Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1552040
Title:
Laptop sometimes doesn't detect external monitor
Status in xserver-xorg-video-intel package in Ubuntu:
Confirmed
Bug description:
Usually a reboot fixes the problem. I see stuff like this in dmesg.
[15294.887642] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting
for DDI BUF C idle bit
[15295.568309] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[15295.587193] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting
for DDI BUF C idle bit
[15296.267547] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[15296.286426] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting
for DDI BUF C idle bit
[15296.886015] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[15296.886264] [drm:intel_dp_link_training_channel_equalization [i915]]
*ERROR* failed to train DP, aborting
[15296.898472] [drm:intel_dp_link_training_channel_equalization [i915]]
*ERROR* Timed out waiting for DP idle patterns
[15296.899688] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting
for DDI BUF C idle bit
[15297.579305] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[15297.598328] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting
for DDI BUF C idle bit
[15298.279238] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[15298.298275] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting
for DDI BUF C idle bit
[15298.965500] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[15298.984539] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting
for DDI BUF C idle bit
[15299.665619] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[15299.684522] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting
for DDI BUF C idle bit
[15300.367119] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[15300.386173] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting
for DDI BUF C idle bit
[15301.067203] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[15301.086097] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting
for DDI BUF C idle bit
[15301.768998] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[15301.769703] [drm:intel_dp_link_training_channel_equalization [i915]]
*ERROR* failed to train DP, aborting
[15301.781947] [drm:intel_dp_link_training_channel_equalization [i915]]
*ERROR* Timed out waiting for DP idle patterns
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xserver-xorg-video-intel 2:2.99.917+git20160218-1ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-8.23-generic 4.4.2
Uname: Linux 4.4.0-8-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
BootLog: [[0;32m OK [0m] Started LSB: Speech Dispatcher.
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: Tue Mar 1 20:58:27 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16]
(rev 09) (prog-if 00 [VGA controller])
Subsystem: Lenovo Haswell-ULT Integrated Graphics Controller [17aa:220c]
InstallationDate: Installed on 2016-02-26 (5 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160224)
MachineType: LENOVO 20AQS00500
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-8-generic
root=UUID=bb8da1f1-8970-435e-aeaf-d7e1d9aa8a4e ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/21/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: GJET85WW (2.35 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AQS00500
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrGJET85WW(2.35):bd09/21/2015:svnLENOVO:pn20AQS00500:pvrThinkPadT440s:rvnLENOVO:rn20AQS00500:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20AQS00500
dmi.product.version: ThinkPad T440s
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.12.2+16.04.20160209-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.1.2-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.1.2-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.17.3-2ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.6.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20160218-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1
xserver.bootTime: Tue Mar 1 12:11:39 2016
xserver.configfile: default
xserver.errors: systemd-logind: failed to get session: PID 832 does not
belong to any known session
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
product id 12350
vendor AUO
xserver.version: 2:1.17.3-2ubuntu4
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