
Jun 15 20:21:48 ubilinux kernel:  [<ffffffffa0487315>] ? drm_fb_helper_hotplug_event+0xa5/0xf0 [drm_kms_helper]
Jun 15 20:21:48 ubilinux kernel:  [<ffffffffa047b0f8>] ? output_poll_execute+0x198/0x1e0 [drm_kms_helper]
Jun 15 20:21:48 ubilinux kernel:  [<ffffffff81095d70>] ? process_one_work+0x150/0x410
Jun 15 20:21:48 ubilinux kernel:  [<ffffffff81096816>] ? worker_thread+0x66/0x470
Jun 15 20:21:48 ubilinux kernel:  [<ffffffff810967b0>] ? rescuer_thread+0x320/0x320
Jun 15 20:21:48 ubilinux kernel:  [<ffffffff8109bde2>] ? kthread+0xe2/0x100
Jun 15 20:21:48 ubilinux kernel:  [<ffffffff8109bd00>] ? kthread_park+0x50/0x50
Jun 15 20:21:48 ubilinux kernel:  [<ffffffff815ce69f>] ? ret_from_fork+0x3f/0x70
Jun 15 20:21:48 ubilinux kernel:  [<ffffffff8109bd00>] ? kthread_park+0x50/0x50
Jun 15 20:21:48 ubilinux kernel: ---[ end trace 29233254e7e51084 ]---
<another snip>
Jun 15 20:21:56 ubilinux kernel: [drm] stuck on render ring
Jun 15 20:21:56 ubilinux kernel: [drm] GPU HANG: ecode 8:0:0x85dffffb, in Xorg [838], reason: Ring hung, action: reset
Jun 15 20:21:56 ubilinux kernel: [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
Jun 15 20:21:56 ubilinux kernel: [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
Jun 15 20:21:56 ubilinux kernel: [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
Jun 15 20:21:56 ubilinux kernel: [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
Jun 15 20:21:56 ubilinux kernel: [drm] GPU crash dump saved to /sys/class/drm/card0/error
Jun 15 20:21:56 ubilinux kernel: drm/i915: Resetting chip after gpu hang
</snip>

also:
Jun 15 20:23:40 ubilinux kernel: had: snd_intelhad_open: HDMI cable plugged-out
Jun 15 20:23:40 ubilinux kernel: had: snd_intelhad_open: HDMI cable plugged-out
Jun 15 20:23:45 ubilinux kernel: had: snd_intelhad_open: HDMI cable plugged-out
Jun 15 20:23:45 ubilinux kernel: had: snd_intelhad_open: HDMI cable plugged-out
Jun 15 20:23:45 ubilinux kernel: r8169 0000:01:00.0 eth0: rtl_counters_cond == 1 (loop: 1000, delay: 10).
Jun 15 20:23:46 ubilinux kernel: had: snd_intelhad_open: HDMI cable plugged-out
Jun 15 20:23:46 ubilinux kernel: had: snd_intelhad_open: HDMI cable plugged-out

but I never removed any cable; there's no HDMI cable attached anyway...

Any hints and tricks to get it more stable?

regards,


Jaap Crezee
ZUPR BV

Comments

  • Jaap Crezee
    Jaap Crezee New Member Posts: 19
  • Javier Arteaga
    Javier Arteaga Emutex Posts: 163 mod
    Hi Jaap,

    Interesting! Many thanks for the detailed report. The current kernel for ubilinux 3.0RC3 doesn't yet enable DSI output for that particular screen. Besides the stability issues, do you actually get any Xorg graphics at all on the touchscreen when using ubilinux?

    Note this line from your kernel log:
    Jun 15 20:21:46 ubilinux kernel: [drm:intel_parse_bios [i915]] *ERROR* Unable to parse MIPI Sequence Block v3+
    
    More recent mainline kernel releases support MIPI Sequence Block v3 parsing, which is required for this screen.

    The lines about the HDMI cable seem to indicate that the audio support added to the i915 driver wrongly assumes a HDMI output is available, which in your case is not.

    We'll test further and keep you posted.
  • Jaap Crezee
    Jaap Crezee New Member Posts: 19
    If you are in need of more data or want me to test something(s), just let me know.
  • Jaap Crezee
    Jaap Crezee New Member Posts: 19
    with mainline:
    [    0.000000] Linux version 4.6.2+ (jaap@jaap) (gcc version 5.3.0 (Buildroot 2016.05-git-01072-g0540fce) ) #1 SMP PREEMPT Wed Jun 15 21:55:20 CEST 2016
    
    [    2.109390] [drm] Initialized drm 1.1.0 20060810
    [    2.115864] [drm] Memory usable by graphics device = 2048M
    [    2.122036] checking generic (80000000 260000) vs hw (80000000 20000000)
    [    2.122041] fb: switching to inteldrmfb from EFI VGA
    [    2.127638] Console: switching to colour dummy device 80x25
    [    2.134060] [drm] Replacing VGA console driver
    [    2.139500] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
    [    2.146921] [drm] Driver supports precise vblank timestamp query.
    [    2.235029] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
    [    2.256018] ------------[ cut here ]------------
    [    2.261224] WARNING: CPU: 3 PID: 1 at drivers/gpu/drm/i915/intel_display.c:690 chv_calc_dpll_params+0x9c/0xc0
    [    2.272307] WARN_ON(clock->n == 0 || clock->p == 0)
    [    2.277566] CPU: 3 PID: 1 Comm: swapper/0 Not tainted 4.6.2+ #1
    [    2.284381] Hardware name: AAEON UP-CHT01/UP-CHT01, BIOS UPC1BM0R 05/24/2016
    [    2.292259]  0000000000000000 ffff88005501b840 ffffffffac14ef8d ffff88005501b890
    [    2.300554]  0000000000000000 ffff88005501b880 ffffffffabeaf635 000002b20000800c
    [    2.308850]  ffff88005a71fc00 0000000000000000 0000000000000000 ffff88005a980000
    [    2.317140] Call Trace:
    [    2.319876]  [<ffffffffac14ef8d>] dump_stack+0x4d/0x70
    [    2.325620]  [<ffffffffabeaf635>] __warn+0xc5/0xe0
    [    2.330973]  [<ffffffffabeaf69c>] warn_slowpath_fmt+0x4c/0x50
    [    2.337397]  [<ffffffffac31529c>] chv_calc_dpll_params+0x9c/0xc0
    [    2.344113]  [<ffffffffac315a16>] i9xx_get_pipe_config+0x586/0x680
    [    2.351023]  [<ffffffffac322c21>] intel_modeset_setup_hw_state+0xc1/0x1040
    [    2.358711]  [<ffffffffac28e928>] ? drm_modeset_lock_all_ctx+0xa8/0xc0
    [    2.365997]  [<ffffffffac32599c>] intel_modeset_init+0xb2c/0x1d30
    [    2.372812]  [<ffffffffac353f6b>] ? intel_setup_gmbus+0x2bb/0x350
    [    2.379624]  [<ffffffffac35f90b>] i915_driver_load+0xffb/0x1760
    [    2.386240]  [<ffffffffabeec461>] ? __wake_up+0x41/0x50
    [    2.392083]  [<ffffffffabec43ed>] ? call_usermodehelper_exec+0xed/0x150
    [    2.399468]  [<ffffffffac15281f>] ? kobject_uevent_env+0xff/0x510
    [    2.406281]  [<ffffffffac396e82>] ? get_device+0x12/0x20
    [    2.412218]  [<ffffffffac39b650>] ? klist_class_dev_get+0x10/0x20
    [    2.419031]  [<ffffffffac8a5aba>] ? klist_node_init+0x3a/0x60
    [    2.425453]  [<ffffffffac8a5c26>] ? klist_add_tail+0x46/0x50
    [    2.431778]  [<ffffffffac396930>] ? device_add+0x220/0x650
    [    2.437911]  [<ffffffffac278ef4>] drm_dev_register+0xa4/0xb0
    [    2.444236]  [<ffffffffac27a8de>] drm_get_pci_dev+0x8e/0x1e0
    [    2.450563]  [<ffffffffac29e30f>] i915_pci_probe+0x2f/0x50
    [    2.456695]  [<ffffffffac1969d4>] local_pci_probe+0x44/0x90
    [    2.462923]  [<ffffffffac1974be>] ? pci_match_device+0xde/0x100
    [    2.469538]  [<ffffffffac197876>] pci_device_probe+0xe6/0x130
    [    2.475962]  [<ffffffffac39a9fe>] driver_probe_device+0x1fe/0x2c0
    [    2.482777]  [<ffffffffac39ab59>] __driver_attach+0x99/0xa0
    [    2.489006]  [<ffffffffac39aac0>] ? driver_probe_device+0x2c0/0x2c0
    [    2.496011]  [<ffffffffac398aa1>] bus_for_each_dev+0x61/0xa0
    [    2.502338]  [<ffffffffac39ac49>] driver_attach+0x19/0x20
    [    2.508371]  [<ffffffffac399598>] bus_add_driver+0x1a8/0x220
    [    2.514696]  [<ffffffffac39b49b>] driver_register+0x5b/0xe0
    [    2.520925]  [<ffffffffacf9a340>] ? ttm_init+0x60/0x60
    [    2.526667]  [<ffffffffac197907>] __pci_register_driver+0x47/0x50
    [    2.533477]  [<ffffffffac27ab0a>] drm_pci_init+0xda/0x100
    [    2.539511]  [<ffffffffacf9a340>] ? ttm_init+0x60/0x60
    [    2.545252]  [<ffffffffacf9a3d2>] i915_init+0x92/0x99
    [    2.550896]  [<ffffffffacf9a340>] ? ttm_init+0x60/0x60
    [    2.556641]  [<ffffffffacf58064>] do_one_initcall+0x180/0x196
    [    2.563064]  [<ffffffffabeccc00>] ? parse_args+0x160/0x3c0
    [    2.569196]  [<ffffffffacf581cd>] kernel_init_freeable+0x153/0x1d9
    [    2.576103]  [<ffffffffac8a66a9>] kernel_init+0x9/0x100
    [    2.581943]  [<ffffffffac8acc42>] ret_from_fork+0x22/0x40
    [    2.587979]  [<ffffffffac8a66a0>] ? rest_init+0x90/0x90
    [    2.593836] ---[ end trace c3129ad9ddf3dde7 ]---
    [    2.650988] ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no)
    [    2.661149] acpi device:01: registered as cooling_device4
    [    2.667934] acpi device:02: registered as cooling_device5
    [    2.674724] acpi device:03: registered as cooling_device6
    [    2.681516] acpi device:04: registered as cooling_device7
    [    2.688317] acpi device:05: registered as cooling_device8
    [    2.695106] acpi device:06: registered as cooling_device9
    [    2.701908] acpi device:07: registered as cooling_device10
    [    2.708805] acpi device:08: registered as cooling_device11
    [    2.715122] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input2
    [    2.725429] [drm] Initialized i915 1.6.0 20160229 for 0000:00:02.0 on minor 0
    
    [    3.471995] ------------[ cut here ]------------
    [    3.472006] WARNING: CPU: 1 PID: 791 at drivers/gpu/drm/i915/intel_sideband.c:187 vlv_dpio_read+0x66/0x80
    [    3.472008] DPIO read pipe A reg 0x8134 == 0xffffffff
    [    3.472015] CPU: 1 PID: 791 Comm: kworker/1:1 Tainted: G        W       4.6.2+ #1
    [    3.472017] Hardware name: AAEON UP-CHT01/UP-CHT01, BIOS UPC1BM0R 05/24/2016
    [    3.472025] Workqueue: events output_poll_execute
    [    3.472030]  0000000000000000 ffff88005a69faa0 ffffffffac14ef8d ffff88005a69faf0
    [    3.472034]  0000000000000000 ffff88005a69fae0 ffffffffabeaf635 000000bbac2fe247
    [    3.472037]  0000000000000000 0000000000008134 0000000000000000 ffff88005a980000
    [    3.472040] Call Trace:
    [    3.472047]  [<ffffffffac14ef8d>] dump_stack+0x4d/0x70
    [    3.472051]  [<ffffffffabeaf635>] __warn+0xc5/0xe0
    [    3.472054]  [<ffffffffabeaf69c>] warn_slowpath_fmt+0x4c/0x50
    [    3.472058]  [<ffffffffac32f416>] vlv_dpio_read+0x66/0x80
    [    3.472063]  [<ffffffffac315955>] i9xx_get_pipe_config+0x4c5/0x680
    [    3.472068]  [<ffffffffac2817e6>] ? drm_property_unreference_blob+0x96/0xc0
    [    3.472072]  [<ffffffffac31cb38>] intel_atomic_commit+0xc18/0x1630
    [    3.472076]  [<ffffffffabeec260>] ? wake_atomic_t_function+0x60/0x60
    [    3.472082]  [<ffffffffac2905e2>] drm_atomic_commit+0x32/0x50
    [    3.472087]  [<ffffffffac26cd4e>] restore_fbdev_mode+0x23e/0x270
    [    3.472090]  [<ffffffffac28e928>] ? drm_modeset_lock_all_ctx+0xa8/0xc0
    [    3.472094]  [<ffffffffac26f9ae>] drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x80
    [    3.472097]  [<ffffffffac26fa28>] drm_fb_helper_set_par+0x28/0x50
    [    3.472100]  [<ffffffffac26f927>] drm_fb_helper_hotplug_event+0xd7/0x130
    [    3.472104]  [<ffffffffac334809>] intel_fbdev_output_poll_changed+0x19/0x20
    [    3.472108]  [<ffffffffac262222>] drm_kms_helper_hotplug_event+0x22/0x30
    [    3.472111]  [<ffffffffac2623cc>] output_poll_execute+0x19c/0x1e0
    [    3.472117]  [<ffffffffabec6e9f>] process_one_work+0x15f/0x4c0
    [    3.472120]  [<ffffffffabec7244>] worker_thread+0x44/0x4f0
    [    3.472124]  [<ffffffffabec7200>] ? process_one_work+0x4c0/0x4c0
    [    3.472127]  [<ffffffffabec7200>] ? process_one_work+0x4c0/0x4c0
    [    3.472132]  [<ffffffffabecd056>] kthread+0xc6/0xe0
    [    3.472138]  [<ffffffffac8acc42>] ret_from_fork+0x22/0x40
    [    3.472142]  [<ffffffffabeccf90>] ? __kthread_parkme+0x70/0x70
    [    3.472145] ---[ end trace c3129ad9ddf3ddea ]---
    [    3.474019] ------------[ cut here ]------------
    [    3.474036] WARNING: CPU: 1 PID: 791 at drivers/gpu/drm/i915/intel_sideband.c:187 vlv_dpio_read+0x66/0x80
    [    3.474041] DPIO read pipe A reg 0x8000 == 0xffffffff
    [    3.474050] CPU: 1 PID: 791 Comm: kworker/1:1 Tainted: G        W       4.6.2+ #1
    [    3.474054] Hardware name: AAEON UP-CHT01/UP-CHT01, BIOS UPC1BM0R 05/24/2016
    [    3.474067] Workqueue: events output_poll_execute
    [    3.474079]  0000000000000000 ffff88005a69faa0 ffffffffac14ef8d ffff88005a69faf0
    [    3.474090]  0000000000000000 ffff88005a69fae0 ffffffffabeaf635 000000bbac2fe247
    [    3.474100]  0000000000000000 0000000000008000 0000000000000000 ffff88005a980000
    [    3.474102] Call Trace:
    [    3.474114]  [<ffffffffac14ef8d>] dump_stack+0x4d/0x70
    [    3.474122]  [<ffffffffabeaf635>] __warn+0xc5/0xe0
    [    3.474131]  [<ffffffffabeaf69c>] warn_slowpath_fmt+0x4c/0x50
    [    3.474142]  [<ffffffffac32f416>] vlv_dpio_read+0x66/0x80
    [    3.474154]  [<ffffffffac315967>] i9xx_get_pipe_config+0x4d7/0x680
    [    3.474166]  [<ffffffffac2817e6>] ? drm_property_unreference_blob+0x96/0xc0
    [    3.474175]  [<ffffffffac31cb38>] intel_atomic_commit+0xc18/0x1630
    [    3.474185]  [<ffffffffabeec260>] ? wake_atomic_t_function+0x60/0x60
    [    3.474196]  [<ffffffffac2905e2>] drm_atomic_commit+0x32/0x50
    [    3.474205]  [<ffffffffac26cd4e>] restore_fbdev_mode+0x23e/0x270
    [    3.474215]  [<ffffffffac28e928>] ? drm_modeset_lock_all_ctx+0xa8/0xc0
    [    3.474226]  [<ffffffffac26f9ae>] drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x80
    [    3.474235]  [<ffffffffac26fa28>] drm_fb_helper_set_par+0x28/0x50
    [    3.474245]  [<ffffffffac26f927>] drm_fb_helper_hotplug_event+0xd7/0x130
    [    3.474257]  [<ffffffffac334809>] intel_fbdev_output_poll_changed+0x19/0x20
    [    3.474268]  [<ffffffffac262222>] drm_kms_helper_hotplug_event+0x22/0x30
    [    3.474278]  [<ffffffffac2623cc>] output_poll_execute+0x19c/0x1e0
    [    3.474287]  [<ffffffffabec6e9f>] process_one_work+0x15f/0x4c0
    [    3.474295]  [<ffffffffabec7244>] worker_thread+0x44/0x4f0
    [    3.474304]  [<ffffffffabec7200>] ? process_one_work+0x4c0/0x4c0
    [    3.474313]  [<ffffffffabec7200>] ? process_one_work+0x4c0/0x4c0
    [    3.474322]  [<ffffffffabecd056>] kthread+0xc6/0xe0
    [    3.474337]  [<ffffffffac8acc42>] ret_from_fork+0x22/0x40
    [    3.474341]  [<ffffffffabeccf90>] ? __kthread_parkme+0x70/0x70
    [    3.474342] ---[ end trace c3129ad9ddf3ddeb ]---
    
    [    3.476033] WARNING: CPU: 1 PID: 791 at drivers/gpu/drm/i915/intel_sideband.c:187 vlv_dpio_read+0x66/0x80
    [    3.476037] DPIO read pipe A reg 0x8004 == 0xffffffff
    [    3.476046] CPU: 1 PID: 791 Comm: kworker/1:1 Tainted: G        W       4.6.2+ #1
    [    3.476051] Hardware name: AAEON UP-CHT01/UP-CHT01, BIOS UPC1BM0R 05/24/2016
    [    3.476063] Workqueue: events output_poll_execute
    [    3.476075]  0000000000000000 ffff88005a69faa0 ffffffffac14ef8d ffff88005a69faf0
    [    3.476086]  0000000000000000 ffff88005a69fae0 ffffffffabeaf635 000000bbac2fe247
    [    3.476096]  0000000000000000 0000000000008004 0000000000000000 ffff88005a980000
    [    3.476098] Call Trace:
    [    3.476110]  [<ffffffffac14ef8d>] dump_stack+0x4d/0x70
    [    3.476118]  [<ffffffffabeaf635>] __warn+0xc5/0xe0
    [    3.476127]  [<ffffffffabeaf69c>] warn_slowpath_fmt+0x4c/0x50
    [    3.476138]  [<ffffffffac32f416>] vlv_dpio_read+0x66/0x80
    [    3.476150]  [<ffffffffac315979>] i9xx_get_pipe_config+0x4e9/0x680
    [    3.476162]  [<ffffffffac2817e6>] ? drm_property_unreference_blob+0x96/0xc0
    [    3.476171]  [<ffffffffac31cb38>] intel_atomic_commit+0xc18/0x1630
    [    3.476181]  [<ffffffffabeec260>] ? wake_atomic_t_function+0x60/0x60
    [    3.476192]  [<ffffffffac2905e2>] drm_atomic_commit+0x32/0x50
    [    3.476201]  [<ffffffffac26cd4e>] restore_fbdev_mode+0x23e/0x270
    [    3.476211]  [<ffffffffac28e928>] ? drm_modeset_lock_all_ctx+0xa8/0xc0
    [    3.476222]  [<ffffffffac26f9ae>] drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x80
    [    3.476231]  [<ffffffffac26fa28>] drm_fb_helper_set_par+0x28/0x50
    [    3.476241]  [<ffffffffac26f927>] drm_fb_helper_hotplug_event+0xd7/0x130
    [    3.476253]  [<ffffffffac334809>] intel_fbdev_output_poll_changed+0x19/0x20
    [    3.476264]  [<ffffffffac262222>] drm_kms_helper_hotplug_event+0x22/0x30
    [    3.476274]  [<ffffffffac2623cc>] output_poll_execute+0x19c/0x1e0
    [    3.476283]  [<ffffffffabec6e9f>] process_one_work+0x15f/0x4c0
    [    3.476291]  [<ffffffffabec7244>] worker_thread+0x44/0x4f0
    [    3.476307]  [<ffffffffabec7200>] ? process_one_work+0x4c0/0x4c0
    [    3.476310]  [<ffffffffabec7200>] ? process_one_work+0x4c0/0x4c0
    [    3.476313]  [<ffffffffabecd056>] kthread+0xc6/0xe0
    [    3.476316]  [<ffffffffac8acc42>] ret_from_fork+0x22/0x40
    [    3.476320]  [<ffffffffabeccf90>] ? __kthread_parkme+0x70/0x70
    [    3.476321] ---[ end trace c3129ad9ddf3ddec ]---
    [    3.478016] ------------[ cut here ]------------
    [    3.478033] WARNING: CPU: 1 PID: 791 at drivers/gpu/drm/i915/intel_sideband.c:187 vlv_dpio_read+0x66/0x80
    [    3.478038] DPIO read pipe A reg 0x8008 == 0xffffffff
    [    3.478046] CPU: 1 PID: 791 Comm: kworker/1:1 Tainted: G        W       4.6.2+ #1
    [    3.478050] Hardware name: AAEON UP-CHT01/UP-CHT01, BIOS UPC1BM0R 05/24/2016
    [    3.478062] Workqueue: events output_poll_execute
    [    3.478074]  0000000000000000 ffff88005a69faa0 ffffffffac14ef8d ffff88005a69faf0
    [    3.478085]  0000000000000000 ffff88005a69fae0 ffffffffabeaf635 000000bbac2fe247
    [    3.478095]  0000000000000000 0000000000008008 0000000000000000 ffff88005a980000
    [    3.478097] Call Trace:
    [    3.478109]  [<ffffffffac14ef8d>] dump_stack+0x4d/0x70
    [    3.478117]  [<ffffffffabeaf635>] __warn+0xc5/0xe0
    [    3.478126]  [<ffffffffabeaf69c>] warn_slowpath_fmt+0x4c/0x50
    [    3.478136]  [<ffffffffac32f416>] vlv_dpio_read+0x66/0x80
    [    3.478148]  [<ffffffffac31598b>] i9xx_get_pipe_config+0x4fb/0x680
    [    3.478160]  [<ffffffffac2817e6>] ? drm_property_unreference_blob+0x96/0xc0
    [    3.478170]  [<ffffffffac31cb38>] intel_atomic_commit+0xc18/0x1630
    [    3.478180]  [<ffffffffabeec260>] ? wake_atomic_t_function+0x60/0x60
    [    3.478191]  [<ffffffffac2905e2>] drm_atomic_commit+0x32/0x50
    [    3.478200]  [<ffffffffac26cd4e>] restore_fbdev_mode+0x23e/0x270
    [    3.478210]  [<ffffffffac28e928>] ? drm_modeset_lock_all_ctx+0xa8/0xc0
    [    3.478221]  [<ffffffffac26f9ae>] drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x80
    [    3.478230]  [<ffffffffac26fa28>] drm_fb_helper_set_par+0x28/0x50
    [    3.478240]  [<ffffffffac26f927>] drm_fb_helper_hotplug_event+0xd7/0x130
    [    3.478251]  [<ffffffffac334809>] intel_fbdev_output_poll_changed+0x19/0x20
    [    3.478262]  [<ffffffffac262222>] drm_kms_helper_hotplug_event+0x22/0x30
    [    3.478272]  [<ffffffffac2623cc>] output_poll_execute+0x19c/0x1e0
    [    3.478282]  [<ffffffffabec6e9f>] process_one_work+0x15f/0x4c0
    [    3.478295]  [<ffffffffabec7244>] worker_thread+0x44/0x4f0
    [    3.478298]  [<ffffffffabec7200>] ? process_one_work+0x4c0/0x4c0
    [    3.478300]  [<ffffffffabec7200>] ? process_one_work+0x4c0/0x4c0
    [    3.478304]  [<ffffffffabecd056>] kthread+0xc6/0xe0
    [    3.478307]  [<ffffffffac8acc42>] ret_from_fork+0x22/0x40
    [    3.478311]  [<ffffffffabeccf90>] ? __kthread_parkme+0x70/0x70
    [    3.478312] ---[ end trace c3129ad9ddf3dded ]---
    
    [    3.480012] ------------[ cut here ]------------
    [    3.480029] WARNING: CPU: 1 PID: 791 at drivers/gpu/drm/i915/intel_sideband.c:187 vlv_dpio_read+0x66/0x80
    [    3.480033] DPIO read pipe A reg 0x800c == 0xffffffff
    [    3.480042] CPU: 1 PID: 791 Comm: kworker/1:1 Tainted: G        W       4.6.2+ #1
    [    3.480046] Hardware name: AAEON UP-CHT01/UP-CHT01, BIOS UPC1BM0R 05/24/2016
    [    3.480058] Workqueue: events output_poll_execute
    [    3.480070]  0000000000000000 ffff88005a69faa0 ffffffffac14ef8d ffff88005a69faf0
    [    3.480081]  0000000000000000 ffff88005a69fae0 ffffffffabeaf635 000000bbac2fe247
    [    3.480091]  0000000000000000 000000000000800c 0000000000000000 ffff88005a980000
    [    3.480093] Call Trace:
    [    3.480105]  [<ffffffffac14ef8d>] dump_stack+0x4d/0x70
    [    3.480113]  [<ffffffffabeaf635>] __warn+0xc5/0xe0
    [    3.480122]  [<ffffffffabeaf69c>] warn_slowpath_fmt+0x4c/0x50
    [    3.480132]  [<ffffffffac32f416>] vlv_dpio_read+0x66/0x80
    [    3.480144]  [<ffffffffac31599d>] i9xx_get_pipe_config+0x50d/0x680
    [    3.480156]  [<ffffffffac2817e6>] ? drm_property_unreference_blob+0x96/0xc0
    [    3.480166]  [<ffffffffac31cb38>] intel_atomic_commit+0xc18/0x1630
    [    3.480177]  [<ffffffffabeec260>] ? wake_atomic_t_function+0x60/0x60
    [    3.480189]  [<ffffffffac2905e2>] drm_atomic_commit+0x32/0x50
    [    3.480199]  [<ffffffffac26cd4e>] restore_fbdev_mode+0x23e/0x270
    [    3.480208]  [<ffffffffac28e928>] ? drm_modeset_lock_all_ctx+0xa8/0xc0
    [    3.480219]  [<ffffffffac26f9ae>] drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x80
    [    3.480228]  [<ffffffffac26fa28>] drm_fb_helper_set_par+0x28/0x50
    [    3.480238]  [<ffffffffac26f927>] drm_fb_helper_hotplug_event+0xd7/0x130
    [    3.480250]  [<ffffffffac334809>] intel_fbdev_output_poll_changed+0x19/0x20
    [    3.480261]  [<ffffffffac262222>] drm_kms_helper_hotplug_event+0x22/0x30
    [    3.480271]  [<ffffffffac2623cc>] output_poll_execute+0x19c/0x1e0
    [    3.480280]  [<ffffffffabec6e9f>] process_one_work+0x15f/0x4c0
    [    3.480288]  [<ffffffffabec7244>] worker_thread+0x44/0x4f0
    [    3.480298]  [<ffffffffabec7200>] ? process_one_work+0x4c0/0x4c0
    [    3.480301]  [<ffffffffabec7200>] ? process_one_work+0x4c0/0x4c0
    [    3.480304]  [<ffffffffabecd056>] kthread+0xc6/0xe0
    [    3.480308]  [<ffffffffac8acc42>] ret_from_fork+0x22/0x40
    [    3.480311]  [<ffffffffabeccf90>] ? __kthread_parkme+0x70/0x70
    [    3.480313] ---[ end trace c3129ad9ddf3ddee ]---
    [    3.482049] [drm:intel_pipe_config_compare] *ERROR* mismatch in base.adjusted_mode.crtc_clock (expected 51200, found 12847)
    [    3.482060] [drm:intel_pipe_config_compare] *ERROR* mismatch in port_clock (expected 51200, found 12847)
    [    3.482063] ------------[ cut here ]------------
    [    3.482075] WARNING: CPU: 1 PID: 791 at drivers/gpu/drm/i915/intel_display.c:12921 intel_atomic_commit+0x138b/0x1630
    [    3.482078] pipe state doesn't match!
    [    3.482087] CPU: 1 PID: 791 Comm: kworker/1:1 Tainted: G        W       4.6.2+ #1
    [    3.482090] Hardware name: AAEON UP-CHT01/UP-CHT01, BIOS UPC1BM0R 05/24/2016
    [    3.482103] Workqueue: events output_poll_execute
    [    3.482115]  0000000000000000 ffff88005a69fb50 ffffffffac14ef8d ffff88005a69fba0
    [    3.482126]  0000000000000000 ffff88005a69fb90 ffffffffabeaf635 000032795a8e6e00
    [    3.482137]  ffff88005aaf7000 ffff8800552e1000 ffff88005a71fc00 ffff88005a5e9b78
    [    3.482139] Call Trace:
    [    3.482151]  [<ffffffffac14ef8d>] dump_stack+0x4d/0x70
    [    3.482159]  [<ffffffffabeaf635>] __warn+0xc5/0xe0
    [    3.482168]  [<ffffffffabeaf69c>] warn_slowpath_fmt+0x4c/0x50
    [    3.482178]  [<ffffffffac31d2ab>] intel_atomic_commit+0x138b/0x1630
    [    3.482187]  [<ffffffffabeec260>] ? wake_atomic_t_function+0x60/0x60
    [    3.482199]  [<ffffffffac2905e2>] drm_atomic_commit+0x32/0x50
    [    3.482208]  [<ffffffffac26cd4e>] restore_fbdev_mode+0x23e/0x270
    [    3.482218]  [<ffffffffac28e928>] ? drm_modeset_lock_all_ctx+0xa8/0xc0
    [    3.482229]  [<ffffffffac26f9ae>] drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x80
    [    3.482239]  [<ffffffffac26fa28>] drm_fb_helper_set_par+0x28/0x50
    [    3.482248]  [<ffffffffac26f927>] drm_fb_helper_hotplug_event+0xd7/0x130
    [    3.482260]  [<ffffffffac334809>] intel_fbdev_output_poll_changed+0x19/0x20
    [    3.482271]  [<ffffffffac262222>] drm_kms_helper_hotplug_event+0x22/0x30
    [    3.482281]  [<ffffffffac2623cc>] output_poll_execute+0x19c/0x1e0
    [    3.482290]  [<ffffffffabec6e9f>] process_one_work+0x15f/0x4c0
    [    3.482299]  [<ffffffffabec7244>] worker_thread+0x44/0x4f0
    [    3.482310]  [<ffffffffabec7200>] ? process_one_work+0x4c0/0x4c0
    [    3.482312]  [<ffffffffabec7200>] ? process_one_work+0x4c0/0x4c0
    [    3.482316]  [<ffffffffabecd056>] kthread+0xc6/0xe0
    [    3.482319]  [<ffffffffac8acc42>] ret_from_fork+0x22/0x40
    [    3.482323]  [<ffffffffabeccf90>] ? __kthread_parkme+0x70/0x70
    [    3.482324] ---[ end trace c3129ad9ddf3ddef ]---