[Bug 1468373] [NEW] GPU driver issues when waking up from suspend mode

uszatan 1468373 at bugs.launchpad.net
Wed Jun 24 13:59:08 UTC 2015 

*** This bug is a security vulnerability ***

Public security bug reported:

I have noticed strange issue, since i updated my kubuntu from 14.10 to 15.04. So the system suspend works fine, but from time to time when i wake my PC up from this mode, I see only some weird triangles, chaotically moving on a screen. It looks like on the picture i taken.
What i see in logs is:

Jun 24 14:09:51 piotrek-laptop kernel: [153517.132246] WARNING: CPU: 0 PID: 842 at /build/buildd/linux-3.19.0/drivers/gpu/drm/i915/intel_display.c:1256 assert_plane.constprop.87+0x7b/0x90 [
i915]()
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132247] plane A assertion failure (expected on, current off)
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132270] Modules linked in: ctr ccm vmnet(OE) vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OE) bbswitch(OE) rfcomm bnep nls_iso8859_1 hid_gene
ric usbhid arc4 btusb bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media nvidia(POE) uas usb_storage asus_nb_wmi asus_wmi sparse_keymap iwlmvm m
xm_wmi mac80211 intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel snd_hda_codec_conexant aes_x86
_64 iwlwifi lrw snd_hda_codec_generic gf128mul glue_helper ablk_helper cryptd joydev serio_raw cfg80211 snd_hda_codec_hdmi snd_soc_rt5640 lpc_ich shpchp snd_soc_rl6231 snd_hda_intel mei_me 
snd_soc_core snd_hda_controller mei snd_hda_codec snd_compress snd_hwdep snd_pcm_dmaengine snd_pcm snd_seq_midi processor_thermal_device snd_seq_midi_event snd_rawmidi snd_seq snd_seq_devic
e snd_timer snd soundcore wmi i2c_hid hid dw_dmac dw_dmac_core snd_soc_sst_acpi 8250_dw i2c_designware_platform i2c_designware_core spi_pxa2xx_platform int3402_thermal int3400_thermal acpi_
thermal_rel acpi_pad mac_hid parport_pc ppdev lp parport autofs4 i915 i2c_algo_bit drm_kms_helper drm ahci psmouse(OE) libahci video sdhci_acpi sdhci
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132286] CPU: 0 PID: 842 Comm: Xorg Tainted: P        W  OE  3.19.0-21-generic #21-Ubuntu
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132286] Hardware name: ASUSTeK COMPUTER INC. UX303LNB/UX303LNB, BIOS UX303LNB.206 01/22/2015
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132288]  ffffffffc03d4de8 ffff88031cbe36f8 ffffffff817c3da8 00000000b118b118
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132290]  ffff88031cbe3748 ffff88031cbe3738 ffffffff810769aa ffff8800a2c4ee00
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132291]  0000000000000000 ffff880320a51000 ffff880320a4a800 ffff880320a4a800
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132292] Call Trace:
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132300]  [<ffffffff817c3da8>] dump_stack+0x45/0x57
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132302]  [<ffffffff810769aa>] warn_slowpath_common+0x8a/0xc0
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132304]  [<ffffffff81076a26>] warn_slowpath_fmt+0x46/0x50
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132308]  [<ffffffff81199e30>] ? zone_statistics+0x80/0xa0
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132327]  [<ffffffffc03712eb>] assert_plane.constprop.87+0x7b/0x90 [i915]
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132344]  [<ffffffffc0379561>] hsw_disable_ips+0x41/0x190 [i915]
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132360]  [<ffffffffc0379928>] intel_crtc_disable_planes+0x48/0x140 [i915]
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132375]  [<ffffffffc037a68f>] haswell_crtc_disable+0x4f/0x3c0 [i915]
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132391]  [<ffffffffc037b629>] __intel_set_mode+0xa59/0xc80 [i915]
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132407]  [<ffffffffc03821fb>] intel_crtc_set_config+0xbfb/0xf70 [i915]
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132410]  [<ffffffff81048362>] ? native_send_call_func_ipi+0xa2/0xb0
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132427]  [<ffffffffc027cac6>] drm_mode_set_config_internal+0x66/0x100 [drm]
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132437]  [<ffffffffc02ed298>] restore_fbdev_mode+0xc8/0xf0 [drm_kms_helper]
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132445]  [<ffffffffc02ef309>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper]
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132451]  [<ffffffffc02ef382>] drm_fb_helper_set_par+0x22/0x50 [drm_kms_helper]
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132467]  [<ffffffffc038e17a>] intel_fbdev_set_par+0x1a/0x60 [i915]
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132470]  [<ffffffff8143502a>] fb_set_var+0x18a/0x410
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132473]  [<ffffffff8109fca9>] ? check_preempt_curr+0x89/0xa0
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132475]  [<ffffffff810a72a8>] ? __enqueue_entity+0x78/0x80
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132477]  [<ffffffff810aec70>] ? enqueue_entity+0x400/0xc30
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132480]  [<ffffffff8102003f>] ? __switch_to_xtra+0x13f/0x170
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132482]  [<ffffffff8142ba59>] fbcon_blank+0x229/0x300
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132486]  [<ffffffff810138df>] ? __switch_to+0x44f/0x5e0
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132489]  [<ffffffff814bb6fa>] do_unblank_screen+0xba/0x1f0
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132491]  [<ffffffff814b11ed>] complete_change_console+0x5d/0xf0
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132493]  [<ffffffff814b240a>] vt_ioctl+0x118a/0x1460
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132504]  [<ffffffffc027191c>] ? drm_ioctl+0x8c/0x680 [drm]
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132507]  [<ffffffff814a43e1>] tty_ioctl+0x411/0xcb0
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132508]  [<ffffffff810a72a8>] ? __enqueue_entity+0x78/0x80
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132511]  [<ffffffff8102003f>] ? __switch_to_xtra+0x13f/0x170
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132512]  [<ffffffff810a945d>] ? set_next_entity+0x9d/0xb0
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132514]  [<ffffffff81209230>] do_vfs_ioctl+0x2e0/0x4e0
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132517]  [<ffffffff817c5ffc>] ? __schedule+0x39c/0x8e0
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132519]  [<ffffffff812094b1>] SyS_ioctl+0x81/0xa0
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132521]  [<ffffffff817caecd>] system_call_fastpath+0x16/0x1b
Jun 24 14:09:51 piotrek-laptop kernel: [153517.132522] ---[ end trace 472a33b7002eaf2b ]---
Jun 24 14:09:51 piotrek-laptop kernel: [153518.032953] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Jun 24 14:09:52 piotrek-laptop NetworkManager[702]: <info> VPN service 'openconnect' disappeared
Jun 24 14:10:01 piotrek-laptop acpid: client connected from 842[0:0]
Jun 24 14:10:01 piotrek-laptop acpid: 1 client rule loaded
Jun 24 14:10:02 piotrek-laptop kernel: [153529.254144] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Jun 24 14:10:05 piotrek-laptop acpid: client 842[0:0] has disconnected
Jun 24 14:10:06 piotrek-laptop kernel: [153531.975961] ------------[ cut here ]------------


This error is instantly repeating.

Sometimes, after few seconds, this issue just dissapears, sometimes reboot is necessary.
I use nvidia as a primary display:
i   nvidia-346                                                                             - NVIDIA binary driver - version 346.59               

I have 2 external screens attached (1 connected to HDMI, second to
display port), laptop's screen is not used.

My configuration details:


piotrek at piotrek-laptop:/var/log$ lspci 
00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09)
00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
00:04.0 Signal processing controller: Intel Corporation Broadwell-U Camarillo Device (rev 09)
00:14.0 USB controller: Intel Corporation Wildcat Point-LP USB xHCI Controller (rev 03)
00:16.0 Communication controller: Intel Corporation Wildcat Point-LP MEI Controller #1 (rev 03)
00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #1 (rev e3)
00:1c.3 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #4 (rev e3)
00:1c.4 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #5 (rev e3)
00:1f.0 ISA bridge: Intel Corporation Wildcat Point-LP LPC Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] (rev 03)
00:1f.3 SMBus: Intel Corporation Wildcat Point-LP SMBus Controller (rev 03)
00:1f.6 Signal processing controller: Intel Corporation Wildcat Point-LP Thermal Management Controller (rev 03)
02:00.0 Network controller: Intel Corporation Wireless 7265 (rev 59)
03:00.0 3D controller: NVIDIA Corporation GM108M [GeForce 840M] (rev a2)

** Affects: libdrm (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "screen_issue.jpg"
   https://bugs.launchpad.net/bugs/1468373/+attachment/4419998/+files/screen_issue.jpg

** Package changed: mysql-5.6 (Ubuntu) => libdrm (Ubuntu)

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https://bugs.launchpad.net/bugs/1468373

Title:
  GPU driver issues when waking up from suspend mode

Status in libdrm package in Ubuntu:
  New

Bug description:
  I have noticed strange issue, since i updated my kubuntu from 14.10 to 15.04. So the system suspend works fine, but from time to time when i wake my PC up from this mode, I see only some weird triangles, chaotically moving on a screen. It looks like on the picture i taken.
  What i see in logs is:

  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132246] WARNING: CPU: 0 PID: 842 at /build/buildd/linux-3.19.0/drivers/gpu/drm/i915/intel_display.c:1256 assert_plane.constprop.87+0x7b/0x90 [
  i915]()
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132247] plane A assertion failure (expected on, current off)
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132270] Modules linked in: ctr ccm vmnet(OE) vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OE) bbswitch(OE) rfcomm bnep nls_iso8859_1 hid_gene
  ric usbhid arc4 btusb bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media nvidia(POE) uas usb_storage asus_nb_wmi asus_wmi sparse_keymap iwlmvm m
  xm_wmi mac80211 intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel snd_hda_codec_conexant aes_x86
  _64 iwlwifi lrw snd_hda_codec_generic gf128mul glue_helper ablk_helper cryptd joydev serio_raw cfg80211 snd_hda_codec_hdmi snd_soc_rt5640 lpc_ich shpchp snd_soc_rl6231 snd_hda_intel mei_me 
  snd_soc_core snd_hda_controller mei snd_hda_codec snd_compress snd_hwdep snd_pcm_dmaengine snd_pcm snd_seq_midi processor_thermal_device snd_seq_midi_event snd_rawmidi snd_seq snd_seq_devic
  e snd_timer snd soundcore wmi i2c_hid hid dw_dmac dw_dmac_core snd_soc_sst_acpi 8250_dw i2c_designware_platform i2c_designware_core spi_pxa2xx_platform int3402_thermal int3400_thermal acpi_
  thermal_rel acpi_pad mac_hid parport_pc ppdev lp parport autofs4 i915 i2c_algo_bit drm_kms_helper drm ahci psmouse(OE) libahci video sdhci_acpi sdhci
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132286] CPU: 0 PID: 842 Comm: Xorg Tainted: P        W  OE  3.19.0-21-generic #21-Ubuntu
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132286] Hardware name: ASUSTeK COMPUTER INC. UX303LNB/UX303LNB, BIOS UX303LNB.206 01/22/2015
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132288]  ffffffffc03d4de8 ffff88031cbe36f8 ffffffff817c3da8 00000000b118b118
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132290]  ffff88031cbe3748 ffff88031cbe3738 ffffffff810769aa ffff8800a2c4ee00
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132291]  0000000000000000 ffff880320a51000 ffff880320a4a800 ffff880320a4a800
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132292] Call Trace:
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132300]  [<ffffffff817c3da8>] dump_stack+0x45/0x57
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132302]  [<ffffffff810769aa>] warn_slowpath_common+0x8a/0xc0
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132304]  [<ffffffff81076a26>] warn_slowpath_fmt+0x46/0x50
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132308]  [<ffffffff81199e30>] ? zone_statistics+0x80/0xa0
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132327]  [<ffffffffc03712eb>] assert_plane.constprop.87+0x7b/0x90 [i915]
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132344]  [<ffffffffc0379561>] hsw_disable_ips+0x41/0x190 [i915]
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132360]  [<ffffffffc0379928>] intel_crtc_disable_planes+0x48/0x140 [i915]
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132375]  [<ffffffffc037a68f>] haswell_crtc_disable+0x4f/0x3c0 [i915]
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132391]  [<ffffffffc037b629>] __intel_set_mode+0xa59/0xc80 [i915]
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132407]  [<ffffffffc03821fb>] intel_crtc_set_config+0xbfb/0xf70 [i915]
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132410]  [<ffffffff81048362>] ? native_send_call_func_ipi+0xa2/0xb0
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132427]  [<ffffffffc027cac6>] drm_mode_set_config_internal+0x66/0x100 [drm]
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132437]  [<ffffffffc02ed298>] restore_fbdev_mode+0xc8/0xf0 [drm_kms_helper]
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132445]  [<ffffffffc02ef309>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper]
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132451]  [<ffffffffc02ef382>] drm_fb_helper_set_par+0x22/0x50 [drm_kms_helper]
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132467]  [<ffffffffc038e17a>] intel_fbdev_set_par+0x1a/0x60 [i915]
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132470]  [<ffffffff8143502a>] fb_set_var+0x18a/0x410
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132473]  [<ffffffff8109fca9>] ? check_preempt_curr+0x89/0xa0
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132475]  [<ffffffff810a72a8>] ? __enqueue_entity+0x78/0x80
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132477]  [<ffffffff810aec70>] ? enqueue_entity+0x400/0xc30
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132480]  [<ffffffff8102003f>] ? __switch_to_xtra+0x13f/0x170
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132482]  [<ffffffff8142ba59>] fbcon_blank+0x229/0x300
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132486]  [<ffffffff810138df>] ? __switch_to+0x44f/0x5e0
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132489]  [<ffffffff814bb6fa>] do_unblank_screen+0xba/0x1f0
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132491]  [<ffffffff814b11ed>] complete_change_console+0x5d/0xf0
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132493]  [<ffffffff814b240a>] vt_ioctl+0x118a/0x1460
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132504]  [<ffffffffc027191c>] ? drm_ioctl+0x8c/0x680 [drm]
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132507]  [<ffffffff814a43e1>] tty_ioctl+0x411/0xcb0
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132508]  [<ffffffff810a72a8>] ? __enqueue_entity+0x78/0x80
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132511]  [<ffffffff8102003f>] ? __switch_to_xtra+0x13f/0x170
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132512]  [<ffffffff810a945d>] ? set_next_entity+0x9d/0xb0
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132514]  [<ffffffff81209230>] do_vfs_ioctl+0x2e0/0x4e0
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132517]  [<ffffffff817c5ffc>] ? __schedule+0x39c/0x8e0
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132519]  [<ffffffff812094b1>] SyS_ioctl+0x81/0xa0
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132521]  [<ffffffff817caecd>] system_call_fastpath+0x16/0x1b
  Jun 24 14:09:51 piotrek-laptop kernel: [153517.132522] ---[ end trace 472a33b7002eaf2b ]---
  Jun 24 14:09:51 piotrek-laptop kernel: [153518.032953] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
  Jun 24 14:09:52 piotrek-laptop NetworkManager[702]: <info> VPN service 'openconnect' disappeared
  Jun 24 14:10:01 piotrek-laptop acpid: client connected from 842[0:0]
  Jun 24 14:10:01 piotrek-laptop acpid: 1 client rule loaded
  Jun 24 14:10:02 piotrek-laptop kernel: [153529.254144] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
  Jun 24 14:10:05 piotrek-laptop acpid: client 842[0:0] has disconnected
  Jun 24 14:10:06 piotrek-laptop kernel: [153531.975961] ------------[ cut here ]------------

  
  This error is instantly repeating.

  Sometimes, after few seconds, this issue just dissapears, sometimes reboot is necessary.
  I use nvidia as a primary display:
  i   nvidia-346                                                                             - NVIDIA binary driver - version 346.59               

  I have 2 external screens attached (1 connected to HDMI, second to
  display port), laptop's screen is not used.

  My configuration details:

  
  piotrek at piotrek-laptop:/var/log$ lspci 
  00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 09)
  00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09)
  00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
  00:04.0 Signal processing controller: Intel Corporation Broadwell-U Camarillo Device (rev 09)
  00:14.0 USB controller: Intel Corporation Wildcat Point-LP USB xHCI Controller (rev 03)
  00:16.0 Communication controller: Intel Corporation Wildcat Point-LP MEI Controller #1 (rev 03)
  00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03)
  00:1c.0 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #1 (rev e3)
  00:1c.3 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #4 (rev e3)
  00:1c.4 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #5 (rev e3)
  00:1f.0 ISA bridge: Intel Corporation Wildcat Point-LP LPC Controller (rev 03)
  00:1f.2 SATA controller: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] (rev 03)
  00:1f.3 SMBus: Intel Corporation Wildcat Point-LP SMBus Controller (rev 03)
  00:1f.6 Signal processing controller: Intel Corporation Wildcat Point-LP Thermal Management Controller (rev 03)
  02:00.0 Network controller: Intel Corporation Wireless 7265 (rev 59)
  03:00.0 3D controller: NVIDIA Corporation GM108M [GeForce 840M] (rev a2)

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