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[Bug 1388039] [NEW] Random screen blackouts

To: desktop-packages@xxxxxxxxxxxxxxxxxxx
From: Daniel Lehmann <leh@xxxxxx>
Date: Fri, 31 Oct 2014 10:56:22 -0000
Reply-to: Bug 1388039 <1388039@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

In random intervals my laptops screen goes dark and comes up seconds later with the normal graphics. 
Dmesg gets spammed with oopses like those:

26195.272441] ------------[ cut here ]------------
[26195.272453] WARNING: CPU: 0 PID: 27459 at /build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_pm.c:6001 intel_display_power_put+0xf9/0x160 [i915]()
[26195.272454] Modules linked in: snd_usb_audio snd_usbmidi_lib nls_utf8 btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c btusb rfcomm bnep bluetooth 6lowpan_iphc joydev wl(POE) applesmc input_polldev snd_hda_codec_hdmi snd_hda_codec_cirrus snd_hda_codec_generic intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_intel kvm_intel snd_hda_controller snd_hda_codec kvm snd_hwdep snd_pcm bcm5974 snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer cfg80211 lpc_ich snd nls_iso8859_1 shpchp mei_me mei soundcore sbs sbshc mac_hid apple_bl parport_pc ppdev lp parport dm_crypt hid_generic hid_apple crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel i915 aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i2c_algo_bit drm_kms_helper
[26195.272484]  ahci libahci usbhid drm hid uas usb_storage video
[26195.272488] CPU: 0 PID: 27459 Comm: Xorg Tainted: P        W  OE 3.16.0-24-generic #32-Ubuntu
[26195.272489] Hardware name: Apple Inc. MacBookPro11,1/Mac-189A3D4F975D5FFC, BIOS MBP111.88Z.0138.B11.1408291433 08/29/2014
[26195.272490]  0000000000000009 ffff880076d53bf0 ffffffff8277fcbc 0000000000000000
[26195.272492]  ffff880076d53c28 ffffffff8206fd8d ffffffffc0438800 0000000000002000
[26195.272494]  ffff880452dc8520 0000000000000000 ffff880452dc0000 ffff880076d53c38
[26195.272497] Call Trace:
[26195.272499]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
[26195.272502]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
[26195.272505]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
[26195.272513]  [<ffffffffc038a209>] intel_display_power_put+0xf9/0x160 [i915]
[26195.272527]  [<ffffffffc03f655a>] intel_hdmi_detect+0x9a/0x140 [i915]
[26195.272532]  [<ffffffffc03119c3>] drm_helper_probe_single_connector_modes_merge_bits+0x2a3/0x390 [drm_kms_helper]
[26195.272536]  [<ffffffffc0311ac3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
[26195.272546]  [<ffffffffc02bba0c>] drm_mode_getconnector+0x41c/0x480 [drm]
[26195.272552]  [<ffffffffc02aca4f>] drm_ioctl+0x1df/0x680 [drm]
[26195.272556]  [<ffffffff821f4bc8>] do_vfs_ioctl+0x2c8/0x4a0
[26195.272558]  [<ffffffff82665ff5>] ? __sys_recvmsg+0x65/0x80
[26195.272560]  [<ffffffff821f4e21>] SyS_ioctl+0x81/0xa0
[26195.272562]  [<ffffffff82787ced>] system_call_fastpath+0x1a/0x1f
[26195.272564] ---[ end trace b40040e032179882 ]---
[26195.272570] ------------[ cut here ]------------
[26195.272578] WARNING: CPU: 0 PID: 27459 at /build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_pm.c:6001 intel_display_power_put+0xf9/0x160 [i915]()
[26195.272579] Modules linked in: snd_usb_audio snd_usbmidi_lib nls_utf8 btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c btusb rfcomm bnep bluetooth 6lowpan_iphc joydev wl(POE) applesmc input_polldev snd_hda_codec_hdmi snd_hda_codec_cirrus snd_hda_codec_generic intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_intel kvm_intel snd_hda_controller snd_hda_codec kvm snd_hwdep snd_pcm bcm5974 snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer cfg80211 lpc_ich snd nls_iso8859_1 shpchp mei_me mei soundcore sbs sbshc mac_hid apple_bl parport_pc ppdev lp parport dm_crypt hid_generic hid_apple crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel i915 aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i2c_algo_bit drm_kms_helper
[26195.272608]  ahci libahci usbhid drm hid uas usb_storage video
[26195.272613] CPU: 0 PID: 27459 Comm: Xorg Tainted: P        W  OE 3.16.0-24-generic #32-Ubuntu
[26195.272614] Hardware name: Apple Inc. MacBookPro11,1/Mac-189A3D4F975D5FFC, BIOS MBP111.88Z.0138.B11.1408291433 08/29/2014
[26195.272615]  0000000000000009 ffff880076d53be0 ffffffff8277fcbc 0000000000000000
[26195.272617]  ffff880076d53c18 ffffffff8206fd8d ffffffffc0438800 0000000000008000
[26195.272619]  ffff880452dc8520 0000000000000000 ffff880452dc0000 ffff880076d53c28
[26195.272621] Call Trace:
[26195.272623]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
[26195.272626]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
[26195.272629]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
[26195.272637]  [<ffffffffc038a209>] intel_display_power_put+0xf9/0x160 [i915]
[26195.272650]  [<ffffffffc03ef725>] intel_dp_detect+0xa5/0x320 [i915]
[26195.272662]  [<ffffffffc03f655a>] ? intel_hdmi_detect+0x9a/0x140 [i915]
[26195.272667]  [<ffffffffc03119c3>] drm_helper_probe_single_connector_modes_merge_bits+0x2a3/0x390 [drm_kms_helper]
[26195.272672]  [<ffffffffc0311ac3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
[26195.272681]  [<ffffffffc02bba0c>] drm_mode_getconnector+0x41c/0x480 [drm]
[26195.272687]  [<ffffffffc02aca4f>] drm_ioctl+0x1df/0x680 [drm]
[26195.272691]  [<ffffffff821f4bc8>] do_vfs_ioctl+0x2c8/0x4a0
[26195.272693]  [<ffffffff82665ff5>] ? __sys_recvmsg+0x65/0x80
[26195.272695]  [<ffffffff821f4e21>] SyS_ioctl+0x81/0xa0
[26195.272697]  [<ffffffff82787ced>] system_call_fastpath+0x1a/0x1f
[26195.272698] ---[ end trace b40040e032179883 ]---

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64
NonfreeKernelModules: wl
.tmp.unity.support.test.0:
 
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Fri Oct 31 11:51:02 2014
DistUpgraded: 2014-10-29 10:12:53,162 DEBUG enabling apt cron job
DistroCodename: utopic
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 6.30.223.248+bdcom, 3.13.0-38-generic, x86_64: installed
 bcmwl, 6.30.223.248+bdcom, 3.16.0-24-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation Device [8086:0a2e] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Apple Inc. Device [106b:011a]
InstallationDate: Installed on 2014-10-28 (2 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Apple Inc. MacBookPro11,1
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-24-generic.efi.signed root=UUID=1b7b98a8-d52d-4373-a81d-a7bffae519f6 ro libata.force=noncq quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to utopic on 2014-10-29 (2 days ago)
dmi.bios.date: 08/29/2014
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP111.88Z.0138.B11.1408291433
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-189A3D4F975D5FFC
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro11,1
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-189A3D4F975D5FFC
dmi.modalias: dmi:bvnAppleInc.:bvrMBP111.88Z.0138.B11.1408291433:bd08/29/2014:svnAppleInc.:pnMacBookPro11,1:pvr1.0:rvnAppleInc.:rnMac-189A3D4F975D5FFC:rvrMacBookPro11,1:cvnAppleInc.:ct10:cvrMac-189A3D4F975D5FFC:
dmi.product.name: MacBookPro11,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.56-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
xserver.bootTime: Thu Oct 30 18:07:18 2014
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                               40992 
 vendor                                     APP
xserver.version: 2:1.16.0-1ubuntu1

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 ubuntu utopic

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1388039

Title:
  Random screen blackouts

Status in “xserver-xorg-video-intel” package in Ubuntu:
  New

Bug description:
  In random intervals my laptops screen goes dark and comes up seconds later with the normal graphics. 
  Dmesg gets spammed with oopses like those:

  26195.272441] ------------[ cut here ]------------
  [26195.272453] WARNING: CPU: 0 PID: 27459 at /build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_pm.c:6001 intel_display_power_put+0xf9/0x160 [i915]()
  [26195.272454] Modules linked in: snd_usb_audio snd_usbmidi_lib nls_utf8 btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c btusb rfcomm bnep bluetooth 6lowpan_iphc joydev wl(POE) applesmc input_polldev snd_hda_codec_hdmi snd_hda_codec_cirrus snd_hda_codec_generic intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_intel kvm_intel snd_hda_controller snd_hda_codec kvm snd_hwdep snd_pcm bcm5974 snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer cfg80211 lpc_ich snd nls_iso8859_1 shpchp mei_me mei soundcore sbs sbshc mac_hid apple_bl parport_pc ppdev lp parport dm_crypt hid_generic hid_apple crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel i915 aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i2c_algo_bit drm_kms_helper
  [26195.272484]  ahci libahci usbhid drm hid uas usb_storage video
  [26195.272488] CPU: 0 PID: 27459 Comm: Xorg Tainted: P        W  OE 3.16.0-24-generic #32-Ubuntu
  [26195.272489] Hardware name: Apple Inc. MacBookPro11,1/Mac-189A3D4F975D5FFC, BIOS MBP111.88Z.0138.B11.1408291433 08/29/2014
  [26195.272490]  0000000000000009 ffff880076d53bf0 ffffffff8277fcbc 0000000000000000
  [26195.272492]  ffff880076d53c28 ffffffff8206fd8d ffffffffc0438800 0000000000002000
  [26195.272494]  ffff880452dc8520 0000000000000000 ffff880452dc0000 ffff880076d53c38
  [26195.272497] Call Trace:
  [26195.272499]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
  [26195.272502]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
  [26195.272505]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
  [26195.272513]  [<ffffffffc038a209>] intel_display_power_put+0xf9/0x160 [i915]
  [26195.272527]  [<ffffffffc03f655a>] intel_hdmi_detect+0x9a/0x140 [i915]
  [26195.272532]  [<ffffffffc03119c3>] drm_helper_probe_single_connector_modes_merge_bits+0x2a3/0x390 [drm_kms_helper]
  [26195.272536]  [<ffffffffc0311ac3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
  [26195.272546]  [<ffffffffc02bba0c>] drm_mode_getconnector+0x41c/0x480 [drm]
  [26195.272552]  [<ffffffffc02aca4f>] drm_ioctl+0x1df/0x680 [drm]
  [26195.272556]  [<ffffffff821f4bc8>] do_vfs_ioctl+0x2c8/0x4a0
  [26195.272558]  [<ffffffff82665ff5>] ? __sys_recvmsg+0x65/0x80
  [26195.272560]  [<ffffffff821f4e21>] SyS_ioctl+0x81/0xa0
  [26195.272562]  [<ffffffff82787ced>] system_call_fastpath+0x1a/0x1f
  [26195.272564] ---[ end trace b40040e032179882 ]---
  [26195.272570] ------------[ cut here ]------------
  [26195.272578] WARNING: CPU: 0 PID: 27459 at /build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_pm.c:6001 intel_display_power_put+0xf9/0x160 [i915]()
  [26195.272579] Modules linked in: snd_usb_audio snd_usbmidi_lib nls_utf8 btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c btusb rfcomm bnep bluetooth 6lowpan_iphc joydev wl(POE) applesmc input_polldev snd_hda_codec_hdmi snd_hda_codec_cirrus snd_hda_codec_generic intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_intel kvm_intel snd_hda_controller snd_hda_codec kvm snd_hwdep snd_pcm bcm5974 snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer cfg80211 lpc_ich snd nls_iso8859_1 shpchp mei_me mei soundcore sbs sbshc mac_hid apple_bl parport_pc ppdev lp parport dm_crypt hid_generic hid_apple crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel i915 aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i2c_algo_bit drm_kms_helper
  [26195.272608]  ahci libahci usbhid drm hid uas usb_storage video
  [26195.272613] CPU: 0 PID: 27459 Comm: Xorg Tainted: P        W  OE 3.16.0-24-generic #32-Ubuntu
  [26195.272614] Hardware name: Apple Inc. MacBookPro11,1/Mac-189A3D4F975D5FFC, BIOS MBP111.88Z.0138.B11.1408291433 08/29/2014
  [26195.272615]  0000000000000009 ffff880076d53be0 ffffffff8277fcbc 0000000000000000
  [26195.272617]  ffff880076d53c18 ffffffff8206fd8d ffffffffc0438800 0000000000008000
  [26195.272619]  ffff880452dc8520 0000000000000000 ffff880452dc0000 ffff880076d53c28
  [26195.272621] Call Trace:
  [26195.272623]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
  [26195.272626]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
  [26195.272629]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
  [26195.272637]  [<ffffffffc038a209>] intel_display_power_put+0xf9/0x160 [i915]
  [26195.272650]  [<ffffffffc03ef725>] intel_dp_detect+0xa5/0x320 [i915]
  [26195.272662]  [<ffffffffc03f655a>] ? intel_hdmi_detect+0x9a/0x140 [i915]
  [26195.272667]  [<ffffffffc03119c3>] drm_helper_probe_single_connector_modes_merge_bits+0x2a3/0x390 [drm_kms_helper]
  [26195.272672]  [<ffffffffc0311ac3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
  [26195.272681]  [<ffffffffc02bba0c>] drm_mode_getconnector+0x41c/0x480 [drm]
  [26195.272687]  [<ffffffffc02aca4f>] drm_ioctl+0x1df/0x680 [drm]
  [26195.272691]  [<ffffffff821f4bc8>] do_vfs_ioctl+0x2c8/0x4a0
  [26195.272693]  [<ffffffff82665ff5>] ? __sys_recvmsg+0x65/0x80
  [26195.272695]  [<ffffffff821f4e21>] SyS_ioctl+0x81/0xa0
  [26195.272697]  [<ffffffff82787ced>] system_call_fastpath+0x1a/0x1f
  [26195.272698] ---[ end trace b40040e032179883 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4
  ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
  Uname: Linux 3.16.0-24-generic x86_64
  NonfreeKernelModules: wl
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Fri Oct 31 11:51:02 2014
  DistUpgraded: 2014-10-29 10:12:53,162 DEBUG enabling apt cron job
  DistroCodename: utopic
  DistroVariant: ubuntu
  DkmsStatus:
   bcmwl, 6.30.223.248+bdcom, 3.13.0-38-generic, x86_64: installed
   bcmwl, 6.30.223.248+bdcom, 3.16.0-24-generic, x86_64: installed
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation Device [8086:0a2e] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Apple Inc. Device [106b:011a]
  InstallationDate: Installed on 2014-10-28 (2 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Apple Inc. MacBookPro11,1
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-24-generic.efi.signed root=UUID=1b7b98a8-d52d-4373-a81d-a7bffae519f6 ro libata.force=noncq quiet splash vt.handoff=7
  SourcePackage: xserver-xorg-video-intel
  UpgradeStatus: Upgraded to utopic on 2014-10-29 (2 days ago)
  dmi.bios.date: 08/29/2014
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP111.88Z.0138.B11.1408291433
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-189A3D4F975D5FFC
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro11,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-189A3D4F975D5FFC
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP111.88Z.0138.B11.1408291433:bd08/29/2014:svnAppleInc.:pnMacBookPro11,1:pvr1.0:rvnAppleInc.:rnMac-189A3D4F975D5FFC:rvrMacBookPro11,1:cvnAppleInc.:ct10:cvrMac-189A3D4F975D5FFC:
  dmi.product.name: MacBookPro11,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.
  version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.56-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu3
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu3
  version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
  xserver.bootTime: Thu Oct 30 18:07:18 2014
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               40992 
   vendor                                     APP
  xserver.version: 2:1.16.0-1ubuntu1

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Follow ups

[Bug 1388039] Re: Random screen blackouts
From: Christopher M. Penalver, 2015-09-27
[Bug 1388039] [NEW] Random screen blackouts
From: Daniel Lehmann, 2014-10-31
References

[Bug 1388039] [NEW] Random screen blackouts
From: Daniel Lehmann, 2014-10-31